SMA FLEXIBLE STORAGE SYSTEM with Battery Backup Function

Installation - Quick Reference Guide
SMA FLEXIBLE STORAGE SYSTEM with Battery Backup Function
Battery backup systems including increased self-consumption with
SUNNY ISLAND 3.0M / 4.4M / 6.0H / 8.0H and SUNNY HOME MANAGER
Ersatzstrom-IS-en-33 | Version 3.3
ENGLISH
Legal Provisions
SMA Solar Technology AG
Legal Provisions
The information contained in this document is the property of SMA Solar Technology AG. Publishing its content, either
partially or in full, requires the written permission of SMA Solar Technology AG. Any internal company copying of the
document for the purposes of evaluating the product or its correct implementation is allowed and does not require
permission.
SMA Warranty
You can download the current warranty conditions from the Internet at www.SMA-Solar.com.
Trademarks
All trademarks are recognized, even if not explicitly identified as such. A lack of identification does not mean that a
product or symbol is not trademarked.
The BLUETOOTH® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of these
marks by SMA Solar Technology AG is under license.
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QR Code is a registered trademark of DENSO WAVE INCORPORATED.
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SMA Solar Technology AG
Sonnenallee 1
34266 Niestetal
Germany
Tel. +49 561 9522-0
Fax +49 561 9522-100
www.SMA.de
E-mail: info@SMA.de
© 2004 to 2016 SMA Solar Technology AG. All rights reserved.
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Table of Contents
Table of Contents
1
Information on This Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1
1.2
1.3
1.4
1.5
1.6
1.7
2
Validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Content and Structure of This Document. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Target Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Information Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
5
5
5
6
6
6
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3
Information and System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1
3.2
3.3
3.4
3.5
4
Requirements of the “VDE Forum Network Technology / Network Operations (FNN)” . . . . . . . . . . . . . . .
Requirements of VDE Application Guide 2510-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Design and Functions of the Battery-Backup System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Design and Functions of the Automatic Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12
12
13
16
17
3.5.1
Devices of the Automatic Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
3.5.2
Grid Disconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
3.5.3
3.5.4
Grounding Device for the Battery-Backup Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Phase Coupling for Single-Phase Battery-Backup Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Battery-Backup Systems With All-Pole Disconnection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.1 Single-Phase Battery-Backup System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.1.1
Schematic Diagram of the Automatic Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
4.1.2
Circuitry Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
4.1.3
Connecting the Sunny Island Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
4.2 Three-Phase Battery-Backup System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5
4.2.1
4.2.2
Schematic Diagram of the Automatic Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Circuitry Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
4.2.3
Connecting the Master . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
4.2.4
Connecting the Slaves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Battery-Backup Systems Without All-Pole Disconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.1 Single-Phase Battery-Backup System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.1.1
Schematic Diagram of the Automatic Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
5.1.2
Circuitry Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
5.1.3
Connecting the Sunny Island Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
5.2 Three-Phase Battery-Backup System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.2.1
Schematic Diagram of the Automatic Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
5.2.2
Circuitry Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
5.2.3
Connecting the Master . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
5.2.4
Connecting the Slaves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
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6
Connecting the Sunny Home Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
7
Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
7.1 Basic Configuration of the Sunny Island Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.2 Testing the Automatic Transfer Switch Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.3 Adjusting the Configuration of the Sunny Island Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7.4
7.5
7.6
7.7
7.3.1
Countries in Which the Configuration Must Be Adjusted. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
7.3.2
7.3.3
Adjusting the Configuration for Denmark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Adjusting the Configuration for Austria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
7.3.4
Adjusting the Configuration for Switzerland . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Adjusting the Configuration of the PV Inverters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Attaching the Labels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Activating Phase Coupling in Single-Phase Battery-Backup Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commissioning a System With Increased Self-Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
49
50
50
50
7.7.1
Preparing BLUETOOTH Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
7.7.2
Commissioning a System with Increased Self-Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
7.8 Commissioning a System without Increased Self-Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
8
Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
8.1 Single-Phase Battery-Backup System in Belgium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
8.1.1
Schematic Diagram of the Automatic Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
8.1.2
Circuitry Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
8.2 Three-Phase Battery-Backup System in Belgium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9
4
8.2.1
Schematic Diagram of the Automatic Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
8.2.2
Circuitry Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Contact. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
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SMA Solar Technology AG
1 Information on This Document
1 Information on This Document
1.1 Validity
This document is valid for the SMA Flexible Storage System with battery-backup function with the following
SMA products:
• HM-BT-10.GR2 (Sunny Home Manager) with firmware version 1.04 or higher
• SI3.0M-11 (Sunny Island 3.0M) with firmware version 3.2
• SI4.4M-11 (Sunny Island 4.4M) with firmware version 3.2
• SI6.0H-11 (Sunny Island 6.0H) with firmware version 3.1
• SI8.0H-11 (Sunny Island 8.0H) with firmware version 3.1
1.2 Content and Structure of This Document
This document summarizes the specific information for the SMA Flexible Storage System with battery-backup function
(battery-backup system). Circuitry overviews provide you with a basis for setting up a battery-backup system. The structure
of the document specifies the chronological sequence for configuration and commissioning. This document does not
replace the documentation of the individual products. You will find details and help in the event of difficulties in the
documentation of the respective product.
1.3 Target Group
The activities described in this document must only be performed by qualified persons. Qualified persons must have the
following skills:
• Training in how to deal with the dangers and risks associated with installing and using electrical devices and batteries
• Training in the installation and commissioning of electrical devices
• Knowledge of and adherence to the local standards and directives
• Knowledge of and compliance with this document and all safety information
1.4 Additional Information
Links to additional information can be found at www.SMA-Solar.com:
Document title
Document type
SMA Flexible Storage System with Battery-Backup Function
Planning guidelines
Multicluster Systems with Stand-Alone Grid or Increased Self-Consumption and
Battery-Backup Function
Installation quick reference guide
Installation - Quick Reference Guide
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1 Information on This Document
SMA Solar Technology AG
1.5 Information Symbols
Symbol
Explanation
'$1*(5
Indicates a hazardous situation that, if not avoided, will result in death or serious injury
:$51,1*
Indicates a hazardous situation that, if not avoided, can result in death or serious injury
&$87,21
Indicates a hazardous situation that, if not avoided, can result in minor or moderate injury
/05*$&
Indicates a situation that, if not avoided, can result in property damage
Information that is important for a specific topic or goal but is not safety-relevant
☐
Indicates a requirement for meeting a specific goal
☑
Desired result
✖
A problem that might occur
1.6 Typography
Typography
Usage
Bold
Example
• Connect the grounding conductor to
AC 2Gen/Grid.
• Display messages
• Parameters
• Select parameter 235.01 GnAutoEna
and set it to Off.
• Connections
• Slots
• Elements to be selected
• Elements to be entered
>
• Several elements that are to be selected
• Select 600# Direct Access > Select
Number.
[Button/Key]
• Button/key on the inverter to be selected
or pressed
• Press [ENTER].
1.7 Nomenclature
Complete designation
Designation in this document
SMA Flexible Storage System with Battery-Backup
Function
Battery-backup system
Sunny Boy, Sunny Mini Central, Sunny Tripower
PV inverters
Grid failure or deviation from the country-specific limiting
values for voltage and frequency
Grid failure
Automatic transfer switch with battery-backup function
Automatic transfer switch
Gird-forming generators such as electric generators or
utility grids
External energy sources
Sunny Explorer, Sunny Portal, Sunny Home Manager
Communication product
The term parameter includes parameters with configurable values as well as parameters for displaying values.
6
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2 Safety
2 Safety
2.1 Intended Use
In the event of grid failure, a battery-backup system with Sunny Island supplies loads with energy and a grid-tie PV system
with voltage. In the event of grid failure, an automatic transfer switch disconnects the battery-backup grid from the utility
grid. After disconnection, the loads and the PV system are not supplied for approximately five to seven seconds. The
battery-backup system can then provide active power and reactive power again. The battery-backup system supplies the
loads, and the PV system can synchronize with the battery-backup grid and feed in.
The battery-backup system should only be used in countries for which it is licensed or for which it is released by
SMA Solar Technology AG and the grid operator. To fulfill the technical connection requirements of the grid operator
and the local standards and directives, you must select one of the following basic structures:
• Battery-backup system with all-pole disconnection
In the event of grid failure, a tie switch disconnects all line conductors and the neutral conductor from the utility grid.
The tie switch is designed with built-in redundancy. If the technical connection requirements of the grid operator or
the local standards and directives call for or allow all-pole disconnection, you must install this basic structure. You
must install all-pole disconnection in the following countries:
– Belgium
– Denmark
– Germany
– Austria
– Switzerland
• Battery-backup system without all-pole disconnection
In the event of grid failure, a tie switch disconnects all line conductors from the utility grid. The neutral conductor of
the battery-backup grid remains permanently connected to the utility grid. If the technical connection requirements
of the grid operator or the local standards and directives prohibit disconnection of the neutral conductor, you must
install this basic structure.
Each basic structure can be designed either as a three-phase battery-backup grid or as a single-phase battery-backup
grid. Single-phase battery-backup grids can be connected to three-phase utility grids.
In a three-phase battery-backup system, in the event of grid failure, three Sunny Island inverters supply all line conductors
with the corresponding line conductor. The three Sunny Island inverters are connected in parallel on the DC side and form
one cluster. Only Sunny Island inverters of the same device type may be installed in a cluster. In a three-phase
battery-backup system, both single-phase and three-phase PV inverters can be connected. Multiple clusters must not be
connected together.
In a single-phase battery-backup system, in the event of grid failure, one Sunny Island supplies the battery-backup grid.
A grid failure is only recognized at the line conductor that is connected to the Sunny Island. In the event of grid failure,
only single-phase PV inverters can feed into a single-phase battery-backup grid. In the event of grid failure, a phase
coupling enables combination of the line conductors into a single-phase distribution grid. With phase coupling, all the
loads in the battery-backup grid must be single-phase. No more than one Sunny Island may be connected in a
single-phase battery-backup system.
A PV system can be connected in the battery-backup grid. The PV system must be suitable for use in battery-backup
systems (see the planning guidelines “SMA Flexible Storage System with Battery Backup Function” at
www.SMA-Solar.com). The power of the PV system must be appropriate for the system (see Section 3.3 "System
Information", page 13).
The automatic transfer switch is not a distribution board for the loads or the PV system. The loads and the PV system must
be secured with protective devices in accordance with the local standards and directives. Grid-forming voltage sources
(e.g., generators) must not be connected.
The utility grid connected to the automatic transfer switch must be a TN or TT system. The battery-backup system is not
suitable for supplying life-sustaining medical devices.
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2 Safety
SMA Solar Technology AG
In battery-backup systems, the Sunny Island uses lead-acid batteries or lithium-ion batteries for energy storage. Ensure
that the battery room is sufficiently ventilated when using lead-acid batteries (see battery manufacturer’s documentation).
If lithium-ion batteries are connected, the battery management of the lithium-ion battery must be compatible with the
Sunny Island (see the technical information “List of Approved Lithium-Ion Batteries” at www.SMA-Solar.com). The
lithium-ion battery must be able to supply enough current at maximum output power of the Sunny Island inverter
(for technical data, see the Sunny Island inverter installation manual).
In single-phase battery-backup systems, the multifunction relays of the Sunny Island inverter cannot be configured.
In three-phase battery-backup systems, the slaves can control devices in the system (e.g., load-shedding contactors), each
via two multifunction relays. The multifunction relays of the master cannot be configured.
The automatic transfer switch must be wired and connected in accordance with this documentation. The equipment or
devices of the automatic transfer switch must satisfy protection class II and be operable without prior knowledge of
electrical technology.
In battery-backup systems, the following products must not be connected:
• Sunny Island Charger or other DC charge controllers
• DC loads
The battery-backup system records the grid feed-in and purchased electricity with an SMA Energy Meter only.
An SMA Energy Meter does not replace the energy meter of the electric utility company. The grid feed-in and the
purchased electricity are transmitted to one Sunny Island via Speedwire. To enable this, the Sunny Island must be fitted
with the Speedwire data module Sunny Island.
The Sunny Home Manager must not be installed in PV systems in which a SMA Cluster Controller is installed.
Use this system only in accordance with the information provided in the enclosed documentation and with the locally
applicable standards and directives. Any other application may cause personal injury or property damage.
Alterations to the system, e.g. modifications or conversions, are only permitted with the express written permission of
SMA Solar Technology AG. Unauthorized alterations will void guarantee and warranty claims and usually void the
operating license. SMA Solar Technology AG shall not be held liable for any damage caused by such alterations.
Any use of the system other than that described in the Intended Use section does not qualify as the intended use.
The enclosed documentation is an integral part of this system. Keep the documentation in a convenient place for future
reference and observe all instructions contained therein.
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2 Safety
2.2 Safety Information
This section contains safety information that must be observed at all times when working on or with the system. To prevent
personal injury and property damage and to ensure long-term operation of the system, read this section carefully and
observe all safety information at all times.
:$51,1*
Danger to life from electric shock due to circuit breakers that cannot be tripped
In the battery-backup grid, only the circuit breakers that can be tripped by the Sunny Island can be tripped in the event
of a grid failure. Circuit breakers with a higher tripping characteristic cannot be tripped. Under fault conditions, there
may be a voltage that poses a danger to life present on accessible parts for several seconds. This can result in death
or serious injury.
• Check if a circuit breaker has a higher trip characteristic than the following circuit breakers which can be tripped:
– SI3.0M-11 and SI4.4M-11: circuit breaker with trip characteristic B6 (B6A)
– SI6.0H-11 and SI8.0H-11: circuit breaker with trip characteristic B16 (B16A) or circuit breaker with trip
characteristic C6 (C6A)
If a circuit breaker has a higher trip characteristic than the specified circuit breaker that can be tripped, you should
also install a residual-current device of type A.
Danger to life from electric shock due to live voltage
High voltages are present in the battery-backup system. When covers are removed (e.g., an enclosure lid), live
components can be touched. Touching can result in death or serious injury due to electric shock.
• When carrying out any work on the electrical installation, wear suitable personal protective equipment.
• Switch off or disconnect the following components in the following order:
– Sunny Island
– At the grid-connection point, the circuit breaker of the battery-backup system
– In the automatic transfer switch, all circuit breakers
– Load-break switch of the battery
• Ensure that the battery-backup system cannot be reconnected.
• Open the enclosure lid on the Sunny Island inverter and ensure that it is dead.
• Ground and short-circuit the AC conductors outside the automatic transfer switch.
• Cover or isolate any adjacent live components.
Danger to life from electric shock due to damaged components
Operating a damaged device can lead to hazardous situations that can result in death or serious injuries due to electric
shock.
• Only use the battery-backup system when it is technically faultless and in an operationally safe state.
• Ensure that all safety equipment is freely accessible at all times.
• Make sure that all safety equipment is in good working order.
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:$51,1*
Danger to life due to incompatible lithium-ion battery
An incompatible lithium-ion battery can lead to a fire or an explosion. With incompatible lithium-ion batteries, it is not
ensured that the battery management is intrinsically safe and will protect the battery.
• Verify that the battery complies with locally applicable standards and directives and is intrinsically safe.
• Ensure that the lithium-ion batteries are approved for use with the Sunny Island.
The list of lithium-ion batteries approved for the Sunny Island is updated regularly (see the technical information
“List of Approved Lithium-Ion Batteries” at www.SMA-Solar.com).
• If no lithium-ion batteries approved for the Sunny Island can be used, lead-acid batteries can be used.
Danger to life due to explosive gases
Explosive gases may escape from the battery and cause an explosion. This can result in death or serious injury.
• Protect the battery environment from open flames, embers or sparks.
• Install, operate and maintain the battery in accordance with the manufacturer’s specifications.
• Do not heat the battery above the temperature permitted or burn the battery.
• Ensure that the battery room is sufficiently ventilated.
Chemical burns and poisoning due to battery electrolyte
If handled inappropriately, battery electrolyte can cause irritation to the eyes, respiratory system and skin, and it can
be toxic. This may result in blindness and serious chemical burns.
• Protect the battery enclosure against destruction.
• Do not open or deform the battery.
• Whenever working on the battery, wear suitable personal protective equipment such as rubber gloves, an apron,
rubber boots and goggles.
• Rinse acid splashes thoroughly for a long time with clear water, and consult a doctor.
• Install, operate, maintain and dispose of the battery according to the manufacturer’s specifications.
Risk of injury due to short-circuit currents
Short-circuit currents in the battery can cause heat build-up and electric arcs. Burns or eye injuries due to flashes may
result.
• Remove watches, rings and other metal objects.
• Use insulated tools.
• Do not place tools or metal parts on the battery.
&$87,21
Risk of burns due to short-circuit currents on the disconnected Sunny Island
The capacitors at the DC connection input area store energy. After the battery is isolated from the Sunny Island, battery
voltage is still temporarily present at the DC connection. A short circuit at the DC connection can lead to burns and may
damage the Sunny Island inverter.
• Wait 15 minutes before performing any work at the DC connection or on the DC cables. This allows the capacitors
to discharge.
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2 Safety
/05*$&
Damage to three-phase loads during phase coupling
If three-phase loads are connected to a single-phase utility grid with phase coupling, SMA Solar Technology AG
cannot rule out damage to the three-phase loads.
• Ensure that, during phase coupling, only single-phase loads are connected to the battery-backup grid.
Damage to the tie switch due to incorrect design
If the ampacity of the tie switch is not sufficient, the tie switch becomes overloaded and is damaged.
• Adjust the ampacity of the tie switch in accordance with the requirements on site. The tie switch must be designed
for at least the operating range of the upstream fuse or the maximum short-circuit current of the PV system.
Damage to the battery due to incorrect settings
The set battery parameters influence the charging behavior of the Sunny Island inverter. The battery can be damaged
by incorrect settings for the battery type, nominal voltage and capacity parameters.
• Ensure that the values recommended by the manufacturer are set for the battery (refer to the technical data of the
battery in the manufacturer documentation). Note that the battery charging behavior names used by
SMA Solar Technology AG and the battery manufacturer may, in some cases, differ in meaning (for the battery
charging behavior of the Sunny Island inverter, see technical information “Battery Management”).
• Set the battery capacity for a ten-hour electric discharge (C10) The battery manufacturer specifies the battery
capacity in relation to discharge time.
Destruction of devices due to electrostatic discharge (ESD)
If enclosure parts are removed, the devices (e.g., Sunny Island or PV inverter) can be damaged or destroyed if
electronic components or terminals are touched.
• Do not touch any electronic components in open devices.
• Ground yourself before touching any connections.
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3 Information and System Description
3.1 Requirements of the “VDE Forum Network Technology / Network
Operations (FNN)”
The information only applies for systems for which the following properties are all applicable:
• The system stores energy for increased self-consumption.
• Only one Sunny Island is connected in the system.
• The grid operator requires compliance with the technical information “Connection and Operation of Storage Units”
of the FNN. Currently, only the grid operators in Germany require compliance with the above-mentioned technical
information.
In these systems, the Sunny Island must be connected to a line conductor supplied by a single-phase PV inverter. If there
are only three-phase PV inverters connected, the Sunny Island can be connected to any line conductor.
The requirements of the technical information “Connection and Operation of Storage Units in Low-Voltage Networks”
published by the FNN influence the discharge behavior of the Sunny Island inverter. In systems with one Sunny Island
and single-phase PV inverters, the SMA Flexible Storage System reduces the maximum discharge power of the
Sunny Island inverter if necessary (for examples of correct connection of the PV inverters, see quick reference guide
“SMA Flexible Storage System”).
3.2 Requirements of VDE Application Guide 2510-2
The requirements below only apply for systems for which the following properties are all applicable:
• The system is a self-consumption system and/or battery-backup system.
• The system is installed in Germany.
Currently, only the grid operators in Germany require compliance with the above-mentioned Application Guide.
In accordance with the scope of VDE application guide 2510-2, a manufacturer’s system is regarded as a complete
energy storage system only if products are used that have been approved by the manufacturer (for details on the
battery-backup systems of SMA Solar Technology AG, see the planning guidelines “SMA Flexible Storage System with
Battery Backup Function” and the technical information “List of Approved Lithium-Ion Batteries” at www.SMA-Solar.com).
If products are used that have not been approved by SMA Solar Technology AG, the installer is deemed the
manufacturer of the system.
The requirements of VDE application guide 2510-2 are fulfilled if the installation is carried out in accordance with the
technical documentation of the Sunny Island inverter.
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3.3 System Information
Battery-backup systems without increased self-consumption
If you are not increasing the self-consumption of PV energy, the following devices are not required:
• SMA Energy Meter
• Sunny Home Manager
• Sunny Island Speedwire data module
Information on batteries
Lithium-ion batteries in battery-backup systems
In order to meet the requirements of battery-backup systems in the event of grid failure, the Sunny Island has a high
overload capacity. This overload capacity is subject to the battery being able to supply sufficient current. With
lithium-ion batteries, this ampacity cannot be taken for granted.
• Clarify with the battery manufacturer whether the battery is suitable for battery-backup systems with
Sunny Island. In particular, note the ampacity if, in the event of grid failure, the battery-backup grid is supplied
by the Sunny Island.
Recommendations for battery capacity
SMA Solar Technology AG recommends the following minimum battery capacities. The battery capacities apply for
a ten-hour electric discharge (C10).
• Single-phase battery-backup system with SI3.0M-11: 100 Ah
• Single-phase battery-backup system with SI4.4M-11: 100 Ah
• Single-phase battery-backup system with SI6.0H-11: 120 Ah
• Single-phase battery-backup system with SI8.0H-11: 160 Ah
• Three-phase battery-backup system with three SI3.0M-11 devices: 300 Ah
• Three-phase battery-backup system with three SI4.4M-11 devices: 300 Ah
• Three-phase battery-backup system with three SI6.0H-11 devices: 360 Ah
• Three-phase battery-backup system with three SI8.0H-11 devices: 480 Ah
The minimum battery capacity must be observed to ensure stable operation of the system.
Information on the automatic transfer switch
Wiring and connection of automatic transfer switches
• Do not bridge the neutral conductors of connections X1 to X5. If the neutral conductor connections are bridged,
residual-current devices could trip.
• Label the equipment and devices of the automatic transfer switch in accordance with the schematic diagrams.
This makes installation and commissioning easier and simplifies the support process in the event of service.
• Only install an SMA Energy Meter if the systems have increased self-consumption.
Install the SMA Energy Meter in such a way that it can measure the total purchased electricity and grid feed-in.
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Information on the automatic transfer switch
Connection of automatic transfer switches for single-phase battery-backup systems
• With single-phase battery-backup systems, connect circuit breaker F1 and terminal AC2 Gen/Grid L of the
Sunny Island inverter to the same line conductor, e.g., to L1 (for a single-phase battery-backup system with an
all-pole disconnection function see Section 4.1, page 21 / for a single-phase battery-backup system without an
all-pole disconnection function see Section 5.1, page 31). Observe the following:
– Only the line conductor that is connected to circuit breaker F1 of the Sunny Island inverter is monitored for
grid failure.
– After a grid failure, the Sunny Island synchronizes with the line conductor which is connected to circuit
breaker F1 and monitored for grid failure. When terminal AC2 Gen/Grid L of the Sunny Island inverter is
connected to another line conductor, the battery-backup system is not able to synchronize with the utility
grid. As a result, the battery-backup system fails.
• Connect the PV inverter and the Sunny Island to the same line conductor if possible. This way, in the event of
grid failure, the PV inverters are supplied with voltage directly and then can feed in even if phase coupling is
deactivated.
Information on the Sunny Island
Connection of the neutral conductor
At connection AC2, there are two terminals N and NTT for the connection of the neutral conductor.
• In battery-backup systems, at connection AC2, always connect the neutral conductor to terminal NTT.
This ensures that the Sunny Island disconnects at all poles.
Device types within a cluster
All Sunny Island inverters must be of the same device type.
Information on the PV system
Maximum PV system power
In battery-backup systems, the maximum power of the PV system depends on the total power of the Sunny Island.
• Maximum output power of the PV system per SI3.0M-11: 4,600 W
• Maximum output power of the PV system per SI4.4M-11: 4,600 W
• Maximum output power of the PV system per SI6.0H-11: 9,200 W
• Maximum output power of the PV system per SI8.0H-11: 12,000 W
Observance of the maximum output power of the PV system is a requirement for stable operation of the
battery-backup system during a grid failure.
Frequency-dependent control of active power feed-in
In battery-backup systems, the active power of the PV inverters must be controllable depending on the frequency.
• With existing systems, ensure that the PV inverters are controllable depending on the frequency (see planning
guidelines “SMA Flexible Storage System with Battery Backup Function”).
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Information on the communication devices
Requirements for the router and network switches for Speedwire devices
An SMA Flexible Storage System has the following requirements for the communication devices:
• All Speedwire devices must be connected to the same router.
• The router and optionally one or more network switches must fully support Multicast.
• The router must support “Internet Enabled Devices” with the SIP and STUN interfaces.
Most common routers and network switches support Multicast and “Internet Enabled Devices.”
Electricity supply of communication devices
During a grid failure, only the devices in the battery-backup grid are supplied with current.
• Connect the electricity supply of the Sunny Home Manager, router and the optional network switches to the
battery-backup grid.
The Sunny Home Manager does not support wind power inverters or CHP plants
The Sunny Home Manager only supports PV inverters. If your system combines various AC power sources (e.g., PV
system and small wind turbine system), the Sunny Home Manager can only detect the PV inverters and limit their
power. In the Sunny Home Manager system, no wind power inverters or CHP plants are displayed in Sunny Portal.
Since the data from wind power inverters or CHP plants is not taken into account by the Sunny Home Manager, the
data calculated in Sunny Portal and the displayed diagrams may be inaccurate. However, you have the option of
displaying the wind power inverters via the Sunny Explorer software and configuring them if necessary (see Sunny
Explorer documentation).
Information on operating conditions
Use in Belgium: connection to the utility grid (AC)
The utility grid connected to the automatic transfer switch must generally be a TN or TT system. In Belgium, the utility
grid can be designed to function as an IT system that is, however, grounded to the neutral point of the source.
This results in a hybrid form of an IT and TT system. Compared with a TT system, this hybrid form is not equipped with
a neutral conductor. With this installation, the following restriction applies when using the battery-backup system:
• If the utility grid functions as an IT system that is grounded to the neutral point of the source, the connected
battery-backup system must be single-phase.
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3.4 Design and Functions of the Battery-Backup System
Figure 1:
Block circuit diagram of a single-phase battery-backup system
In the event of grid failure, a battery-backup system with Sunny Island supplies loads with energy and a grid-tie PV system
with voltage. In the event of grid failure, an automatic transfer switch disconnects the battery-backup grid from the utility
grid. After disconnection, the loads and the PV system are not supplied for approximately five to seven seconds. The
battery-backup system can then provide active power and reactive power again. The battery-backup system supplies the
loads, and the PV system can synchronize with the battery-backup grid and feed in.
When the utility grid is available again, the battery-backup system synchronizes the battery-backup grid with the utility
grid. Following successful synchronization, the automatic transfer switch connects the battery-backup grid to the utility
grid. If the automatic transfer switch is connected to the utility grid, the battery-backup system uses the battery for
increased self-consumption.
You can set up and wire the automatic transfer switch yourself or acquire it pre-wired from another provider (see planning
guidelines “SMA Flexible Storage System with Battery Backup Function” at www.SMA-Solar.com).
Connection of loads and the PV system
The automatic transfer switch is not a distribution board for the loads or the PV system. You must also install the
necessary protective devices for the loads and the PV system.
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3.5 Design and Functions of the Automatic Transfer Switch
3.5.1
Figure 2:
Devices of the Automatic Transfer Switch
Schematic diagram of a single-phase automatic transfer switch with all-pole disconnection (Example)
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An automatic transfer switch provides the following functions:
• Grid disconnection isolates the battery-backup grid from the utility grid.
• The grounding device grounds the battery-backup grid after it has been disconnected from the utility grid.
The grounding device is only required in systems with all-pole disconnection.
• The phase coupling connects the line conductors of the battery-backup system to a single-phase distribution grid.
The phase coupling is a function for single-phase battery-backup systems if the installation of the battery-backup grid
is three-phase.
• The SMA Energy Meter measures the grid feed-in and the purchased electricity.
The SMA Energy Meter is only required in systems for increased self-consumption.
3.5.2
Grid Disconnection
Within the automatic transfer switch, a tie switch disconnects the battery-backup grid from the utility grid. The conditions
at the tie switch differ depending on the installation site. SMA Solar Technology AG offers two basic structures for grid
disconnection, which differ as far as the tie switch is concerned:
• Grid disconnection with all-pole disconnection of the battery-backup grid from the utility grid
In the event of grid failure, a tie switch disconnects all line conductors and the neutral conductor from the utility grid.
If the technical connection requirements of the grid operator or the local standards and directives call for or allow
all-pole disconnection, you must install this basic structure. You must install all-pole disconnection in the following
countries:
– Belgium
– Denmark
– Germany
– Austria
– Switzerland
• Grid disconnection without all-pole disconnection of the battery-backup grid from the utility grid
In the event of grid failure, a tie switch disconnects all line conductors from the utility grid. The neutral conductor of
the battery-backup grid remains permanently connected to the utility grid. If the technical connection requirements
of the grid operator or the local standards and directives prohibit disconnection of the neutral conductor, you must
install this basic structure.
Independent of the basic structure, you must adjust the ampacity of the tie switch in accordance with the requirements on
site. The tie switch must be designed for at least the operating range of the upstream fuse or the maximum short-circuit
current of the PV system.
The circuitry of the automatic transfer switch is designed in such a way that the tie switch disconnects only in the event of
a grid failure. If you stop or switch off the Sunny Island, the battery-backup grid remains connected to the utility grid.
This means that you can carry out maintenance work on the battery without the supply to the loads being interrupted.
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Circuit description of the tie switch with all-pole disconnection*
The tie switch with all-pole disconnection comprises contactors Q1 and Q2. The tie switch disconnects the battery-backup
grid from the utility grid in the event of grid failure or if the utility grid has breached the thresholds for voltage and
frequency.
The control voltage of contactors Q1, Q2 and Q3 is equal to the voltage of a line conductor of the utility grid. This means
that the tie switch can only be activated when grid voltage is present. An auxiliary contact of contactor Q3 locks contactor
Q1. Contactors Q3 and Q2 are controlled by multifunction relay Relay1 of the Sunny Island inverter. If multifunction
relay Relay1 is in non-operative mode, contactors Q2 and Q3 activate. If contactor Q3 is in non-operative mode,
contactor Q1 will also go into non-operative mode and be locked.
In the event of a total grid failure, contactors Q1, Q2 and Q3 go into non-operative mode due to the lack of control
voltage and they disconnect the battery-backup grid with all poles from the utility grid. The Sunny Island also measures
the voltage of the utility grid. For this, the Sunny Island is connected with the same line conductor as the control voltage
of contactors Q1, Q2 and Q3. When a deviation from country-specific voltage and frequency thresholds of the utility
grid occurs, multifunction relay Relay 1 is activated. Contactors Q1, Q2 and Q3 remain in non-operative mode or go
into non-operative mode.
When the utility grid is available again, the Sunny Island detects this. The Sunny Island synchronizes the battery-backup
grid with the utility grid. Following successful synchronization, multifunction relay Relay1 goes into non-operative mode
and contactors Q2 and Q3 are activated. Contactor Q3 unlocks contactor Q1, and Q1 is activated. The battery-backup
grid is again connected to the utility grid.
Circuit description of the tie switch without all-pole disconnection**
The tie switch without all-pole disconnection consists of contactor Q2 (see Section 5.1.1 "Schematic Diagram of the
Automatic Transfer Switch", page 31). The tie switch disconnects the battery-backup grid from the utility grid in the event
of grid failure or if the utility grid has breached the thresholds for voltage and frequency.
The control voltage of contactor Q2 is the voltage at line conductor L1 of the utility grid. This means that the tie switch
can only be activated when grid voltage is present. Contactor Q2 is controlled by multifunction relay Relay1 of the
Sunny Island inverter. If multifunction relay Relay1 is in non-operative mode, contactor Q2 activates.
In the event of a total grid failure, contactor Q2 goes into non-operative mode due to the lack of control voltage and
disconnects the battery-backup grid from the line conductors of the utility grid. The Sunny Island also measures the voltage
of the utility grid. For this, the Sunny Island is connected with the same line conductor as the control voltage of contactor
Q2. When a deviation from the country-specific voltage and frequency thresholds of the utility grid occurs, multifunction
relay Relay 1 is activated. Contactor Q2 remains in non-operative mode or goes into non-operative mode.
When the utility grid is available again, the Sunny Island detects this. The Sunny Island synchronizes the battery-backup
grid with the utility grid. Following successful synchronization, multifunction relay Relay1 goes into non-operative mode
and contactor Q2 activates. The battery-backup grid is again connected to the utility grid.
* The explanation is based on a single-phase battery-backup system with one Sunny Island. Three-phase battery-backup systems behave in a
similar manner.
** The explanation is based on a single-phase battery-backup system with one Sunny Island. Three-phase battery-backup systems behave in a
similar manner.
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3.5.3
SMA Solar Technology AG
Grounding Device for the Battery-Backup Grid
With TN and TT systems, the neutral conductor must be grounded for protection in the case of indirect contact with live
components. Grounding in the utility grid is usually achieved at the local grid transformer.
In automatic transfer switches with all-pole disconnection, all poles of the battery-backup grid are disconnected from the
utility grid in the event of grid failure. As a result of the disconnection, the neutral conductor in the battery-backup grid is
not grounded. Therefore, in automatic transfer switches with all-pole disconnection, a grounding device must ground the
neutral conductor in the event of grid failure. The grounding device enables the required protection in the event of indirect
contact with live components. The grounding device is set up for fail-safe operation.
If the neutral conductor of the battery-backup grid is connected to the utility grid, there must be no further grounding in
the battery-backup grid. The grounding device therefore disconnects the connection between the neutral conductor and
ground if the automatic transfer switch connects the battery-backup grid to the utility grid.
Circuit description of the grounding device
Contactors Q3 and Q4 form the grounding device (see Section 4.1 "Single-Phase Battery-Backup System", page 21).
Contactors Q3 and Q4 are controlled by the two multifunction relays of the Sunny Island inverter. Triggering of contactor
Q3 occurs simultaneously with contactor Q2 of the tie switch. If contactor Q2 deactivates and the tie switch opens,
contactor Q3 connects the neutral conductor in the battery-backup grid to the grounding conductor. In addition, the
Sunny Island uses multifunction relay Relay 2 to control contactor Q4. When multifunction relay Relay 2 is activated,
contactor Q4 is activated and also connects the neutral conductor to the grounding conductor. This arrangement ensures
that the neutral conductor of the battery-backup grid is always connected to ground.
3.5.4
Phase Coupling for Single-Phase Battery-Backup Systems
In single-phase battery-backup systems, in the event of grid failure, the battery-backup grid is single-phase. If the
installation of the battery-backup grid is three-phase, only one part of the loads can continue to be supplied.
Phase coupling enables combination of the line conductors in the battery-backup grid. As a result, the other two line
conductors are also supplied with voltage. This means that, in the event of grid failure, a three-phase battery-backup grid
becomes a single-phase distribution grid.
Phase coupling can be switched on independently for the other line conductors. Phase coupling is only suitable for
battery-backup grids with single-phase PV inverters and single-phase loads.
Circuit description of the phase coupling
Contactor Q6 is the phase coupler. If multifunction relay Relay2 activates on the Sunny Island, contactor Q6 activates
and connects the unsupplied line conductors via circuit breakers F3 and F4 with the supplied line conductor.
In the event of grid failure, the line conductor that is connected with the Sunny Island is supplied with voltage first. Then
the phase coupling combines the two other line conductors. When the utility grid is available again, the phase coupling
disconnects the combined line conductors. Only the line conductor that is connected to the Sunny Island is not interrupted
on connection to the utility grid.
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4 Battery-Backup Systems With All-Pole Disconnection
4 Battery-Backup Systems With All-Pole Disconnection
4.1 Single-Phase Battery-Backup System
4.1.1
Figure 3:
Schematic Diagram of the Automatic Transfer Switch
Schematic diagram of the single-phase automatic transfer switch with all-pole disconnection
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4 Battery-Backup Systems With All-Pole Disconnection
4.1.2
Figure 4:
22
SMA Solar Technology AG
Circuitry Overview
Connection of the automatic transfer switch with all-pole disconnection (e.g., for Germany)
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4.1.3
Figure 5:
4 Battery-Backup Systems With All-Pole Disconnection
Connecting the Sunny Island Inverter
Connecting the Sunny Island inverter
Position
Designation
Description / information
A
Cable for the control voltage Sunny Island: connection AC1 Loads/SunnyBoys terminals L and N
Automatic transfer switch: connection X5 terminals L and N
Conductor cross-section: 2.5 mm² to 16 mm²
B
AC power cable
Sunny Island: connection AC2 Gen/Grid terminals L, NTT and PE
Automatic transfer switch: connection X3 terminals L1, N and PE
Conductor cross-section: 10 mm² to 16 mm²
C
Measuring cable for voltage Sunny Island: connection ExtVtg terminals L and N
measurement
Automatic transfer switch: connection X4 terminals L1 and N
Conductor cross-section: 1.5 mm² to 2.5 mm²
D
DC+ cable
Battery connection
E
DC − cable
Conductor cross-section: 50 mm² to 95 mm²
Cable diameter: 14 mm to 25 mm
Torque: 12 Nm
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4 Battery-Backup Systems With All-Pole Disconnection
Position
Designation
Description / information
F
Measuring cable of the
battery temperature sensor
Sunny Island: connection BatTmp
SMA Solar Technology AG
You only have to connect a battery temperature sensor if lead-acid batteries
are used.
Mount the battery temperature sensor in the middle of the battery-storage
system, in the upper third of the battery cell.
G
Control cable of the tie
switch
Sunny Island: connection Relay1 terminals C and NC
Automatic transfer switch: connection X4 terminals 1 and 2
If the multifunction relay activates, the contactors of the tie switch deactivate.
Conductor cross-section: 1.5 mm² to 2.5 mm²
H
Control cable of contactors
Q4 and Q6
Sunny Island: connection Relay2 terminals C and NO
Automatic transfer switch: connection X5 terminals 1 and 2
If the multifunction relay activates, the contactors activate.
Conductor cross-section: 1.5 mm² to 2.5 mm²
I
Measuring cable for
monitoring the tie switch
Sunny Island: connections DigIn+ and BatVtgOut+
Automatic transfer switch: connection X5 terminals 3 and 4
Use a separate cable as a measuring cable for monitoring the tie switch.
This will help prevent disturbances during the transmission of signals.
Conductor cross-section: 0.2 mm² to 2.5 mm²
Inside the Sunny Island inverter, connect connections DigIn − and
BatVtgOut − .
K
Data cable to
Sunny Remote Control
Sunny Island: connection Display
L
Speedwire network cable
Sunny Island: connection ComETH
In order to connect the router/network switch, the Speedwire data module
Sunny Island must be mounted in the Sunny Island (see Sunny Island
Speedwire data module installation manual). Connection ComETH is on the
data module.
M
24
Data cable for battery
management
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Sunny Island: connection ComSync In
A data cable must be connected to the battery only when lithium-ion
batteries are used. The communication bus must be equipped with a
terminator on both ends.
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4 Battery-Backup Systems With All-Pole Disconnection
4.2 Three-Phase Battery-Backup System
4.2.1
Figure 6:
Schematic Diagram of the Automatic Transfer Switch
Schematic diagram of the three-phase automatic transfer switch with all-pole disconnection
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4 Battery-Backup Systems With All-Pole Disconnection
4.2.2
Figure 7:
26
SMA Solar Technology AG
Circuitry Overview
Connection of the automatic transfer switch with all-pole disconnection (e.g., for Germany)
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4.2.3
Figure 8:
4 Battery-Backup Systems With All-Pole Disconnection
Connecting the Master
Connecting the master
Position
Designation
Description / information
A
Cable for the control voltage Sunny Island: connection AC1 Loads/SunnyBoys terminals L and N
Automatic transfer switch: connection X5 terminals L and N
Conductor cross-section: 2.5 mm² to 16 mm²
B
AC power cable
Sunny Island: connection AC2 Gen/Grid terminals L, NTT and PE
Automatic transfer switch: connection X3 terminals L1, N and PE
Conductor cross-section: 10 mm² to 16 mm²
C
Measuring cable for voltage Sunny Island: connection ExtVtg terminals L and N
measurement
Automatic transfer switch: connection X4 terminals L1 and N
Conductor cross-section: 1.5 mm² to 2.5 mm²
D
DC+ cable
Battery connection
E
DC − cable
Conductor cross-section: 50 mm² to 95 mm²
Cable diameter: 14 mm to 25 mm
Torque: 12 Nm
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4 Battery-Backup Systems With All-Pole Disconnection
Position
Designation
Description / information
F
Measuring cable of the
battery temperature sensor
Sunny Island: connection BatTmp
SMA Solar Technology AG
You only have to connect a battery temperature sensor if lead-acid
batteries are used.
Mount the battery temperature sensor in the middle of the battery-storage
system, in the upper third of the battery cell.
G
Control cable of the tie
switch
Sunny Island: connection Relay1 terminals C and NC
Automatic transfer switch: connection X4 terminals 1 and 2
If the multifunction relay activates, the contactors of the tie switch
deactivate.
Conductor cross-section: 1.5 mm² to 2.5 mm²
H
Control cable of contactor
Q4
Sunny Island: connection Relay2 terminals C and NO
Automatic transfer switch: connection X5 terminals 1 and 2
If the multifunction relay activates, contactor Q4 activates.
Conductor cross-section: 1.5 mm² to 2.5 mm²
I
Measuring cable for
monitoring the tie switch
Sunny Island: connections DigIn+ and BatVtgOut+
Automatic transfer switch: connection X5 terminals 3 and 4
Use a separate cable as a measuring cable for monitoring the tie switch.
This will help prevent disturbances during the transmission of signals.
Conductor cross-section: 0.2 mm² to 2.5 mm²
Inside the Sunny Island inverter, connect connections DigIn − and
BatVtgOut − .
K
Data cable to
Sunny Remote Control
Sunny Island: connection Display
L
Speedwire network cable
Sunny Island: connection ComETH
In order to connect the router/network switch, the Speedwire data module
Sunny Island must be mounted in the Sunny Island (see Sunny Island
Speedwire data module installation manual). Connection ComETH is on
the data module.
M
N
28
Data cable for battery
management
Sunny Island: connection ComSync In
A data cable must be connected to the battery only when lithium-ion
batteries are used. The communication bus must be equipped with a
terminator on both ends.
Data cable for the internal
Sunny Island: connection ComSync Out
communication in the cluster Connection of internal communication bus of slave 1
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SMA Solar Technology AG
4.2.4
Figure 9:
4 Battery-Backup Systems With All-Pole Disconnection
Connecting the Slaves
Connecting the slaves
Position Designation
Description / information
A
Sunny Island: connection AC2 Gen/Grid terminals L, NTT and PE
AC power cable
Automatic transfer switch:
Connect slave 1 to X3 terminals L2, N and PE.
Connect slave 2 to X3, terminals L3, N and PE.
Conductor cross-section: 10 mm² to 16 mm²
B
Measuring cable for voltage Sunny Island: connection ExtVtg terminals L and N
measurement
Automatic transfer switch:
Connect slave 1 to X4 terminals L2 and N.
Connect slave 2 to X4 terminals L3 and N.
Conductor cross-section: 1.5 mm² to 2.5 mm²
C
DC+ cable
Battery connection
D
DC − cable
Conductor cross-section: 50 mm² to 95 mm²
Cable diameter: 14 mm to 25 mm
Torque: 12 Nm
E
Data cable for the internal
Sunny Island: connection ComSync In
communication in the cluster With slave 1: connection of internal communication bus of the master
With slave 2: connection of internal communication bus of slave 1
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4 Battery-Backup Systems With All-Pole Disconnection
Position Designation
F
SMA Solar Technology AG
Description / information
Data cable for the internal
Sunny Island: connection ComSync Out
communication in the cluster With slave 1: connection of internal communication bus after slave 2
With slave 2: leave terminator plugged in. Slave 2 is connected to slave 1
only.
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5 Battery-Backup Systems Without All-Pole Disconnection
5 Battery-Backup Systems Without All-Pole Disconnection
5.1 Single-Phase Battery-Backup System
5.1.1
Schematic Diagram of the Automatic Transfer Switch
Figure 10: Schematic diagram of the single-phase automatic transfer switch without all-pole disconnection
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5 Battery-Backup Systems Without All-Pole Disconnection
5.1.2
SMA Solar Technology AG
Circuitry Overview
Figure 11: Connection of the automatic transfer switch without all-pole disconnection
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5.1.3
5 Battery-Backup Systems Without All-Pole Disconnection
Connecting the Sunny Island Inverter
Figure 12: Connecting the Sunny Island inverter
Position
Designation
Description / information
A
Cable for the control voltage Sunny Island: connection AC1 Loads/SunnyBoys terminals L and N
Automatic transfer switch: connection X5 terminals L and N
This cable is only required for phase coupling.
Conductor cross-section: 2.5 mm² to 16 mm²
B
AC power cable
Sunny Island: connection AC2 Gen/Grid terminals L, NTT and PE
Automatic transfer switch: connection X3 terminals L1, N and PE
Conductor cross-section: 10 mm² to 16 mm²
C
Measuring cable for voltage Sunny Island: connection ExtVtg terminals L and N
measurement
Automatic transfer switch: connection X4 terminals L1 and N
Conductor cross-section: 1.5 mm² to 2.5 mm²
D
DC+ cable
Battery connection
E
DC − cable
Conductor cross-section: 50 mm² to 95 mm²
Cable diameter: 14 mm to 25 mm
Torque: 12 Nm
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5 Battery-Backup Systems Without All-Pole Disconnection
Position
Designation
Description / information
F
Measuring cable of the
battery temperature sensor
Sunny Island: connection BatTmp
G
Control cable of the tie
switch
SMA Solar Technology AG
You only have to connect a battery temperature sensor if lead-acid batteries
are used.
Mount the battery temperature sensor in the middle of the battery-storage
system, in the upper third of the battery cell.
Sunny Island: connection Relay1 terminals C and NC
Automatic transfer switch: connection X4 terminals 1 and 2
If the multifunction relay activates, the contactor of the tie switch deactivates.
Conductor cross-section: 1.5 mm² to 2.5 mm²
H
Control cable of contactor
Q6
Sunny Island: connection Relay2 terminals C and NO
Automatic transfer switch: connection X5 terminals 1 and 2
If the multifunction relay activates, the contactor activates. This cable is only
required for phase coupling.
Conductor cross-section: 1.5 mm² to 2.5 mm²
I
Measuring cable for
monitoring the tie switch
Sunny Island: connections DigIn+ and BatVtgOut+
Automatic transfer switch: connection X5 terminals 3 and 4
Use a separate cable as a measuring cable for monitoring the tie switch.
This will help prevent disturbances during the transmission of signals.
Conductor cross-section: 0.2 mm² to 2.5 mm²
Inside the Sunny Island inverter, connect connections DigIn − and
BatVtgOut − .
K
Data cable to
Sunny Remote Control
Sunny Island: connection Display
L
Speedwire network cable
Sunny Island: connection ComETH
In order to connect the router/network switch, the Speedwire data module
Sunny Island must be mounted in the Sunny Island (see Sunny Island
Speedwire data module installation manual). Connection ComETH is on the
data module.
M
34
Data cable for battery
management
Ersatzstrom-IS-en-33
Sunny Island: connection ComSync In
A data cable must be connected to the battery only when lithium-ion
batteries are used. The communication bus must be equipped with a
terminator on both ends.
Installation - Quick Reference Guide
SMA Solar Technology AG
5 Battery-Backup Systems Without All-Pole Disconnection
5.2 Three-Phase Battery-Backup System
5.2.1
Schematic Diagram of the Automatic Transfer Switch
Figure 13: Schematic diagram of the three-phase automatic transfer switch without all-pole disconnection
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5 Battery-Backup Systems Without All-Pole Disconnection
5.2.2
SMA Solar Technology AG
Circuitry Overview
Figure 14: Connection of the automatic transfer switch
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5.2.3
5 Battery-Backup Systems Without All-Pole Disconnection
Connecting the Master
Figure 15: Connecting the master
Position
Designation
Description / information
A
AC power cable
Sunny Island: connection AC2 Gen/Grid terminals L, NTT and
PE
Automatic transfer switch: connection X3 terminals L1, N and
PE
Conductor cross-section: 10 mm² to 16 mm²
B
Measuring cable for voltage
measurement
Sunny Island: connection ExtVtg terminals L and N
Automatic transfer switch: connection X4 terminals L1 and N
Conductor cross-section: 1.5 mm² to 2.5 mm²
C
DC+ cable
Battery connection
D
DC − cable
Conductor cross-section: 50 mm² to 95 mm²
Cable diameter: 14 mm to 25 mm
Torque: 12 Nm
E
Measuring cable of the battery
temperature sensor
Installation - Quick Reference Guide
Sunny Island: connection BatTmp
You only have to connect a battery temperature sensor if
lead-acid batteries are used.
Mount the battery temperature sensor in the middle of the
battery-storage system, in the upper third of the battery cell.
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5 Battery-Backup Systems Without All-Pole Disconnection
SMA Solar Technology AG
Position
Designation
Description / information
F
Control cable of the tie switch
Sunny Island: connection Relay1 terminals C and NC
Automatic transfer switch: connection X4 terminals 1 and 2
If the multifunction relay activates, the contactor of the tie switch
deactivates.
Conductor cross-section: 1.5 mm² to 2.5 mm²
G
Measuring cable for monitoring the tie Sunny Island: connections DigIn+ and BatVtgOut+
switch
Automatic transfer switch: connection X5 terminals 3 and 4
Use a separate cable as a measuring cable for monitoring the
tie switch. This will help prevent disturbances during the
transmission of signals.
Conductor cross-section: 0.2 mm² to 2.5 mm²
Inside the Sunny Island inverter, connect connections DigIn −
and BatVtgOut − .
I
Data cable to Sunny Remote Control
Sunny Island: connection Display
K
Speedwire network cable
Sunny Island: connection ComETH
In order to connect the router/network switch, the Speedwire
data module Sunny Island must be mounted in the Sunny Island
(see Sunny Island Speedwire data module installation manual).
Connection ComETH is on the data module.
L
Data cable for battery management
Sunny Island: connection ComSync In
A data cable must be connected to the battery only when
lithium-ion batteries are used. The communication bus must be
equipped with a terminator on both ends.
If no data cable is plugged in, plug the terminator into
ComSync In.
M
38
Data cable for the internal
communication in the cluster
Ersatzstrom-IS-en-33
Sunny Island: connection ComSync Out
Installation - Quick Reference Guide
SMA Solar Technology AG
5.2.4
5 Battery-Backup Systems Without All-Pole Disconnection
Connecting the Slaves
Figure 16: Connecting the slaves
Position
Designation
Description / information
A
AC power cable
Sunny Island: connection AC2 Gen/Grid terminals L, NTT and PE
Automatic transfer switch: Connect slave 1 to X3 terminals L2, N and PE.
Connect slave 2 to X3, terminals L3, N and PE.
Conductor cross-section: 10 mm² to 16 mm²
B
Measuring cable for voltage Sunny Island: connection ExtVtg terminals L and N
measurement
Automatic transfer switch: connect slave 1 to X4 terminals L2 and N.
Connect slave 2 to X4 terminals L3 and N.
Conductor cross-section: 1.5 mm² to 2.5 mm²
C
DC+ cable
Battery connection
D
DC − cable
Conductor cross-section: 50 mm² to 95 mm²
Cable diameter: 14 mm to 25 mm
Torque: 12 Nm
E
Data cable for the internal
Sunny Island: connection ComSync In
communication in the cluster
F
Data cable for the internal
Sunny Island: connection ComSync Out
communication in the cluster With slave 2, leave terminator plugged in. Slave 2 is connected to slave 1
only.
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6 Connecting the Sunny Home Manager
SMA Solar Technology AG
6 Connecting the Sunny Home Manager
Figure 17: Connection of the Sunny Home Manager in systems with an SMA Energy Meter
Requirements:
☐ All Speedwire devices must be connected to the same router.
☐ The router and optionally the network switch must fully support Multicast.
☐ The router must support “Internet Enabled Devices” with the SIP and STUN interfaces.
Most common routers and network switches support Multicast and “Internet Enabled Devices.”
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7 Commissioning
7 Commissioning
7.1 Basic Configuration of the Sunny Island Inverter
/05*$&
Damage to the battery due to incorrect settings
The set battery parameters influence the charging behavior of the Sunny Island inverter. The battery can be damaged
by incorrect settings for the battery type, nominal voltage and capacity parameters.
• Ensure that the values recommended by the manufacturer are set for the battery (refer to the technical data of the
battery in the manufacturer documentation). Note that the battery charging behavior names used by
SMA Solar Technology AG and the battery manufacturer may, in some cases, differ in meaning (for the battery
charging behavior of the Sunny Island inverter, see technical information “Battery Management”).
• Set the battery capacity for a ten-hour electric discharge (C10) The battery manufacturer specifies the battery
capacity in relation to discharge time.
Requirements:
☐ With a three-phase system, the Sunny Remote Control must be connected to the master. The master is thus defined
during basic configuration.
☐ In the automatic transfer switch, all circuit breakers must be open. This means that the Sunny Island is not connected
to any PV inverter.
Procedure:
Check the wiring
(see the Sunny Island inverter installation manual).
Close all devices except the BatFuse.
This protects all live components from being touched.
Close the BatFuse and switch on all Sunny Island inverters:
In systems with one Sunny Island, press the “On” button.
For systems with three Sunny Island inverters, press and hold the “On” button on the master until an acoustic signal
sounds.
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When the Sunny Remote Control shows <Init System>,
press and hold the button on the Sunny Remote Control.
☑ An acoustic signal sounds three times and the
Sunny Remote Control displays the
quick configuration guide.
Turn the button on the Sunny Remote Control and select
New System.
Press the button. This confirms your selection of New System.
☑ An entry confirmation prompt appears.
Set Y and press the button.
Set the date.
Set the time.
Set OnGrid.
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Set the battery type.
LiIon_Ext-BMS: Lithium-ion battery
Set the battery capacity for ten-hour electric discharge
(for determining the battery capacity, see the Sunny Island
inverter installation manual).
VRLA: Lead-acid battery with electrolyte absorbed in glass
mat or immobilized in gel
FLA: Lead-acid battery with liquid electrolyte
Set the nominal voltage of the battery.
Set the battery capacity for ten-hour electric discharge
(for determining the battery capacity, see the Sunny Island
inverter installation manual).
Also, during the first ten operating hours,
set the country data set:
AR-N4105: configuration in accordance with application rule VDE-AR-N 4105
Set increased self-consumption:
BackupOnly: system without increased self-consumption
SelfConsBackup: system with increased self-consumption
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Set the number of Sunny Island inverters in the system:
1Phase: system with one Sunny Island
If the system optimizes self-consumption
(SelfConsBackup),
set the type of feed-in of the PV system (see Section 3.1,
page 12).
Asymmetric: The
Symmetric: Either the
installation site is located in installation site is located
Germany and at least one PV outside of Germany or all PV
inverter feeds in
inverters feed in
asymmetrically on a single symmetrically on three line
line conductor.
conductors.
Set the line conductor
to which the
Sunny Island
is connected:
Confirm the basic
configuration
with Y.
3Phase: system with three
Sunny Island inverters
If the system does not
optimize self-consumption
(BackupOnly), confirm the
basic configuration with Y.
Confirm the basic
configuration with Y.
Wait until the upper LED
(inverter LED) on slave 1 is
flashing and the Sunny
Remote Control is displaying
To identify Slave1, press
Tss on the Slv.
Press the start-stop button on
slave 1.
L1: connection to line
conductor L1
L2: connection to line
conductor L2
L3: connection to line
conductor L3
Confirm the basic
configuration with Y.
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Wait until the upper LED
(inverter LED) on slave 2 is
flashing and the Sunny
Remote Control is displaying
To identify Slave2, press
Tss on the Slv.
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SMA Solar Technology AG
7 Commissioning
☑ The basic configuration is complete.
If an SD memory card is inserted in the Sunny Remote Control, the message
Do not remove MMC/SD memory card ... appears.
Close circuit breaker F1 and residual-current device F2 in the distribution board, and leave the Sunny Island switched
on, but do not start it.
7.2 Testing the Automatic Transfer Switch Function
:$51,1*
Danger to life from electric shock due to live voltage
During the test, high voltages are present in the automatic transfer switch. Touching live components can result in death
or serious injury.
• Ensure that you do not touch any live components while measuring and testing.
• Disconnect the automatic transfer switch from voltage sources while you are eliminating any faults.
The sequence of the test applies to all types of automatic transfer switches and is independent of the automatic transfer
switch installed. Ignore tests for non-existent devices.
Requirements:
☐ In the automatic transfer switch, all circuit breakers, F1 and F3 to F6, must be open.
☐ The residual-current devices F2 and F7 must be closed.
☐ All Sunny Island inverters must be switched on but not operational.
☐ PV system and all loads at connection X2 must be disconnected from voltage sources.
Procedure:
1. Open the automatic transfer switch and ensure that there is voltage present and a right-hand rotating magnetic field
at connection X1.
2. Measure whether the individual terminals are voltage-free:
Test point
Task
Connection X2
If AC voltage is present, correctly wire contactors Q1 and Q2.
Connection X3
If AC voltage is present, stop the Sunny Island.
Connection X4
If AC voltage is present, correctly wire circuit breaker F1.
Connection X5,
terminals L1, N, 1 and 2
If AC voltage is present, stop the Sunny Island.
Connection X5,
terminals 3 and 4
If DC voltage is present, correctly wire contactor or auxiliary contact Q2.
3. Check whether the grounding device is correctly wired:
Test point
Task
Contactors Q3 and Q4
Ensure that the wiring is correct.
Connection X2,
terminals N and PE
Ensure that no voltage is present between the terminals and that conductivity
can be measured.
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4. Close circuit breaker F1 and check the following:
Test point
Task
Contactors Q1, Q2 and Q3
Check whether the contactors activate and whether there is voltage present and
a right-hand rotating magnetic field at connection X2.
Connection X2
If the contactors do not activate or no voltage is present at connection X2,
ensure the following:
• At the master, ensure that the control cable is correctly connected to
connections Relay1 C and Relay1 NC.
• Ensure that, in the automatic transfer switch, contactors Q1, Q2 and Q3
are correctly wired.
5. Close circuit breaker F6.
☑ Voltages are present at connection X3.
6. Check whether the residual-current devices trip correctly and are correctly wired:
Test point
Task
Residual-current device F7
Press the test button and measure whether there is voltage present at connection
X3.
If voltage is present, correctly wire residual-current device F7.
Switch on residual-current device F7 again.
Residual-current device F2
Press the test button and check if contactors Q1, Q2 and Q3 go into
non-operative mode.
If the contactors do not deactivate, wire the residual-current device F2 correctly.
Switch on residual-current device F2 again.
7. Start the Sunny Island. Press and hold the button on the Sunny Remote Control until you hear an acoustic signal.
8. Check whether error messages are displayed on the Sunny Remote Control.
If the error message F365 VAcExtPhsFail is displayed, correctly connect connection ExtVtg on the Sunny Island.
9. Close circuit breaker F5 and check whether contactors Q4 and Q6 remain in non-operative mode.
If the contactors activate, correctly wire connections Relay2 C and Relay2 NO on the Sunny Island.
10. Simulate a grid failure. To do this, open circuit breaker F1. As a result, contactors Q1, Q2 and Q3 deactivate.
If the error message F367 ExtCtcNotOpen is displayed, correctly connect connections DigIn and BatVtgOut to
the Sunny Island.
11. Check whether contactors Q4 and Q6 activate approximately five seconds after circuit breaker F1 is opened.
If the contactors do not activate, correctly wire the control cables of the contactors and correctly connect connections
Relay2 C and Relay2 NO to the master.
12. Check whether the grounding device switches correctly.
• Ensure that no voltage is present at connection X2 between terminals N and PE and that conductivity can be
measured.
• Open circuit breaker F5.
• Ensure that no voltage is present at connection X2 between terminals N and PE and that conductivity can be
measured.
• Close circuit breaker F5.
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7 Commissioning
13. Check whether the phase coupling switches correctly. To do this, close circuit breakers F3 and F4 and check the
following:
Test point
Task
Connection X2
Measure if there is voltage present between the line conductors and the neutral
conductor.
If no voltage is present, correctly wire contactor Q6.
Ensure that no voltage is present between the line conductors.
14. Switch on circuit breaker F1.
☑ Contactors Q4 and Q6 deactivate within five minutes, and the tie switch then connects the battery-backup grid to
the utility grid.
7.3 Adjusting the Configuration of the Sunny Island Inverter
7.3.1
Countries in Which the Configuration Must Be Adjusted
In the SMA Flexible Storage System, the Sunny Island inverters are connected to the utility grid and must meet the
requirements of the grid operators. The Sunny Island inverters fulfill the requirements of application guide VDE-AR-N
4105:2011-08. In the Sunny Island, this application guide is defined as standard country data set VDE-AR-4105.
The configuration must be adjusted for the following countries (status: July 2014):
• Denmark (see Section 7.3.2, page 47)
• Austria (see Section 7.3.3, page 48)
• Switzerland (see Section 7.3.4, page 48)
The configuration may only be adjusted on request or with permission of the grid operator in the following countries
(status: July 2014):
• Belgium
Country data set: VDE-AR-4105
• Germany
Country data set: VDE-AR-4105
Use in other countries is possible with the agreement of the grid operator. Consult the grid operator on whether
adjustment is necessary.
7.3.2
Adjusting the Configuration for Denmark
When using the Sunny Island inverter 6.0H / 8.0H in Denmark, you must reduce the discharge/charging current
(default setting: max. 20.0 A).
When using the Sunny Island inverter 3.0M / 4.4M in Denmark, you can retain the default setting of the discharge/
charging current (default setting: max. 16.0 A).
Requirements:
☐ The extended configuration must be performed within the first ten operating hours of the Sunny Island inverter,
otherwise an SMA Grid Guard code is required in order to change grid-relevant parameters (application form for
the SMA Grid Guard code available at www.SMA-Solar.com).
☐ The country data set of the Sunny Island inverter must be set to VDE-AR-4105 (see Section 7.1 "Basic Configuration
of the Sunny Island Inverter", page 41).
Procedure:
1. Log in to the communication product as Installer (see the user manual of the communication product) or switch to
expert mode on the Sunny Remote Control (see the Sunny Island operating manual).
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2. Set parameter Maximum AC battery charging current or 210.03 InvChrgCurMax to 16.0 A.
7.3.3
Adjusting the Configuration for Austria
If your grid operator does not permit frequency-dependent control of active power feed-in in the case of overfrequency,
you must switch off this function (see VDE-AR-N 4105 item 5.7.3.3).
If your grid operator specifies a maximum grid feed-in per line conductor, you must reduce the discharge/charging
current (default setting in the Sunny Island is 20.0 A).
Requirements:
☐ The extended configuration must be performed within the first ten operating hours of the Sunny Island inverter,
otherwise an SMA Grid Guard code is required in order to change grid-relevant parameters (application form for
the SMA Grid Guard code available at www.SMA-Solar.com).
☐ The country data set of the Sunny Island inverter must be set to VDE-AR-4105 (see Section 7.1 "Basic Configuration
of the Sunny Island Inverter", page 41).
Procedure:
1. Log in to the communication product as Installer (see the user manual of the communication product) or switch to
expert mode on the Sunny Remote Control (see the Sunny Island operating manual). If frequency-dependent control
of active power feed-in is not permitted, set parameter Operating mode of active power limitation in the case
of overfrequency P(f) or 232.41 P-WCtLHzMod to Off.
2. If your grid operator specifies a maximum grid feed-in per line conductor, set parameter Maximum AC battery
charging current or 210.03 InvChrgCurMax to the value specified by the grid operator.
7.3.4
Adjusting the Configuration for Switzerland
The following limiting values must be adjusted in order to meet the requirements of the grid operators in Switzerland:
• Maximum power frequency
• The upper frequency difference for valid grid connection
• Minimum observation time for grid voltage and frequency before grid connection
If your grid operator specifies a maximum grid feed-in per line conductor, you must reduce the discharge/charging
current (default setting in the Sunny Island is 20.0 A).
In addition, the label enclosed in the delivery must be affixed to the device to indicate that the Sunny Island is set in
accordance with DIN VDE 0126-1-1.
Requirements:
☐ The extended configuration must be performed within the first ten operating hours of the Sunny Island inverter,
otherwise an SMA Grid Guard code is required in order to change grid-relevant parameters (application form for
the SMA Grid Guard code available at www.SMA-Solar.com).
☐ The country data set of the Sunny Island inverter must be set to VDE-AR-4105 (see Section 7.1 "Basic Configuration
of the Sunny Island Inverter", page 41).
☐ The Sunny Remote Control must be connected to the Sunny Island inverter.
Procedure:
1. Switch to expert mode on the Sunny Remote Control (see the Sunny Island operating manual).
2. Set parameter 232.07 GdFrqMax to 50.2 Hz.
3. Set parameter 232.15 GdFrqMaxDel to 0.05 Hz.
4. Set parameter 232.08 GdVldTm to 30 s.
5. If your grid operator specifies a maximum grid feed-in per line conductor, set parameter 210.03 InvChrgCurMax
to the value specified by the grid operator.
6. Attach the label “VDE 0126-1-1” next to the type label of the Sunny Island inverter.
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7.4 Adjusting the Configuration of the PV Inverters
Countries in which the configuration should be adjusted
In battery-backup systems, the active power of the PV inverters should be controllable depending on the frequency
(see the planning guidelines “SMA Flexible Storage System with Battery Backup Function”). If your grid operator
prohibits control of active power feed-in in the case of overfrequency, you can also use the PV inverters without changing
the configuration. SMA Solar Technology AG recommends activating the frequency-dependent control of the PV
inverters.
Country
Does the current country data set valid for the site include frequency-dependent
control?
Belgium
Yes
Denmark
Yes
Germany
Yes
Austria
No
Switzerland
No
Activating frequency-dependent control of active power
Requirements:
☐ The PV inverters are part of a battery-backup system and the automatic transfer switch can disconnect the PV inverters
from the utility grid.
☐ Adjustment must be coordinated with the grid operator.
☐ You must be authorized to change Grid Guard parameters. You can find the application form at
www.SMA-Solar.com in the download area of the relevant PV inverter.
☐ The firmware version of the PV inverters must support the frequency-dependent control of active power
(for “PV inverters,” see the planning guidelines “SMA Flexible Storage System with Battery Backup Function” at
www.SMA-Solar.com).
Procedure:
1. With existing PV systems, make sure that the firmware of the installed PV inverters supports frequency-dependent
active power control (see the planning guidelines “SMA Flexible Storage System with Battery Backup Function” at
www.SMA-Solar.com).
2. Set the following parameters of the PV inverters to the specified value (see the documentation of the communication
product).
Parameters
Values for the application guide
VDE-AR-N 4105:2011-08**
P-WCtlHzMod
On or WCtlHz
Operating mode of active power limitation in the case of overfrequency
P(f)*
P-WGra
40
Active power gradient, linear instantaneous power gradient
configuration*
P-HzStr
0.2
Difference between starting frequency and power frequency, linear
instantaneous power gradient configuration*
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Parameters
Values for the application guide
VDE-AR-N 4105:2011-08**
P-HzStop
0.2
Difference between reset frequency and power frequency, linear
instantaneous power gradient configuration*
P-HzStopWGra
10
Active power gradient after reset frequency, linear instantaneous power
gradient configuration*
* Menu Equipment & device control system
** The adjustments are based on the requirements for PV inverters in Austria and Swiss.
7.5 Attaching the Labels
The warning label for battery-backup systems is included in the scope of delivery of the Sunny Island inverter.
• Attach the warning label “Battery-Backup System” to the AC main distributor from the outside.
7.6 Activating Phase Coupling in Single-Phase Battery-Backup Systems
With phase coupling it is possible, in the event of utility grid failure, to supply loads that are not connected to the line
conductor of the Sunny Island inverter (see Section 3.5.4 "Phase Coupling for Single-Phase Battery-Backup Systems",
page 20). As soon as the utility grid returns, the contactor disconnects the coupled line conductors again. The switchover
times for the loads to the coupled line conductors are longer than to the line conductor of the Sunny Island. The switchover
times are a matter of seconds.
Disconnection of the Sunny Island inverter as a result of overload:
The Sunny Island switches itself off when overloaded. Only activate phase coupling for line conductors whose loads do
not exceed the maximum AC power of the Sunny Island inverter (for technical data, see the Sunny Island inverter
installation manual).
/05*$&
Damage to three-phase loads during phase coupling
If three-phase loads are connected to a single-phase utility grid with phase coupling, SMA Solar Technology AG
cannot rule out damage to the three-phase loads.
• Ensure that, during phase coupling, only single-phase loads are connected to the battery-backup grid.
Procedure:
• In the automatic transfer switch, switch on circuit breaker F3 or F4 or both.
7.7 Commissioning a System With Increased Self-Consumption
7.7.1
Preparing BLUETOOTH Communication
To allow SMA BLUETOOTH devices in the battery-backup system to communicate with each other, all devices must be
set to the same NetID. The NetID is used to distinguish between systems with SMA BLUETOOTH operating in close
proximity to one another.
Procedure:
1. For PV inverters with an integrated BLUETOOTH interface that communicate via Speedwire, set NetID 0
(see PV inverter installation manual). This deactivates communication via BLUETOOTH.
2. Determine the NetID of the BLUETOOTH system.
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7 Commissioning
• Install Sunny Explorer on a computer. Either run the installation file on the CD provided or download free of
charge at www.SMA-Solar.com.
• Determine a free NetID for the BLUETOOTH system using Sunny Explorer (see Sunny Explorer user manual).
• Quit Sunny Explorer. This will ensure that the BLUETOOTH network is set up via the Sunny Home Manager.
3. Set the determined NetID on the Sunny Home Manager and on all devices with an active BLUETOOTH interface
(see documentation of the BLUETOOTH devices). Note that the NetID must not be set to 1 if the
Sunny Home Manager is intended to communicate with more than one BLUETOOTH node.
7.7.2
Commissioning a System with Increased Self-Consumption
Deactivation of the intermediate storage of PV energy during certain charging procedures
To increase the service life of the battery, the system regularly carries out full charges and equalization charges (see
technical information “Battery Management” at www.SMA-Solar.com). During this charging process, the
intermediate storage of PV energy is deactivated and electricity may have to be purchased to perform the full and
equalization charges.
Required data for registration in Sunny Portal:
Device / customer
data
Sunny Home Manager
Required data and explanation
• Serial number (PIC) and registration ID (RID)
Register the new system in Sunny Portal using the PIC and RID.
SMA Energy Meter
• Only when two SMA Energy Meters are installed, note down the serial number and
purpose (e.g., PV production meter) in each case. This way you can identify the energy
meters in the Sunny Portal.
PV inverters
• System password
The PV system password is the same as the device password for the user group
“Installer.” All devices in a PV system must be set to the same password (for user groups
and security concept, see the Sunny Explorer user manual).
The default password is 1111.
• Serial number of the PV inverters
You can uniquely identify the PV inverters in Sunny Portal using the serial number.
• PV array power in kWp
SMA radio-controlled
socket
• The serial number and connected load of each SMA radio-controlled socket
Customer data
• E-mail address
In Sunny Portal, configure the SMA radio-controlled socket in accordance with the
requirements of the connected load. To do so, you require the serial number of the
SMA radio-controlled socket.
• Password for Sunny Portal access
• Address of the PV system
• Electricity tariff data
– Electricity price for purchased electricity
– Tariff times, if applicable (e.g. for tariffs with peak and off-peak tariff)
– Feed-in tariff
– Self-consumption tariff, if applicable
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Requirements:
☐ The basic configuration of the Sunny Island inverter must have been performed (see Section 7.1, page 41).
☐ The functionality of the automatic transfer switch must be checked (see Section 7.2, page 45).
☐ The Sunny Home Manager, the Sunny Island and all other Speedwire devices must be connected to the same router.
☐ DHCP must be enabled for the router of the system.
☐ The router of the system must have an Internet connection.
Procedure:
1. In the distribution board, switch on circuit breaker F1 and residual-current device F2.
2. Commission the PV system (see PV inverter documentation).
3. Press the start-stop button on the Sunny Island and hold it until an
acoustic signal sounds. This starts the system.
4. Only when two SMA Energy Meters are installed in the local network, assign the grid feed-in meter and purchased
electricity meter to the Sunny Island using Sunny Explorer. To do this, enter the serial number of the grid feed-in meter
and purchased electricity meter (see the Sunny Explorer user manual).
5. Open Sunny Portal via www.SunnyPortal.com/Register and run the PV System Setup Assistant. The required data
for registration in Sunny Portal must be at hand.
Representation of the Sunny Island inverters in Sunny Portal
In Sunny Portal, the Sunny Island inverters are always displayed as one device, even if the system consists of
three Sunny Island inverters. If there are three Sunny Island inverters, the data is added together.
6. Activate the automatic update of the Sunny Home Manager and the PV system in Sunny Portal.
7. Only in systems with active power limitation, ensure that the limitation of the active power feed-in is configured and
functioning in Sunny Portal (“Configuring Active Power Feed-In Limitation,” see the User Manual
“Sunny Home Manager in Sunny Portal” at www.SunnyPortal.com).
7.8 Commissioning a System without Increased Self-Consumption
Requirement:
☐ The functionality of the automatic transfer switch must be checked (see Section 7.2, page 45).
Procedure:
• Commission the PV system (see PV inverter documentation).
• To start the system, press and hold the start-stop button on the
Sunny Island until an acoustic signal sounds.
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8 Appendix
8 Appendix
8.1 Single-Phase Battery-Backup System in Belgium
8.1.1
Schematic Diagram of the Automatic Transfer Switch
Figure 18: Schematic diagram of the single-phase automatic transfer switch with all-pole disconnection
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8 Appendix
8.1.2
SMA Solar Technology AG
Circuitry Overview
Figure 19: Connection of the automatic transfer switch with all-pole disconnection for Belgium (see Section 4.1.3 "Connecting the Sunny Island
Inverter", page 23)
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8 Appendix
8.2 Three-Phase Battery-Backup System in Belgium
8.2.1
Schematic Diagram of the Automatic Transfer Switch
Figure 20: Schematic diagram of the three-phase automatic transfer switch with all-pole disconnection
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8 Appendix
8.2.2
SMA Solar Technology AG
Circuitry Overview
Figure 21: Connection of the automatic transfer switch with all-pole disconnection for Belgium (see Section 4.2.3 "Connecting the Master",
page 27) and (see Section 4.2.4 "Connecting the Slaves", page 29)
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9 Contact
9 Contact
If you have technical problems with our products, please contact the SMA Service Line. We need the following
information in order to provide you with the necessary assistance:
• Sunny Island inverter type
• Sunny Island inverter serial number
• Sunny Island inverter firmware version
• Displayed error message
• Type of battery connected
• Nominal battery capacity
• Nominal battery voltage
• Type of the communication products connected
• Type and size of additional energy sources
Danmark
SMA Solar Technology AG
Belgien
SMA Benelux BVBA/SPRL
Deutschland
Niestetal
Belgique
Mechelen
Österreich
SMA Online Service Center:
www.SMA-Service.com
België
+32 15 286 730
Sunny Boy, Sunny Mini Central,
Sunny Tripower:
+49 561 9522-1499
Luxembourg
Schweiz
Monitoring Systems
(Kommunikationsprodukte):
+49 561 9522-2499
Fuel Save Controller
(PV-Diesel Hybridsysteme):
+49 561 9522-3199
Sunny Island, Sunny Backup,
Hydro Boy: +49 561 9522-399
Sunny Central: +49 561 9522-299
Luxemburg
Nederland
Česko
SMA Service Partner TERMS a.s.
Magyarország
+420 387 6 85 111
Slovensko
Polska
SMA Polska
+48 12 283 06 66
Ελλάδα
SMA Hellas AE
Κύπρος
Αθήνα
+30 210 9856666
España
SMA Ibérica Tecnología Solar, S.L.U. France
SMA France S.A.S.
Portugal
Barcelona
Lyon
+34 935 63 50 99
+33 472 22 97 00
United Kingdom
SMA Solar UK Ltd.
Bulgaria
SMA Italia S.r.l.
Italia
Milano
Milton Keynes
România
+39 02 8934-7299
+44 1908 304899
United Arab
Emirates
SMA Middle East LLC
대한민국
India
SMA Solar India Pvt. Ltd.
Abu Dhabi
Mumbai
+971 2234 6177
+91 22 61713888
SMA Technology Korea Co., Ltd.
SMA Solar (Thailand) Co., Ltd.
서울
+82-2-520-2666
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+66 2 670 6999
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9 Contact
South Africa
SMA Solar Technology AG
SMA Solar Technology
South Africa Pty Ltd.
Argentina
SMA South America SPA
Cape Town
Brasil
Santiago
Chile
+562 2820 2101
08600SUNNY (08600 78669)
International:
+27 (0)21 826 0600
Australia
SMA Australia Pty Ltd.
Perú
Other countries
International SMA Service Line
Sydney
Niestetal
Toll free for Australia:
1800 SMA AUS
(1800 762 287)
00800 SMA SERVICE
(+800 762 7378423)
International: +61 2 9491 4200
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www.SMA-Solar.com