Enphase M215 Manual - Power Up

Enphase M215 Manual - Power Up
Installation and Operations Manual
Enphase Microinverter
Model M215™
Contact Information
Enphase Energy Inc.
201 1St Street
Petaluma, CA 94952
Phone: 707-763-4784 Toll Free: 877-797-4743
Fax: 707-763-0784
http://www.enphase.com
info@enphaseenergy.com
FCC Compliance
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
Changes or modifications not expressly approved by the party responsible for
compliance may void the user’s authority to operate the equipment.
Other Information
Product information is subject to change without notice. All trademarks are
recognized as the property of their respective owners.
Copyright © 2011 Enphase Energy. All rights reserved.
Page 2
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Table of Contents
Important Safety Information .......................................................................... 4
Read this Before Installing or Using the M215 ...................................................... 4
Safety Instructions ........................................................................................... 4
The Enphase Microinverter System ................................................................... 5
How the Microinverter Works ............................................................................. 6
System Monitoring ........................................................................................ 6
Optimal Reliability ......................................................................................... 6
Ease of Design .............................................................................................. 6
Enphase Microinverter Installation .................................................................... 7
Compatibility and Capacity ................................................................................ 7
Parts and Tools Required ................................................................................... 8
Lightning Surge Suppression ............................................................................. 8
Installation Procedure ....................................................................................... 9
Step 1 – Measure AC at the Electrical Utility Connection ........................................ 9
Step 2 – Install the AC Branch Circuit Junction Box ............................................ 10
Step 3 – Position the Enphase Engage Cable...................................................... 11
Step 4 – Attach the Microinverters to the PV Racking .......................................... 12
Step 5 – Dress the Engage Cable ..................................................................... 13
Step 6 – Terminate the Unused End of the Engage Cable .................................... 15
Step 7 – Connect the Engage Cable to AC Junction Box(es) ................................. 16
Step 8 – Ground the System ........................................................................... 17
Step 9 – Complete the Paper Map .................................................................... 18
Complete the Enphase Map .......................................................................... 18
Alternative: Create Your Own Map ................................................................ 18
Step 10 – Connect the PV Modules ................................................................... 18
Step 11 – Build the Virtual Array ...................................................................... 19
Commissioning and Operation ....................................................................... 20
Commissioning .............................................................................................. 20
Operating Instructions .................................................................................... 20
Troubleshooting ........................................................................................... 21
Status LED Indications and Error Reporting ....................................................... 21
Startup LED Operation: ................................................................................ 21
GFDI Fault: ................................................................................................ 21
Other Faults: .............................................................................................. 21
Troubleshooting an Inoperable Microinverter ..................................................... 22
Disconnecting a Microinverter from the PV Module .............................................. 23
Installing a Replacement Microinverter .............................................................. 24
Technical Data ............................................................................................. 25
Technical Considerations ................................................................................. 25
Technical Specifications .................................................................................. 26
Enphase M215 Microinverter Parameters ........................................................ 26
Enphase Installation Map ................................................................................ 28
Sample Wiring Diagram – M215, 240 Vac .......................................................... 29
Sample Wiring Diagram – M215, 208 Vac .......................................................... 30
Page 3
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Important Safety Information
Read this Before Installing or Using the M215
This manual contains important instructions for use during installation and
maintenance of the Enphase M215™ Microinverter. User documentation is
updated frequently; Check the Enphase website
(http://www.enphase.com/support/downloads) for the latest information.
To reduce the risk of electrical shock, and to ensure the safe installation and
operation of the Enphase Microinverter, the following safety symbols appear
throughout this document to indicate dangerous conditions and important
safety instructions.
WARNING! This indicates a situation where failure to follow instructions may
be a safety hazard or cause equipment malfunction. Use extreme caution and
follow instructions carefully.
NOTE: This indicates information particularly important for optimal system
operation. Follow instructions closely.
Safety Instructions
Page 4

Perform all electrical installations in accordance with all applicable local electrical
codes and the National Electrical Code (NEC), ANSI/NFPA 70.

Be aware that only qualified personnel should install or replace Enphase
Microinverters.

Do not attempt to repair the Enphase Microinverter; it contains no userserviceable parts. If it fails, please contact Enphase customer service to obtain an
RMA (return merchandise authorization) number and start the replacement
process. Tampering with or opening the Enphase Microinverter will void the
warranty.

Before installing or using the Enphase Microinverter, please read all instructions
and cautionary markings in the technical description and on the Enphase
Microinverter System and the PV equipment.

Connect the Enphase Microinverter to the utility grid only after receiving prior
approval from the electrical utility company.

Be aware that the body of the Enphase Microinverter is the heat sink. Under
normal operating conditions, the temperature is 15°C above ambient, but under
extreme conditions the microinverter can reach a temperature of 80°C. To reduce
risk of burns, use caution when working with microinverters.

Do NOT disconnect the PV module from the Enphase Microinverter without first
removing AC power.
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
The Enphase Microinverter System
The Enphase Microinverter System is the world’s most technologically advanced
inverter system for use in utility-interactive applications. This manual details the safe
installation and operation of the Enphase Microinverter.
The three key elements of an Enphase Microinverter System include the:
Enphase M215 Microinverter
Enphase Envoy™ Communications Gateway
Enphase Enlighten™ web-based monitoring and analysis software
This integrated system maximizes energy harvest, increases system reliability, and
simplifies design, installation and management.
Page 5
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
How the Microinverter Works
The Enphase Microinverter maximizes energy production from your photovoltaic (PV)
array. Each Enphase Microinverter is individually connected to one PV module in your
array. This unique configuration means that an individual Maximum Peak Power Point
Tracker (MPPT) controls each PV module. This ensures that the maximum power
available from each PV module is exported to the utility grid regardless of the
performance of the other PV modules in the array. That is, although individual PV
modules in the array may be affected by shading, soiling, orientation, or PV module
mismatch, the Enphase Microinverter ensures top performance for its associated PV
module. The result is maximum energy production from your PV system.
System Monitoring
Indoors, you can install the Envoy Communications Gateway by plugging it into any
convenient 120Vac wall socket and providing an Ethernet connection to your
broadband router or modem. After installation of the Envoy, the Enphase
Microinverters automatically begin reporting to the Enphase Enlighten web server.
The Enlighten software presents current and historical system performance trends,
and it informs you when the PV system is not performing as expected.
Optimal Reliability
Microinverter systems are inherently more reliable than traditional inverters. The
distributed nature of a microinverter system ensures that there is no single point of
system failure in the PV system. Enphase Microinverters are designed to operate at
full power at ambient temperatures as high as 65 C (150 F). The microinverter
housing is designed for outdoor installation and complies with the NEMA 6
environmental enclosure rating standard:
NEMA 6 rating definition: Indoor or outdoor use primarily to provide a
degree of protection against hose-directed water, and the entry of
water during occasional temporary submersion at a limited depth, and
damage from external ice formation.
Ease of Design
PV systems using Enphase Microinverters are very simple to design and install. You
will not need string calculations, and you can install individual PV modules in any
combination of PV module quantity, type, age and orientation. You won’t need to
install cumbersome traditional inverters. Each microinverter quickly mounts on the
PV racking, directly beneath each PV module. Low voltage DC wires connect from the
PV module directly to the co-located microinverter, eliminating the risk of personnel
exposure to lethal 600Vdc power.
Page 6
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Enphase Microinverter Installation
Follow the instructions in this section to install Enphase M215™ Microinverters.
WARNING: Be aware that only qualified personnel should connect the
Enphase Microinverter to the utility grid.
WARNING: Be aware that installation of this equipment includes risk of
electric shock. Normally grounded conductors may be ungrounded and
energized when a ground fault is indicated.
Compatibility and Capacity
The Enphase M215 Microinverters are electrically compatible with most 60-cell PV
modules. For more information, see Technical Data page 25 of this manual.
WARNING: The M215 should be paired only with a 60-cell PV module.
Refer to the Enphase website (http://www.enphase.com/support/downloads) for a
list of electrically-compatible PV modules and approved PV racking systems. To
ensure mechanical compatibility, be sure to order the correct connector type for
both microinverter and PV module from your distributor.
Electrical Compatibility
Model Number
Works with PV Module
Type
M215-60-2LL-S22
60 cell
MC-4 Type 2 Locking or
Amphenol H4 Locking
60 cell
Tyco Solarlock Locking
M215-60-2LL-S22-NA
M215-60-2LL-S23
PV Module Connector
Type
M215-60-2LL-S23-NA
Capacity
Maximum number of M215s per 20 amp AC Branch Circuit
Service type
Max M215s per AC branch circuit
Page 7
Split phase 240V
17
Three phase 208V
25
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Parts and Tools Required
In addition to the M215 Microinverters, PV modules, racking, and associated
hardware, you will need the following items.
Enphase equipment:
Engage Cable, as needed
Cable clips
Sealing caps, as needed (for any unused drops on the Engage Cable)
Terminators, as needed (one needed at the end of each AC branch circuit)
Enphase disconnect tool (a number 2 Phillips screwdriver can be substituted)
Other items:
AC junction boxes
Gland or strain relief fitting (one per AC junction box)
Continuous grounding conductor, grounding washers
Number 2 Phillips screwdriver
Torque wrench, sockets, wrenches for mounting hardware
Adjustable wrench or open-ended wrench (for terminators)
Handheld mirror (for viewing indicator lights on the undersides of the
microinverters)
Lightning Surge Suppression
Lightning does not actually need to strike the equipment or building where PV
system is installed to cause damage. Often, a strike nearby will induce voltage spikes
in the electrical grid that can damage equipment. Enphase Energy Microinverters
have integral surge protection, greater than most traditional inverters. However, if
the surge has sufficient energy, the protection built into the Microinverter can be
exceeded, and the equipment can be damaged.
Since the Enphase Limited Warranty does not cover “acts of God” such as lightning
strikes, and since lightning strikes can occur anywhere, it is best practice to install
surge protection as part of any solar installation. We recommend the following
protection device. It has been tested to ensure that it does not interfere with power line
communications. Install per vendor instructions.
Vendor: Citel, Part Number: DS72RS-120
Application: Residential 120/240V Split Phase where N-G bond exists.
See the vendor datasheet for DS70R, (which includes the DS72RS-120) at
http://www.citelprotection.com/english/citel_data_sheets/ac_protection/.
Page 8
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Installation Procedure
Installing the Enphase Microinverter System involves several key steps. Each step
listed below is detailed in the following pages.
Step 1 – Measure AC at the Electrical Utility Connection
Step 2 – Install the AC Branch Circuit Junction Box
Step 3 – Position the Enphase Engage Cable
Step 4 – Attach the Microinverters to the PV Racking
Step 5 – Dress the Enphase Engage Cable
Step 6 – Terminate the Unused End of the Engage Cable
Step 7 – Connect the Engage Cable to AC Junction Box(es)
Step 8 – Ground the System
Step 9 – Complete the Installation Map
Step 10 – Connect the PV Modules
Step 11 – Build the Virtual Array
WARNING: DO NOT connect Enphase Microinverters to the utility grid or
energize the AC circuit(s) until you have completed all of the installation
procedures as described in the following sections.
Step 1 – Measure AC at the Electrical Utility Connection
Measure AC line voltage at the electrical utility connection to confirm AC service at
the site. Acceptable ranges are shown in the following table.
Single-phase 240 Volt AC
L1 to L2
211 to 264 Vac
L1, L2 to neutral
106 to 132 Vac
Three-phase 208 Volt AC
L1 to L2 to L3
183 to 229 VAC
L1, L2, L3 to neutral
106 to 132 VAC
NOTE: Be sure the Engage Cable you are using matches the electrical utility
connection at the site. Use 208 Vac (208 Vac three-phase) Engage Cable at
sites with three-phase 208 Vac service, or use 240 Vac Engage Cable at sites
with 240 Vac single-phase service. Check the labeling on the drop connectors
to verify the voltage type.
Page 9
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Step 2 – Install the AC Branch Circuit Junction Box
DANGER: Risk of Electrical Shock. Be aware that installation of this
equipment includes risk of electric shock. Do not install the AC junction box
without first removing AC power from the Enphase System.
WARNING: Only use electrical system components approved for wet locations.
WARNING: Do NOT exceed the maximum number of microinverters in an AC
branch circuit as listed on page 27 of this manual. You must protect each
microinverter AC branch circuit with a 20A maximum breaker.
a. Size the AC wire gauge to account for voltage drop. Select the correct wire
size based on the distance from the beginning of the microinverter AC
branch circuit to the breaker in the load center.
All components of system wiring must be considered, including internal
voltage drop within the length of Engage Cable. Typically, three wire
sections and several wire terminations must be quantified. There is also
some resistance associated with each circuit breaker. As all of these
resistances are in series, they add together. Since the same current is
flowing through each resistance, the total voltage drop is total current
times the total resistance. For a single-phase system, the total resistance
is equal to two times the one-way resistance. For a three-phase system,
each of the three line currents and resistances must be calculated.
Standard guidelines for voltage drop on feeder and AC branch circuit
conductors might not be sufficient for microinverter AC branch circuits
that contain the maximum allowable microinverters. This is due to high
inherent voltage rise on the AC branch circuit.
For more information, refer to our Voltage Drop Calculations Application
Note at http://www.enphase.com/support/downloads.
b. Install an appropriate junction
box at a suitable location on
the PV racking system
(typically at the end of a row of
PV modules).
c. Provide an AC connection from
the AC junction box back to the
electrical utility connection
using equipment and practices
as required by the NEC and
local jurisdictions.
Page 10
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Step 3 – Position the Enphase Engage Cable
The Engage Cable is a continuous length of 12 AWG (2.5 mm2), outdoor rated cable
with integrated connectors for microinverters. These connectors are preinstalled
along the Engage Cable at intervals to accommodate PV module widths. The
microinverters plug directly into the connectors, and the Engage Cable is terminated
into the junction box that feeds electricity back to the system AC disconnect.
a. Lay the Engage Cable along the route it will travel, positioning the
connectors so that they align with the PV modules.
WARNING: Plan the AC branches so that they do not exceed the maximum
number of microinverters in an AC branch circuit as listed on page 27 of this
manual. You must protect each microinverter AC branch circuit with a 20A
maximum breaker.
NOTE: Many PV modules have a central stiffening brace. In these cases, do not
position the connector and microinverter at the exact center of the PV module,
but position the Engage Cable so that the connectors do not conflict with the
braces.
b. PV module widths vary by manufacturer. On the Engage Cable, connectors
are spaced at intervals to allow for the widest PV modules compatible with
Enphase Microinverters. If narrower PV modules are used, it may be
necessary to account for excess cable by looping the cable at suitable
intervals.
Page 11
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Step 4 – Attach the Microinverters to the PV Racking
a. Mark the approximate centers of each PV module on the PV racking.
b. Evaluate the location of the microinverter with respect to the PV module
DC junction box or any other obstructions.
c. Ensure that the microinverter does not interfere with the PV module frame
or stiffening braces.
d. Ensure that the connector from the microinverter can easily reach the
connector on the Engage Cable.
e. Allow a minimum of 1.9 cm (0.75 inches) between the roof and the
bottom of the microinverter. Also allow 1.3 cm (0.50 inches) between the
back of the PV module and the top of the microinverter.
WARNING: Do not mount the microinverter in a location that allows longterm exposure to direct sunlight (i.e., the microinverter should
be covered by the PV module).
f.
Ground the microinverters using either a continuous,
unbroken grounding conductor or approved grounding
washers. If using grounding washers (e.g., WEEB) to
ground the microinverter chassis to the PV module
racking, choose one that is approved for the racking
manufacturer. Install one grounding washer per
microinverter. Torque the microinverter fasteners to the
values below.
6 mm (1/4”) mounting hardware – 5 N m (45 in-lbs)
minimum
8 mm (5/16”) mounting hardware – 9 N m (80 in-lbs) minimum
NOTE: Using a power screwdriver to tighten the grounding clamp screw is not
recommended due to the risk of thread galling.
NOTE: Compatible grounding washer part
numbers are included in the Racking
Compatibility Application Note. Installation
guidelines are included in the WEEB Installation
Application Note. Refer to both at:
http://www.enphase.com/support/downloads.
g. With the silver side of the
microinverter facing up and the black
side facing down, mount one microinverter
at each location using suitable hardware.
The indicator light on the underside of the
microinverter will be facing the roof.
Page 12
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Step 5 – Dress the Engage Cable
a. Attach the Engage Cable to the PV racking
using the cable clips, or you may use tie
wraps. The cable clips are designed so that
the connector from the microinverter can
also be dressed into the clip underneath
the Engage Cable.
NOTE: There are two through-holes in the
connector on the cable. These are not for
mounting but are used to disconnect the
connector. Keep these release holes
clear and accessible.
b. Dress any excess in loops so that the
Engage Cable does not contact the roof.
Do not allow the Engage Cable to rest on
the roof. There are several ways to support
the cable. One method is to place tie wraps
or clips on either side of the connector.
Use one or two additional clips, tie wraps,
or other support scheme to secure the
cable between connectors.
c. Remove the temporary shipping cap from
the Engage Cable and connect the
microinverter. There are two latching
mechanisms within the connectors. Listen
for two clicks as the connectors engage.
Ensure that both latching mechanisms
have engaged.
Page 13
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Step 5 – Dress the Engage Cable (continued)
d. Repeat for all microinverters in the AC
branch circuit.
e. Cover any unused connector with a sealing
cap. Listen for two clicks as the connectors
engage. Ensure that both latching
mechanisms have engaged.
Do not use the shipping cap to cover unused
connectors. The shipping cap does not provide
an adequate environmental seal. Enphase
sealing caps are required for the system to be
UL compliant and to protect against moisture
ingress.
NOTE: Enphase sealing caps are IP67 rated. Within the term “IP67”, “IP”
indicates an Ingress Protection (IP) rating against dust and liquids. This
specific rating of IP67 indicates that this connector protects against all dust
particles and immersion in liquid.
WARNING: Make sure protective sealing caps have been installed on all
unused AC connectors. Unused AC connectors are live when the system is
energized by the utility system.
NOTE: If you need to remove a sealing cap, you
must use the Enphase disconnect tool or a #2
Phillips screwdriver. Sealing caps may not be
reused.
Page 14
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Step 6 – Terminate the Unused End of the Engage Cable
Terminate the far end of the Engage Cable.
a. Remove 60mm (2.5 inches) of the cable sheath from the conductors.
b. Slide the hex nut onto
the Engage Cable.
hex nut
wire organizer
cap
c. Insert the Engage Cable
all the way into the wire
organizer (up to the
stop).
d. Bend the individual
wires back into the
recesses in the wire
organizer so that they angle
back toward the cable.
e. Cut the individual wires so that no
excess extends outside of the wire
organizer. The portions that angle
back will need to extend enough to fit
neatly into the 0.5 cm (0.2 in)
recesses in the wire organizer and
flush with the edge of the cap.
f.
Screw the hex nut onto the cap.
Never unscrew the hex nut as this can twist and damage the cable.
g. Hold the cap with an Enphase disconnect tool, or insert a #2 Phillips
screwdriver.
h. Use a 24mm (7/8 inch) wrench to tighten the hex nut until the latching
mechanism is screwed all the way to the base.
Page 15
i.
Use a tie wrap or cable clip to attach the cable to the PV racking, so that
the Engage Cable and terminator do not touch the roof.
j.
Ensure that all cabling is located underneath the PV module.
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Step 7 – Connect the Engage Cable to AC Junction Box(es)
a. Connect Engage Cable into the AC branch circuit junction box using an
appropriate gland or strain relief fitting. The Engage Cable requires a
strain relief connector with an opening of 1.3 cm (0.5 inches) in diameter.
b. Connect the Engage Cable
into additional AC junction
boxes as needed to transition
to conduit between smaller
sub-arrays.
Refer to the wiring diagrams
located in the Appendix of
this manual for more
information.
NOTE: The Engage Cable uses a
different wiring scheme than used with other Enphase Microinverters. Be
aware of the difference in wire color code.
Wires are identified as follows: L1 is sheathed in Black, L2 is sheathed in red,
L3 is sheathed in blue, Neutral is sheathed in white, and Ground is sheathed
in green. The grounding wire is used to ground the microinverters. A WEEB or
continuous ground is required in addition to this green grounding wire.
Balanced 208 VAC is accomplished by alternating phases between
microinverters.
240 Volt AC Split Phase Wiring
208 Volt AC Three-Phase Wiring
Black – L1
Red – L2
White – Neutral
Green - Ground
Black – L1
Red – L2
Blue – L3
White – Neutral
Green - Ground
NOTE: The green wire acts as equipment ground. A continuous GEC for
system ground is also required as described in the next step.
Page 16
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Step 8 – Ground the System
If you are not using WEEB grounding washers to ground the microinverter chassis as
described in step 4, follow the steps below. Each Enphase Microinverter comes with a
cable clip that can accommodate a 6-8 AWG conductor.
NOTE: The AC output neutral is not bonded to ground inside the
microinverter.
a. Route a continuous GEC through each of the microinverters to the NECapproved AC grounding electrode.
b. You can ground the PV racking and PV module to this conductor
using a crimp connection. An alternative method is to connect
the microinverter to the grounded racking using a
grounding washer approved for the racking.
c. Torque the microinverter fasteners to the values below.
6 mm (1/4”) mounting hardware – 5 N m (45 in-lbs) minimum
8 mm (5/16”) mounting hardware – 9 N m (80 in-lbs) minimum
NOTE: Using a power screwdriver to tighten the grounding clamp screw is not
recommended due to the risk of thread galling.
Page 17
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Step 9 – Complete the Paper Map
The Enphase Installation Map is a diagrammatic representation of the physical
location of each microinverter in your PV installation. The virtual array in Enlighten is
created from the map you create. Use the blank map in the Appendix to record
microinverter placement for the system, or provide your own layout if a larger or
more intricate installation map is required.
Complete the Enphase Map
a. Each Enphase Microinverter has a removable serial number label located
on the mounting plate. Peel the removable serial number label from each
Enphase Microinverter and affix it to the respective location on the
Enphase installation map (see map on page 28). Remember to keep a
copy of the installation map for your records.
Alternative: Create Your Own Map
a. Draw a top-down view of the array using the Array Map template (using
either the grid on Side A or the freeform area on Side B). Make sure to
leave enough room to place the serial number stickers.
b. When installing the microinverters, remove the serial number labels
located next to the DC input cables and place them in the correct order on
your drawing of the system. Remember to keep a copy of the installation
map for your records.
Step 10 – Connect the PV Modules
NOTE: Completely install all microinverters
and all system AC connections prior to
installing the PV modules.
a. Mount the PV modules above the
microinverters.
b. Mate the microinverters and PV modules
as required. Repeat for all remaining PV
modules using one microinverter for each
PV module.
Page 18
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Step 11 – Build the Virtual Array
When the system is energized and the Envoy detects all the installed microinverters,
you can create the virtual array in Enlighten from the Enphase map you created.
Once the virtual array is built, Enlighten displays a graphic representation of the PV
system. It also shows detailed current and historical performance information. Please
go to http://www.enphase.com for more information on the Enphase Enlighten webbased monitoring and analysis.
a. Scan the paper installation map and upload it to the Activation form
online.
b. Use Array Builder to create the virtual array in Enlighten. Use the paper
map created in step 9 as your reference.
NOTE: Go to http://www.enphase.com/support/learningcenter to view an
Array Builder demo.
c. If you do not already have an account, go to http://www.enphase.com
and click “Enlighten Login” to register.
Page 19
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Commissioning and Operation
WARNING: Be aware that only qualified personnel must connect the Enphase
Microinverter to the utility grid.
WARNING: Ensure that all AC and DC wiring is correct. Ensure that none of
the AC and DC wires are pinched or damaged. Ensure that all AC junction
boxes are properly closed.
WARNING: Connect the Enphase Microinverter to the utility grid only after
receiving prior approval from the electrical utility company.
NOTE: The Status LED on the underside of each microinverter will blink green
six times to indicate normal start-up operation approximately one minute
after DC power is applied.
Commissioning
To commission the Enphase Microinverter PV system:
1. Turn ON the AC disconnect or circuit breaker for each microinverter AC
branch circuit.
2. Turn ON the main utility-grid AC circuit breaker. Your system will start
producing power after a five-minute wait time.
3. The Enphase Microinverters will begin communicating over the power lines
to the Envoy. The time required for all microinverters to report to the
Envoy will vary with the number of microinverters in the system. The first
units should be detected within 15 minutes but the entire system could
take hours to detect.
For more information on Envoy operation, refer to the Envoy Installation and
Operation Manual at http://www.enphase.com/support/downloads.
Operating Instructions
The Enphase Microinverter is powered on when sufficient DC voltage from the PV
module is applied. The Status LED of each microinverter will blink green six times to
indicate normal start-up operation approximately one minute after DC power is
applied. You may need to use a handheld mirror to view indicator lights on the
undersides of the microinverters.
Page 20
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Troubleshooting
Adhere to all the safety measures described throughout this manual. Qualified
personnel can use the following troubleshooting steps if the PV system does not
operate correctly.
WARNING: Do not attempt to repair the Enphase Microinverter; it contains
no user-serviceable parts. If it fails, please contact Enphase customer service
to obtain an RMA (return merchandise authorization) number and start the
replacement process.
Status LED Indications and Error Reporting
Startup LED Operation:
The Status LED of each microinverter will blink green six times to indicate normal
start-up operation approximately one minute after DC power is applied.
Six short red blinks after DC power is first applied to the microinverter indicate a
failure during microinverter startup.
Post-Startup LED Indications: Use a handheld mirror to view indicator lights on
the undersides of the microinverters:
Flashing Green – Producing power and communicating with Envoy
Flashing Orange – Producing power and not communicating with Envoy
Flashing Red – Not producing power
GFDI Fault:
A solid red status LED when DC power has been cycled indicates the microinverter
has detected a ground fault (GFDI) error. The LED will remain red and the fault will
continue to be reported by the Envoy until the error has been cleared.
The condition should clear with operator intervention unless conditions causing the
event have not been remedied or if the failure is permanent.
Follow the instructions in the Envoy Communications Gateway Installation and
Operation Manual to clear this condition. Or, for assistance, contact Enphase Energy
customer support at 877-797-4743 or at support@enphase.com.
Other Faults:
All other faults are reported to the Envoy. Refer to the Envoy Installation and
Operation Manual for troubleshooting procedures.
WARNING: Be aware that only qualified personnel should troubleshoot the
PV array or the Enphase Microinverter.
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Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
WARNING: Never disconnect the DC wire connectors under load. Ensure that
no current is flowing in the DC wires prior to disconnecting. An opaque
covering may be used to cover the PV module prior to disconnecting the PV
module.
WARNING: Always disconnect AC power before disconnecting the PV module
wires from the Enphase Microinverter. The AC connector of the microinverter
is suitable as a disconnecting means.
WARNING: The Enphase Microinverters are powered by DC power from the
PV modules. Make sure you disconnect the DC connections and reconnect DC
power to watch for the six short LED blinks one minute after DC is applied.
Troubleshooting an Inoperable Microinverter
To troubleshoot an inoperable microinverter, follow the steps in the order shown:
1. Check the connection to the utility grid and verify the utility voltage and
frequency are within allowable ranges shown in the Technical Data section
on page 25 of this manual.
2. Verify that AC line voltage at the electrical utility connection and at the AC
junction box for each AC branch circuit are within the ranges are shown in
the following table:
240 Volt AC Split Phase
208 Volt AC 3 Phase
L1 to L2
211 to 264 Vac
L1 to L2 to L3
183 to 229 Vac
L1, L2 to neutral
106 to 132 Vac
L1, L2, L3 to neutral
106 to 132 Vac
3. Verify utility power is present at the microinverter in question by removing
AC, then DC power. Never disconnect the DC wires while the
microinverter is producing power.
4. Re-connect the DC PV module connectors. The Status LED of each
microinverter will blink green six times to indicate normal start-up
operation one minute after DC power is applied.
5. Check the AC branch circuit between all the microinverters. As described
in the previous step, verify that all microinverters are energized by the
utility grid.
6. Make sure that any upstream AC disconnects, as well as the dedicated
circuit breakers for each AC branch circuit, are functioning properly and
are closed.
7. Verify the PV module DC voltage is within the allowable range shown in
the Technical Data section on page 25 of this manual.
8. Check the DC connections between the microinverter and the PV module.
9. If the problem persists, please call Customer Support at Enphase Energy.
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Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Disconnecting a Microinverter from the PV Module
To ensure the microinverter is not disconnected from the PV modules under load,
adhere to the following disconnection steps in the order shown:
1. Disconnect the microinverter from the Engage Cable.
The Enphase AC connectors are toolremovable only. The installation kit
includes a disconnect tool with two
prongs. To disconnect a microinverter
from the Engage Cable, insert these two
prongs into the two holes in the AC cable
connector. Rock the connector back and
forth while pulling gently to disengage.
If the disconnect tool is not available, a #2 Phillips screwdriver can be
used in its place. Insert the screwdriver into one hole, rock that side of the
drop connector out, then insert the screwdriver into the other hole and
pull the connector out entirely.
2. Cover the PV module with an opaque cover.
3. Using a clamp on meter, verify there is no current flowing in the DC wires
between the PV module and the microinverter.
4. Take care when measuring DC current as most clamp-on meters must be
zeroed first and tend to drift with time.
5. Disconnect the PV module DC wire connectors from the microinverter
using the Enphase disconnect tool.
6. Remove the microinverter from the PV racking.
WARNING: Do not leave the AC connector on the Engage Cable uncovered
for an extended period. If you do not plan to replace the microinverter
immediately, you must cover any unused connector with a sealing cap.
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Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Installing a Replacement Microinverter
1. With the silver side of the microinverter facing up and the black side
facing down, attach the replacement microinverter to the PV racking using
hardware recommended by your PV racking vendor.
2. If you are using grounding washers (e.g., WEEB) to ground the chassis of
the microinverter, the old grounding washer should be discarded, and a
new grounding washer must be used when installing the replacement
microinverter. Torque the microinverter fasteners to the values below.
6 mm (1/4”) mounting hardware – 5 N m (45 in-lbs) minimum
8 mm (5/16”) mounting hardware – 9 N m (80 in-lbs) minimum
NOTE: Using a power screwdriver to tighten the grounding clamp screw is not
recommended due to the risk of thread galling.
3. If you are using a grounding electrode conductor to ground the
microinverter chassis, attach the grounding electrode conductor to the
microinverter ground clamp.
4. Remove the temporary shipping cap from the Engage Cable and connect
the microinverter. There are two latching mechanisms within the
connectors. Listen for two clicks as the connectors engage. Ensure that
both latching mechanisms have engaged.
5. Mount the PV module above the microinverter.
6. First connect the positive DC wire from the PV module to the negatively
marked DC connector (male pin) of the microinverter. Then connect the
negative DC wire from the PV module to the positively marked DC
connector (female socket) of the microinverter.
7. Energize the AC branch circuit breaker, and verify operation of the
replacement microinverter by checking the indicator light on the underside
of the microinverter. You may need a handheld mirror to see the indicator
light.
8. Initiate a device scan at the Envoy. To do this, press and hold the Menu
button on Envoy for two seconds to bring up the Envoy menu on the LCD
window. When the LCD window displays “Enable Communication Check”,
release the Menu button.
9. Use Enlighten’s Array Builder function to add the newly detected
microinverter to the virtual array.
Page 24
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Technical Data
Technical Considerations
The Enphase M215 Microinverters are designed to operate with most 60-cell PV
modules. Be sure to verify the voltage and current specifications of your PV module
match those of the microinverter. For more information, refer to the Enphase
website (http://www.enphase.com/support/downloads) for a list of compatible PV
racking and PV modules.
WARNING: You must match the DC operating voltage range of the PV
module with the allowable input voltage range of the Enphase Microinverter.
WARNING: The maximum open circuit voltage of the PV module must not
exceed the specified maximum input voltage of the Enphase Microinverter.
The output voltage and current of the PV module depends on the quantity, size and
temperature of the PV cells, as well as the insolation on each cell. The highest PV
module output voltage occurs when the temperature of the cells is the lowest and
the PV module is at open circuit (not operating). The maximum short circuit current
rating of the PV module must be equal to or less than the maximum input DC short
circuit current rating of the microinverter.
A list of compatible PV modules is maintained on the Enphase website
(http://www.enphase.com/support/downloads).
Page 25
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Technical Specifications
Enphase M215 Microinverter Parameters
Topic
Unit
Min
Typical
Max
MPPT voltage range
V
22
29
36
Operating range
V
16
Maximum DC input voltage
V
Minimum / Maximum start voltage
V
Maximum DC input short circuit current
A
15
Maximum DC input current
A
10.5
mA
1000
A
0
DC Parameters
Ground fault protection
Maximum input source backfeed current to input
source
36
45
26.4
45
AC Parameters
Maximum AC output Power (-40 to 65 C)
W
Output power factor
215
0.95
0.99
1
Nominal AC output voltage range
240 Vac (split phase)
Vrms
211
240
264
208 Vac (three phase)
Vrms
183
208
229
240 Vac (split phase)
Vrms
206
240
269
208 Vac (three phase)
Vrms
179
208
232
Extended AC output voltage range
Maximum AC output current
240 Vac (nominal)
A
0.9
208 Vac (nominal)
A
1.01
Nominal AC output frequency range
Hz
59.3
60
60.5
Extended AC output frequency range
Hz
59.2
60
60.6
Maximum AC output over current protection
Maximum AC output fault current & duration
1
A
Ap/ms
20 A
25.2Apeak over 1.74ms
1.05Arms over 3 cycles
1.04Arms over 5 cycles
High AC Voltage trip limit accuracy
%
2.5
Low AC Voltage Trip limit accuracy
%
4.0
Frequency trip limit accuracy
Hz
±0.1
Trip time accuracy
ms
±33
Arms at nominal voltage
Page 26
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Enphase M215 Microinverter Parameters
Topic
Unit
Miscellaneous Parameters
Min
Typical
Max
Maximum inverters per 20 amp AC branch circuit
240 Vac (split phase)
1
17
208 Vac (three phase)
1
25
Peak inverter efficiency
%
96.3
CEC weighted efficiency
%
96.0
Static MPPT efficiency (weighted, ref EN 50530)
%
99.8
Total Harmonic Distortion
%
3.0
5
Operating temperature range (internal)
C
-40
85
Ambient temperature range
C
-40
65
Night Tare Loss
mW
C
Storage temperature range
46
-40
65
Features
Dimensions not including mounting bracket
(approximate)
Weight
17.3 cm x 16.4 cm x 2.5 cm
(6.8” x 6.45” x 1.0”)
3.5 Lbs (1.6 Kg)
Enclosure environmental rating
NEMA 6
Cooling
Natural convection – no fans
Communication
Power line
Standard warranty term
25-year limited warranty
Compliance
UL1741, IEEE1547, FCC Part 15 Class B
CAN/CSA-C22.2 NO. 0-M91, 0.4-04, and 107.1-01
Integrated AC disconnect
Page 27
The AC connector has been evaluated and
approved for use as the load-break
disconnect required by the NEC.
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Enphase Installation Map
Page 28
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Sample Wiring Diagram – M215, 240 Vac
Page 29
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Sample Wiring Diagram – M215, 208 Vac
Page 30
Copyright Enphase Energy Inc. 2011
141-00012, Rev 02c
Enphase Energy Inc.
201 1St Street
Petaluma, CA 94952
Phone: 707-763-4784
TOLL FREE: 877-797-4743
Fax: 707-763-0784
www.enphase.com
info@enphaseenergy.com
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