InvertFlex User Manual ver 2.0
User Manual
InvertFlex 1K/2K/3K/5K
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Table of Contents
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ABOUT THIS MANUAL
Purpose
This manual describes the assembly, installation, operation and troubleshooting of this unit. Please read this manual carefully before installations and operations. Keep this manual for future reference.
Scope
This manual provides safety and installation guidelines as well as information on tools and wiring.
SAFETY INSTRUCTIONS
WARNING: This chapter contains important safety and operating instructions. Read and keep this manual for future reference.
1. Before using the unit, read all instructions and cautionary markings on the unit, the batteries and all appropriate sections of this manual.
2. CAUTION - To reduce risk of injury, charge only deep-cycle lead acid type rechargeable batteries.
Other types of batteries may burst, causing personal injury and damage.
3. Do not disassemble the unit. Take it to a qualified service center when service or repair is required.
Incorrect re-assembly may result in a risk of electric shock or fire.
4. To reduce risk of electric shock, disconnect all wirings before attempting any maintenance or cleaning.
Turning off the unit will not reduce this risk.
5. CAUTION – Only qualified personnel can install this device with battery.
6. NEVER charge a frozen battery.
7. For optimum operation of this inverter/charger, please follow required spec to select appropriate cable size. It’s very important to correctly operate this inverter/charger.
8. Be very cautious when working with metal tools on or around batteries. A potential risk exists to drop a tool to spark or short circuit batteries or other electrical parts and could cause an explosion.
9. Please strictly follow installation procedure when you want to disconnect AC or DC terminals. Please refer to INSTALLATION section of this manual for the details.
10. Fuses (4 pieces of 40A, 32VDC for 1KVA/2KVA, 6 pieces of 40A, 32VDC for 3KVA, 1 piece of 200A,
64VDC for 5KVA) are provided as over-current protection for the battery supply.
11. GROUNDING INSTRUCTIONS -This inverter/charger should be connected to a permanent grounded wiring system. Be sure to comply with local requirements and regulation to install this inverter.
12. NEVER cause AC output and DC input short circuited. Do NOT connect to the mains when DC input short circuits.
13. Warning!! Only qualified service persons are able to service this device. If errors still persist after following troubleshooting table, please send this inverter/charger back to local dealer or service center for maintenance.
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INTRODUCTION
This is a multi-function inverter/charger, combining functions of inverter, solar charger and battery charger to offer uninterruptible power support with portable size. Its comprehensive LCD display offers user-configurable and easy-accessible button operation such as battery charging current, AC/solar charger priority, and acceptable input voltage based on different applications.
Features
Pure sine wave inverter
Configurable input voltage range for home appliances and personal computers via LCD setting
Configurable battery charging current based on applications via LCD setting
Configurable AC/Solar Charger priority via LCD setting
Compatible to mains voltage or generator power
Auto restart while AC is recovering
Overload/ Over temperature/ short circuit protection
Smart battery charger design for optimized battery performance
Cold start function
Basic System Architecture
The following illustration shows basic application for this inverter/charger. It also includes following devices to have a complete running system:
Generator or Utility.
PV modules (option)
Consult with your system integrator for other possible system architectures depending on your requirements.
This inverter can power all kind of appliances at home or office environment, including motor-type appliances such as tube light, fan, refrigerator and air conditioner.
Figure 1 Hybrid Power System
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Product Overview
InvertFlex 5K single mode
InvertFlex 1K
InvertFlex 2K/3K
NOTE: For parallel model installation and operation, please check separate parallel installation guide for the details.
InvertFlex 5K parallel model
1. LCD display
2. Status indicator
3. Charging indicator
4. Fault indicator
5. Function buttons
6. Power on/off switch
7. AC input
8. AC output
9. PV input
10. Battery input
11. Circuit breaker
12. RS232 communication port
13. Parallel communication cable (only for InvertFlex 5K)
14. Current sharing cable (only for InvertFlex 5K)
15. Dry contact
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INSTALLATION
Unpacking and Inspection
Before installation, please inspect the unit. Be sure that nothing inside the package is damaged. You should have received the following items inside of package:
The unit x 1
User manual x 1
Communication cable x 1
Software CD x 1
Preparation
Before connecting all wirings, please take off bottom cover by removing two screws as shown below.
Mounting the Unit
Consider the following points before selecting where to install:
Do not mount the inverter on flammable construction materials.
Mount on a solid surface
Install this inverter at eye level in order to allow the LCD display to be read at all times.
For proper air circulation to dissipate heat, allow a clearance of approx. 20 cm to the side and approx. 50 cm above and below the unit.
The ambient temperature should be between 0°C and 55°C to ensure optimal operation.
The recommended installation position is to be adhered to the wall vertically.
Be sure to keep other objects and surfaces as shown in the diagram to guarantee sufficient heat dissipation and to have enough space for removing wires.
SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.
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Install the unit by screwing three screws.
Battery Connection
CAUTION: For safety operation and regulation compliance, it’s requested to install a separate DC over-current protector or disconnect device between battery and inverter. It may not be requested to have a disconnect device in some applications, however, it’s still requested to have over-current protection installed. Please refer to typical amperage in below table as required fuse or breaker size.
Ring terminal:
WARNING! All wiring must be performed by a qualified personnel.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for battery connection. To reduce risk of injury, please use the proper recommended cable and terminal size as below.
Recommended battery cable and terminal size:
Model
Typical
Amperage
Battery capacity
Wire Size Cable mm
2
Ring Terminal
Dimensions
D (mm) L (mm)
14 6.4 29.2
Torque value
InvertFlex
1K/2K
66A 100AH
1*6AWG
8
22
6.4
6.4
23.8
33.2
2~ 3 Nm
InvertFlex
3K
100A
100AH
200AH
2*10AWG
1*4AWG
2~ 3 Nm
2*8AWG 14 6.4 29.2
InvertFlex
5K
84A 200AH
1*4AWG
2*8AWG
22
14
6.4
6.4
33.2
29.2 2~ 3 Nm
2*8AWG 14 6.4 29.2
Please follow below steps to implement battery connection:
1. Assemble battery ring terminal based on recommended battery cable and terminal size.
2. InvertFlex 1K model supports 12VDC system, InvertFlex 2K/3Kmodel supports 24VDC system and
InvertFlex 5K model supports 48VDC system. Connect all battery packs as below chart. It’s suggested to connect at least 100Ah capacity battery for 1-3KVA model and at least 200Ah capacity battery for
InvertFlex 5K model.
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NOTE: Please only use sealed lead acid battery or sealed GEL/AGM lead-acid battery.
3. Insert the ring terminal of battery cable flatly into battery connector of inverter and make sure the bolts are tightened with torque of 2-3 Nm. Make sure polarity at both the battery and the inverter/charge is correctly connected and ring terminals are tightly screwed to the battery terminals.
WARNING: Shock Hazard
Installation must be performed with care due to high battery voltage in series.
CAUTION!!
Do not place anything between the flat part of the inverter terminal and the ring terminal. Otherwise, overheating may occur.
CAUTION!!
Do not apply anti-oxidant substance on the terminals before terminals are connected tightly.
CAUTION!!
Before making the final DC connection or closing DC breaker/disconnector, be sure positive (+) must be connected to positive (+) and negative (-) must be connected to negative
(-).
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AC Input/Output Connection
CAUTION!! Before connecting to AC input power source, please install a separate AC breaker between inverter and AC input power source. This will ensure the inverter can be securely disconnected during maintenance and fully protected from over current of AC input. The recommended spec of AC breaker is 10A for InvertFlex 1K, 20A for InvertFlex 2K, 32A for InvertFlex 3K , 50A for InvertFlex 5K.
CAUTION!! There are two terminal blocks with “IN” and “OUT” markings. Please do NOT mis-connect input and output connectors.
WARNING! All wiring must be performed by a qualified personnel.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for AC input connection. To reduce risk of injury, please use the proper recommended cable size as below.
Suggested cable requirement for AC wires
Model Gauge Torque Value
InvertFlex 1K 16 AWG 0.5~ 0.6 Nm
InvertFlex 2K
InvertFlex 3K
14 AWG
12 AWG
0.8~ 1.0 Nm
1.2~ 1.6 Nm
InvertFlex 5K 8 AWG 1.4~1.6Nm
Please follow below steps to implement AC input/output connection:
1. Before making AC input/output connection, be sure to open DC protector or disconnector first.
2. Remove insulation sleeve 10mm for six conductors. And shorten phase L and neutral conductor N 3 mm.
3. Insert AC input wires according to polarities indicated on terminal block and tighten the terminal screws. Be sure to connect PE protective conductor ( ) first.
→Ground (yellow-green)
L→LINE (brown or black)
N→Neutral (blue)
InvertFlex 1K
InvertFlex 2K/3K/5K
WARNING:
Be sure that AC power source is disconnected before attempting to hardwire it to the unit.
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4. Then, insert AC output wires according to polarities indicated on terminal block and tighten terminal screws.
Be sure to connect PE protective conductor ( ) first.
→Ground (yellow-green)
L→LINE (brown or black)
N→Neutral (blue)
InvertFlex 1K
InvertFlex 2K/3K/5K
5. Make sure the wires are securely connected.
CAUTION: Important
Be sure to connect AC wires with correct polarity. If L and N wires are connected reversely, it may cause utility short-circuited when these inverters are worked in parallel operation.
CAUTION: Appliances such as air conditioner are required at least 2~3 minutes to restart because it’s required to have enough time to balance refrigerant gas inside of circuits. If a power shortage occurs and recovers in a short time, it will cause damage to your connected appliances. To prevent this kind of damage, please check manufacturer of air conditioner if it’s equipped with time-delay function before installation. Otherwise, this inverter/charger will trig overload fault and cut off output to protect your appliance but sometimes it still causes internal damage to the air conditioner.
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PV Connection
CAUTION: Before connecting to PV modules, please install separately a DC circuit breaker between inverter and PV modules.
WARNING! All wiring must be performed by a qualified personnel.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for PV module connection. To reduce risk of injury, please use the proper recommended cable size as below.
Typical Amperage Gauge Torque Value
50A 8 AWG 1.4~1.6 Nm
PV Module Selection:
When selecting proper PV modules, please be sure to consider below requirements first:
1. Open circuit Voltage (Voc) of PV modules not exceeds max. PV array open circuit voltage of inverter.
InvertFlex InvertFlex InvertFlex InvertFlex
INVERTER MODEL
1K 2K 3K 5K
Solar Charger
Charging Current (PWM)
System DC Voltage
12Vdc 24Vdc
50Amp
48Vdc
Operating Voltage Range
15~18Vdc 30~32Vdc 60~72vdc
Max. PV Array Open Circuit Voltage
40Vdc 60Vdc 105Vdc
2. Max. Power Voltage (Vmpp) of PV modules should be close to best Vmp of inverter or within Vmp range to get best performance. If one PV module can not meet this requirement, it’s necessary to have several PV modules in series connection. Refer to below table.
Model Best Vmp Vmp range
InvertFlex 1K 15Vdc 15V~18V
InvertFlex 2K/3K
InvertFlex 5K
30Vdc
60Vdc
30V~32V
56V~72V
Note: * Vmp: panel max power point voltage.
The PV charging efficiency is maximized while PV system voltage is close to Best Vmp.
Maximum PV module numbers in Series: Vmpp of PV module * X pcs ≒ Best Vmp of Inverter or Vmp range
PV module numbers in Parallel: Max. charging current of inverter / Impp
Total PV module numbers = maximum PV module numbers in series * PV module numbers in parallel
Take 1KVA inverter as an example to select proper PV modules. After considering Voc of PV module not exceeds
40Vdc and max. Vmpp of PV module close to 15Vdc or within 13Vdc ~ 18Vdc, we can choose PV module with below specification.
Maximum Power (Pmax) 85W
Max. Power Voltage Vmpp(V) 17.6V
Max. PV module numbers in series
1 17.6 x 1 ≒ 15 ~ 18
Max. Power Current Impp(A) 4.83A
Open Circuit Voltage Voc(V)
Short Circuit Current Isc(A)
21.6V
5.03A
PV module numbers in parallel
10 50 A / 4.83
Total PV module numbers
1 x 10 = 10
Maximum PV module numbers in Series: 1
PV module numbers in Parallel: 10
Total PV module numbers: 1 x 10 = 10
Take InvertFlex 2K/InvertFlex 3K inverter as an example to select proper PV module. After considering Voc of PV module not exceed 60Vdc and max. Vmpp of PV module close to 30Vdc or within 30Vdc ~ 32Vdc, we can choose PV module with below specification.
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Maximum Power (Pmax) 260W
Max. Power Voltage Vmpp(V) 30.9V
Max. Power Current Impp(A) 8.42A
Max. PV module numbers in series
1 30.9 x 1 ≒ 30 ~ 32
PV module numbers in parallel
6 50 A / 8.42
Open Circuit Voltage Voc(V) 37.7V
Short Circuit Current Isc(A)
Maximum Power (Pmax)
8.89A
260W
Max. Power Voltage Vmpp(V) 30.9V
Total PV module numbers
1 x 6 = 6
Maximum PV module numbers in Series: 1
PV module numbers in Parallel: 6
Total PV module numbers: 1 x 6 = 6
Take InvertFlex 5K model inverter as an example to select proper PV module. After considering Voc of PV module not exceed 105Vdc and max. Vmpp of PV module close to 60Vdc or within 56Vdc ~ 72Vdc, we can choose PV module with below specification.
Max. PV module numbers in series
2 30.9 x 2 ≒ 56 ~ 72
Max. Power Current Impp(A) 8.42A
Open Circuit Voltage Voc(V)
Short Circuit Current Isc(A)
37.7V
8.89A
PV module numbers in parallel
6 50 A / 8.42
Total PV module numbers
2 x 6 = 12
Maximum PV module numbers in Series: 2
PV module numbers in Parallel: 6
Total PV module numbers: 2 x 6 = 12
Please follow below steps to implement PV module connection:
1. Remove insulation sleeve 10 mm for positive and negative conductors.
2. Check correct polarity of connection cable from PV modules and PV input connectors. Then, connect positive pole (+) of connection cable to positive pole (+) of PV input connector. Connect negative pole (-) of connection cable to negative pole (-) of PV input connector.
3. Make sure the wires are securely connected.
Final Assembly
After connecting all wirings, please put bottom cover back by screwing two screws as shown below.
InvertFlex 1K/2K/3K InvertFlex 5K
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Communication Connection
Please use supplied communication cable to connect to inverter and PC. Insert bundled CD into a computer and follow on-screen instruction to install the monitoring software. For the detailed software operation, please check user manual of software inside of CD.
Dry Contact Signal
There is one dry contact (3A/250VAC) available on the rear panel. It could be used to deliver signal to external device when battery voltage reaches warning level.
Unit Status
Power Off
Power On
Condition
Unit is off and no output is powered.
Output is powered from Utility.
Output is powered from Battery or Solar.
Program 01 set as Utility
Battery voltage < Low DC warning voltage
Battery voltage > Setting value in Program 13 or battery charging reaches floating stage
Program 01 is set as SBU or
Solar first
Battery voltage < Setting value in Program 12
Battery voltage > Setting value in Program 13 or battery charging reaches floating stage
Dry contact port:
NC & C
Close
Close
NO & C
Open
Open
Open
Close
Open
Close
Close
Open
Close
Open
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OPERATION
Power ON/OFF
Once the unit has been properly installed and the batteries are connected well, simply press On/Off switch
(located on the button of the case) to turn on the unit.
Operation and Display Panel
The operation and display panel, shown in below chart, is on the front panel of the inverter. It includes three indicators, four function keys and a LCD display, indicating the operating status and input/output power information.
LCD display
LED indicators
Function keys
LED Indicator
LED Indicator
Green
Green
Red
Messages
Solid On Output is powered by utility in Line mode.
Flashing Output is powered by battery or PV in battery mode.
Solid On Battery is fully charged.
Flashing Battery is charging.
Solid On Fault occurs in the inverter.
Flashing Warning condition occurs in the inverter.
Function Keys
Function Key Description
ESC
UP
DOWN
ENTER
To exit setting mode
To go to previous selection
To go to next selection
To confirm the selection in setting mode or enter setting mode
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LCD Display Icons
Icon
Input Source Information
Indicates the AC input.
Indicates the PV input
Function description
Indicate input voltage, input frequency, PV voltage, battery voltage and charger current.
Configuration Program and Fault Information
Indicates the setting programs.
Indicates the warning and fault codes.
Warning: flashing with warning code.
Fault:
Output Information
lighting with fault code
Indicate output voltage, output frequency, load percent, load in VA, load in
Watt and discharging current.
Battery Information
Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% in battery mode and charging status in line mode.
In AC mode, it will present battery charging status.
Status Battery voltage
<2V/cell
Constant
Current mode /
Constant
Voltage mode
2 ~ 2.083V/cell
2.083 ~ 2.167V/cell
> 2.167 V/cell
LCD Display
4 bars will flash in turns.
Bottom bar will be on and the other three bars will flash in turns.
Bottom two bars will be on and the other two bars will flash in turns.
Bottom three bars will be on and the top bar will flash.
Floating mode. Batteries are fully charged. 4 bars will be on.
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In battery mode, it will present battery capacity.
Load Percentage Battery Voltage
< 1.717V/cell
LCD Display
1.717V/cell ~ 1.8V/cell
Load >50%
1.8 ~ 1.883V/cell
> 1.883 V/cell
< 1.817V/cell
1.817V/cell ~ 1.9V/cell
50%> Load > 20%
1.9 ~ 1.983V/cell
> 1.983
< 1.867V/cell
1.867V/cell ~ 1.95V/cell
Load < 20%
1.95 ~ 2.033V/cell
> 2.033
Load Information
Indicates overload.
Indicates the load level by 0-24%, 25-50%, 50-74% and 75-100%.
0%~25% 25%~50% 50%~75% 75%~100%
Mode Operation Information
Indicates unit connects to the mains.
Indicates unit connects to the PV panel.
Indicates load is supplied by utility power.
Indicates the utility charger circuit is working.
Mute Operation
Indicates the DC/AC inverter circuit is working.
Indicates unit alarm is disabled.
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LCD Setting
After pressing and holding ENTER button for 3 seconds, the unit will enter setting mode. Press “UP” or “DOWN” button to select setting programs. And then, press “ENTER” button to confirm the selection or ESC button to exit.
Setting Programs:
Program Description Selectable option
Escape
00 Exit setting mode
01
02
Output source priority:
To configure load power source priority
Maximum charging current:
To configure total charging current for solar and utility chargers.
(Max. charging current = utility charging current + solar charging current)
Solar first
Utility first (default)
Solar energy provides power to the loads as first priority.
If solar energy is not sufficient to power all connected loads, battery energy will supply power the loads at the same time.
Utility provides power to the loads only when any one condition happens:
- Solar energy is not available
- Battery voltage drops to low-level warning voltage or the setting point in program 12.
Utility will provide power to the loads as first priority.
Solar and battery energy will provide power to the loads only when utility power is not available.
SBU priority
Solar energy provides power to the loads as first priority.
If solar energy is not sufficient to power all connected loads, battery energy will supply power to the loads at the same time.
Utility provides power to the loads only when battery voltage drops to either low-level warning voltage or the setting point in program 12.
Available options only for InvertFlex 1K/2K/3K model
10A (Only available for 1K model)
20A
30A 40A
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03
04
05
06
07
09
50A (default)
Available options only for InvertFlex 5K model
60A 70A
80A 90A
100A 110A
AC input voltage range
Power saving mode enable/disable
Appliances (default) If selected, acceptable AC input
UPS voltage range will be within
90-280VAC.
If selected, acceptable AC input
Saving mode disable
(default) voltage range will be within
170-280VAC.
If disabled, no matter connected load is low or high, the on/off status of inverter output will not be effected.
Saving mode enable If enabled, the output of inverter will be off when connected load is pretty
AGM (default) low or not detected.
Flooded
Battery type
User-Defined
Auto restart when overload occurs
Restart disable
(default)
If “User-Defined” is selected, battery charge voltage and low DC cut-off voltage can be set up in program 26,
27 and 29.
Restart enable
Auto restart when over temperature occurs
Restart disable
(default)
Restart enable
50Hz (default) 60Hz
Output frequency
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Available options in InvertFlex 1K model:
10A 20A (default)
Available options in InvertFlex 2K/3K model:
20A 30A (default)
Maximum utility charging current
Note: If setting value in program 02 is smaller than that in program in 11, the inverter will apply charging current from program 02 for utility charger.
Available options in 5K model:
2A
20A
10A
30A (default)
40A 50A
60A
Available options in InvertFlex 1K model:
11.0V 11.3V
12
12.0V
12.3V
Setting voltage point back to utility source when selecting “SBU priority” or
“Solar first” in program 01.
12.5V 12.8V
Available options in InvertFlex 2K/3K model:
22.0V 22.5V
23.0V (default) 23.5V
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24.0V 24.5V
25.0V 25.5V
Available options in InvertFlex 5K model:
44V 45V
46V (default) 47V
48V 49V
13
Setting voltage point back to battery mode when selecting “SBU priority” or
“Solar first” in program 01.
50V 51V
Available options in InvertFlex 1K model:
Battery fully charged 12.0V
12.3V 12.5V
12.8V
13.3V
13.0V
13.5V (default)
13.8V 14.0V
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Setting voltage point back to battery mode when selecting “SBU priority” or
“Solar first” in program 01.
14.3V
Available options in InvertFlex 2K/3K model:
Battery fully charged 24V
24.5V
25.5V
26.5V
25V
26V
27V (default)
27.5V
28.5V
14.5V
28V
29V
Available options in InvertFlex 5K model:
Battery fully charged 48V
49V 50V
51V 52V
53V 54V (default)
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55V 56V
58V 57V
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18
19
20
22
Charger source priority:
To configure charger source priority
If this inverter/charger is working in Line, Standby or Fault mode, charger source can be programmed as below:
Solar first Solar energy will charge battery as first priority.
Utility will charge battery only when solar energy is not available.
Utility first
Solar and Utility
(default)
Utility will charge battery as first priority.
Solar energy will charge battery only when utility power is not available.
Solar energy and utility will charge battery at the same time.
Only Solar Solar energy will be the only charger source no matter utility is available or not.
If this inverter/charger is working in Battery mode or Power saving mode, only solar energy can charge battery. Solar energy will charge battery if it's available and sufficient.
Alarm on (default) Alarm off
Alarm control
Auto return to default display screen
Backlight control
Beeps while primary source is interrupted
Return to default display screen
(default)
Stay at latest screen
If selected, no matter how users switch display screen, it will automatically return to default display screen (Input voltage
/output voltage) after no button is pressed for 1 minute.
If selected, the display screen will stay at latest screen user finally switches.
Backlight on
(default)
Backlight off
Alarm on (default) Alarm off
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25
Overload bypass:
When enabled, the unit will transfer to line mode if overload occurs in battery mode.
Bypass disable
(default)
Bypass enable
Record enable Record disable (default)
Record Fault code
1KVA default setting: 14.1V
2K/3KVA default setting: 28.2V
26
Bulk charging voltage
(C.V voltage)
5KVA default setting: 56.4V
If self-defined is selected in program 5, this program can be set up. Setting range is from 12.0V to 14.6V for
InvertFlex 1K model, 24.0V to 29.2V for InvertFlex 2K/3K model and 48.0V to 58.4V for InvertFlex 5K model.
Increment of each click is 0.1V.
1KVA default setting: 13.5V
2K/3KVA default setting: 27.0V
27 Floating charging voltage
5KVA default setting: 54.0V
If self-defined is selected in program 5, this program can be set up. Setting range is from 12.0V to 14.6V for
InvertFlex 1K model, 24.0V to 29.2V for InvertFlex 2K/3K model and 48.0V to 58.4V for InvertFlex 5K model.
Increment of each click is 0.1V.
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1KVA default setting: 10.5V
2K/3KVA default setting: 21.0V
29
31
5KVA default setting: 42.0V
Low DC cut-off voltage
Solar power balance:
When enabled, solar input power will be automatically adjusted according to connected load power.
(Only available for
InvertFlex 5KVA model)
If self-defined is selected in program 5, this program can be set up. Setting range is from 10.0V to 12.0V for
InvertFlex 1K model, 20.0V to 24.0V for InvertFlex 2K/3K model and 40.0V to 48.0V for InvertFlex 5K model.
Increment of each click is 0.1V. Low DC cut-off voltage will be fixed to setting value no matter what percentage of load is connected.
Solar power balance enable (Default):
Solar power balance disable:
If selected, solar input power will be automatically adjusted according to the following formula:
Max. input solar power = Max. battery charging power +
Connected load power.
If selected, the solar input power will be the same to max. battery charging power no matter how much loads are connected. The max. battery charging power will be based on the setting current in program 02.
(Max. solar power = Max. battery charging power)
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Display Setting
The LCD display information will be switched in turns by pressing “UP” or “DOWN” key. The selectable information is switched as below order:
input voltage, input frequency, PV voltage, charging current, battery voltage, output voltage, output frequency, load percentage, load in Watt, load in VA, load in Watt,
DC discharging current, main CPU Version and second CPU Version.
Selectable information LCD display
Input Voltage=230V, output voltage=230V
Input voltage/Output voltage
(Default Display Screen)
Input frequency=50Hz
Input frequency
PV voltage=60V
PV voltage
Charging current=50A
Charging current
Battery voltage=25.5V, discharging current=1A
Battery voltage/ DC discharging current
Output frequency=50Hz
Output frequency
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Load percentage
Load in VA
Load in Watt
Main CPU version checking
Load percent=70%
When connected load is lower than
InvertFlex 1k, load in VA will present xxxVA like below chart.
When load is larger than 1kVA (≧1KVA), load in
VA will present x.xkVA like below chart.
When load is lower than 1kW, load in W will present xxxW like below chart.
When load is larger than 1kW (≧1KW), load in W will present x.xkW like below chart.
Main CPU version 00014.04
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Secondary CPU version 00003.03
Secondary CPU version checking
Operating Mode Description
Operation mode Description LCD display
Charging by utility and PV energy.
Standby mode / Power saving mode
Note:
*Standby mode: The inverter is not turned on yet but at this time, the inverter can charge battery without AC output.
*Power saving mode: If enabled, the output of inverter will be off when connected load is pretty low or not detected.
No output is supplied by the unit but it still can charge batteries.
Charging by utility.
Charging by PV energy.
No charging.
Charging by utility and PV energy. (Only available in InvertFlex 1K/2K/3K model)
Fault mode
Note:
*Fault mode: Errors are caused by inside circuit error or external reasons such as over temperature, output short circuited and so on.
PV energy and utility can charge batteries.
Charging by utility. (Only available in
InvertFlex 1K/2K/3K model)
Charging by PV energy.
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Operation mode Description LCD display
No charging.
Fault mode
Note:
*Fault mode: Errors are caused by inside circuit error or external reasons such as over temperature, output short circuited and so on.
PV energy and utility can charge batteries.
Utility can power loads when the unit starts up without battery. (Only available
InvertFlex 5K model with single operation)
Power from utility
Charging by utility and PV energy.
Line Mode
Battery Mode
The unit will provide output power from the mains. It will also charge the battery at line mode.
Charging by utility.
Power from battery and PV energy.
The unit will provide output power from battery and PV power.
Power from battery only.
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Fault Reference Code
Fault Code
01
Fault Event
Fan is locked when inverter is off.
Icon on
02 Over temperature
03 Battery voltage is too high
04
05
06
Battery voltage is too low
Output short circuited or over temperature is detected by internal converter components.
Output voltage is abnormal. (For InvertFlex 1K/2K/3K model)
Output voltage is too high. InvertFlex(5K model)
Overload time out 07
08 Bus voltage is too high
09 Bus soft start failed
11 Main relay failed
51 Over current or surge
52 Bus voltage is too low
53 Inverter soft start failed
55 Over DC voltage in AC output
56 Battery connection is open
57 Current sensor failed
58 Output voltage is too low
NOTE: Fault codes 51, 52, 53, 55, 56, 57 and 58 are only available in 5K model.
Warning Indicator
Warning
Code
Warning Event
01
Fan is locked when inverter is on.
Audible Alarm
Beep three times every second
Icon flashing
03 Battery is over-charged Beep once every second
04 Low battery Beep once every second
07 Overload Beep once every 0.5 second
10 Output power derating Beep twice every 3 seconds
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SPECIFICATIONS
Table 1 Line Mode Specifications
INVERTER MODEL
Input Voltage Waveform
Nominal Input Voltage
Low Loss Voltage
Low Loss Return Voltage
High Loss Voltage
High Loss Return Voltage
Max AC Input Voltage
Nominal Input Frequency
Low Loss Frequency
Low Loss Return Frequency
High Loss Frequency
High Loss Return Frequency
Output Short Circuit Protection
Efficiency (Line Mode)
Transfer Time
InvertFlex
1K
InvertFlex
2K
InvertFlex
3K
Sinusoidal (utility or generator)
InvertFlex
5K
230Vac
170Vac±7V (UPS);
90Vac±7V (Appliances)
180Vac±7V (UPS);
100Vac±7V (Appliances)
280Vac±7V
270Vac±7V
300Vac
50Hz / 60Hz (Auto detection)
40±1Hz
42±1Hz
65±1Hz
63±1Hz
Circuit Breaker
>95% ( Rated R load, battery full charged )
10ms typical (UPS);
20ms typical (Appliances)
Output Power
Output power derating:
When AC input voltage drops to 170V, the output power will be derated.
Rated Power
50% Power
90V 170V
280V
Input Voltage
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Table 2 Inverter Mode Specifications
INVERTER MODEL
Rated Output Power
1K 2K
InvertFlex
3K
1KVA/0.8KW 2KVA/1.6KW 3KVA/2.4KW
Output Voltage Waveform
Pure Sine Wave
Output Voltage Regulation
230Vac±5%
Output Frequency
Peak Efficiency
Overload Protection
Surge Capacity
Nominal DC Input Voltage
Cold Start Voltage
Low DC Warning Voltage
@ load < 20%
@ 20% ≤ load < 50%
@ load ≥ 50%
Low DC Warning Return Voltage
@ load < 20%
@ 20% ≤ load < 50%
@ load ≥ 50%
Low DC Cut-off Voltage
@ load < 20%
@ 20% ≤ load < 50%
@ load ≥ 50%
High DC Recovery Voltage
High DC Cut-off Voltage
No Load Power Consumption
Saving Mode Power Consumption
InvertFlex
5K
5KVA/4KW
12Vdc
11.5Vdc
11.0Vdc
10.7Vdc
10.1Vdc
11.5Vdc
11.2Vdc
10.6Vdc
10.5Vdc
10.2Vdc
9.6Vdc
14.5Vdc
15.5Vdc
<15W
<5W
24Vdc
23.0Vdc
22.0Vdc
21.4Vdc
20.2Vdc
23.0Vdc
22.4Vdc
21.2Vdc
21.0Vdc
20.4Vdc
19.2Vdc
29Vdc
31Vdc
<20W
<10W
50Hz
90%
[email protected]≥150% load; [email protected]%~150% load
2* rated power for 5 seconds
48Vdc
46.0Vdc
44.0Vdc
42.8Vdc
40.4Vdc
46.0Vdc
44.8Vdc
42.4Vdc
42.0Vdc
40.8Vdc
38.4Vdc
58Vdc
60Vdc
<50W
<15W
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Table 3 Charge Mode Specifications
INVERTER MODEL
InvertFlex
1K
Charging Algorithm
Utility Charging Mode
AC Charging Current
InvertFlex
2K
InvertFlex
3K
3-Step
InvertFlex
5K
10/20Amp 20/30Amp (@V
I/P
=230Vac)
14.6 29.2
2/10/20/30/40/50/
60Amp (@V
I/P
=230Vac)
58.4
Bulk Charging
Voltage
Flooded Battery
AGM / Gel
Battery
Floating Charging Voltage
14.1
13.5Vdc
Battery Voltage, per cell
28.2
27Vdc
56.4
54Vdc
Charging Current, %
2.43Vdc (2.35Vdc)
2.25Vdc
Voltage
100%
Charging Curve
50%
T0 T1
T1 = 10* T0, minimum 10mins, maximum 8hrs
Current
48Vdc
60~72vdc
105Vdc
InvertFlex
5K
110Amp
50Amp
InvertFlex
5K
9.8
Time
Solar Charging Mode
Charging Current (PWM)
System DC Voltage
Operating Voltage Range
Max. PV Array Open Circuit Voltage
Standby Power Consumption
DC Voltage Accuracy
Joint Utility and Solar Charging
12Vdc
15~18Vdc
40Vdc
1W
INVERTER MODEL
InvertFlex
1K
Max Charging Current
Default Charging Current
Table 4 General Specifications
INVERTER MODEL
InvertFlex
1K
Safety Certification
Operating Temperature Range
Storage temperature
Dimension (D*W*H), mm
Net Weight, kg
95 x 240 x
316
5.0
Bulk
(Constant Current)
Absorption
(Constant Voltage)
InvertFlex
2K
50Amp
50Amp
50Amp
24Vdc
30~32Vdc
60Vdc
+/-0.3%
2W
Invert Flex
3K
InvertFlex
2K
Invert Flex
3K
CE
0°C to 55°C
-15°C~ 60°C
100 x 272 x 355
6.4 6.9
Maintenance
(Floating)
120 x 295 x 468
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TROUBLE SHOOTING
Problem
Unit shuts down automatically during startup process.
No response after power on.
Mains exist but the unit works in battery mode.
LCD/LED/Buzzer Explanation / Possible cause
LCD/LEDs and buzzer will be active for 3 seconds and then complete off.
The battery voltage is too low
(<1.91V/Cell)
No indication.
1. The battery voltage is far too low. (<1.4V/Cell)
2. Battery polarity is connected reversed.
Input voltage is displayed as 0 on the
LCD and green LED is flashing.
Input protector is tripped
Green LED is flashing.
Insufficient quality of AC power.
(Shore or Generator)
What to do
1. Re-charge battery.
2. Replace battery.
1. Check if batteries and the wiring are connected well.
2. Re-charge battery.
3. Replace battery.
Check if AC breaker is tripped and AC wiring is connected well.
1. Check if AC wires are too thin and/or too long.
2. Check if generator (if applied) is working well or if input voltage range setting is correct. (UPSAppliance)
Change output source priority to Utility first.
When the unit is turned on, internal relay is switched on and off repeatedly.
LCD display and LEDs are flashing
Battery is disconnected.
Buzzer beeps continuously and red LED is on.
Fault code 07
Fault code 05
Fault code 02
Fault code 03
Fault code 01
Fault code 06/58
Check if battery wires are connected well.
Overload error. The inverter is overload 110% and time is up.
Output short circuited.
Temperature of internal converter component is over 120°C. (Only available for 1-3KVA models)
Internal temperature of inverter component is over 100°C.
Battery is over-charged.
Reduce the connected load by switching off some equipment.
Check if wiring is connected well and remove abnormal load.
Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.
The battery voltage is too high.
Fan fault
Output abnormal (Inverter voltage below than 190Vac or is higher than 260Vac)
Internal components failed.
Return to repair center.
Check if spec and quantity of batteries are meet requirements.
Replace the fan.
1. Reduce the connected load.
2. Return to repair center
Return to repair center.
Fault code
08/09/53/57
Fault code 51
Fault code 52
Fault code 55
Over current or surge.
Bus voltage is too low.
Output voltage is unbalanced.
Restart the unit, if the error happens again, please return to repair center.
Fault code 56
Battery is not connected well or fuse is burnt.
If the battery is connected well, please return to repair center.
31 for more information please visit www.flexston.com
Appendix: Approximate Back-up Time Table
Model
InvertFlex 1K
Model
InvertFlex 2K
Load (VA)
100
200
300
400
500
600
700
800
900
1000
Load (VA)
200
400
600
800
1000
1200
1400
1600
1800
2000
Backup Time @ 12Vdc 100Ah (min) Backup Time @ 12Vdc 200Ah (min)
766 1610
335
198
139
112
95
81
62
766
503
339
269
227
176
140
55
50
125
112
Backup Time @ 24Vdc 100Ah (min) Backup Time @ 24Vdc 200Ah (min)
766 1610
335
198
766
503
139
112
95
81
62
55
50
339
269
227
176
140
125
112
InvertFlex 3K
Model
2100
2400
2700
3000
Load (VA)
500
1000
300
600
900
1200
1500
1800
449
222
124
95
68
56
1100
525
303
227
164
126
48
35
31
28
108
94
74
67
Backup Time @ 48Vdc 100Ah (min) Backup Time @ 48Vdc 200Ah (min)
613 1288
268 613
InvertFlex 5K
1500
2000
2500
3000
3500
4000
4500
158
111
90
76
65
50
44
5000 40 90
Note: Backup time depends on the quality of the battery, age of battery and type of battery.
Specifications of batteries may vary depending on different manufacturers.
402
271
215
182
141
112
100
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