PowMr POW-HVM6.2K-48V-LIP Hybrid Solar Inverter 6.2KW User Manual
- May 15, 2024
- PowMr
Table of Contents
POW-HVM6.2K-48V-LIP Hybrid Solar Inverter 6.2KW
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Specifications
- Functions: Inverter, MPPT solar charger, battery charger
- Display: LCD display
- Input: AC, PV (solar), battery
- Communication Ports: RS232, RS485
- Size: Portable
Product Usage Instructions
Assembly and Installation
1. Refer to the manual for detailed assembly and installation
instructions.
2. Ensure to connect the unit to the appropriate power sources
following safety guidelines.
Operation
1. Use the function buttons on the unit to configure settings
such as battery charging current and charger priority.
2. Monitor the comprehensive LCD display for system status and
information.
Troubleshooting
If you encounter any issues with the unit:
1. Refer to the troubleshooting section in the manual for common
problems and solutions.
2. Contact a qualified service center if required for repairs or
maintenance.
FAQ
Q: What type of batteries should be used with this unit?
A: Only deep-cycle lead acid type rechargeable batteries should
be used to reduce the risk of injury.
Q: Can this unit power motor-type appliances?
A: Yes, this inverter/charger can power motor-type appliances
such as tube lights, fans, refrigerators, and air conditioners in
home or office environments.
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Table Of Contents
ABOUT THIS MANUAL ……………………………………………………………………………………………………… 1 Purpose
………………………………………………………………………………………………………………………………1 Scope
…………………………………………………………………………………………………………………………………1
SAFETY INSTRUCTIONS …………………………………………………………………………………………………… 1 INTRODUCTION
……………………………………………………………………………………………………………… 2
Features ……………………………………………………………………………………………………………………………..2 Basic System
Architecture ……………………………………………………………………………………………………….2 Product Overview
………………………………………………………………………………………………………………….3 INSTALLATION
……………………………………………………………………………………………………………….. 4 Unpacking and Inspection
……………………………………………………………………………………………………….4 Preparation
………………………………………………………………………………………………………………………….4 Mounting the
Unit………………………………………………………………………………………………………………….4 Battery Connection
………………………………………………………………………………………………………………..5 AC Input/Output Connection
……………………………………………………………………………………………………6 PV Connection
………………………………………………………………………………………………………………………8 Schematic diagram of wiring
cover disassembly hole …………………………………………………………………..10 Final Assembly
……………………………………………………………………………………………………………………10 OPERATION
………………………………………………………………………………………………………………….. 11 Power ON/OFF
……………………………………………………………………………………………………………………11 Operation and Display
Panel…………………………………………………………………………………………………..11 LCD Display
Icons………………………………………………………………………………………………………………..12 LCD
Setting………………………………………………………………………………………………………………………..14 Display Setting
……………………………………………………………………………………………………………………22 Operating Mode Description
…………………………………………………………………………………………………..25 Fault Reference
Code……………………………………………………………………………………………………………28 Warning
Indicator………………………………………………………………………………………………………………..29 BATTERY
EQUALIZATION……………………………………………………………………………………………….. 30 SETTING FOR LITHIUM
BATTERY ……………………………………………………………………………………. 32 SPECIFICATIONS
………………………………………………………………………………………………………….. 37 Table 1 Line Mode Specifications
…………………………………………………………………………………………….37 Table 2 Inverter Mode Specifications
……………………………………………………………………………………….38 Table 3 Charge Mode
Specifications…………………………………………………………………………………………39 Table 4 General
Specifications ………………………………………………………………………………………………..39 TROUBLE SHOOTING
…………………………………………………………………………………………………….. 40 Parallel Installation Guide
……………………………………………………………………………………………… 41 1. Instruction
……………………………………………………………………………………………………………….. 41 2. Package Contents
……………………………………………………………………………………………………… 41 3. Mounting the Unit
……………………………………………………………………………………………………… 41 4. Wiring
Connection……………………………………………………………………………………………………… 42 5. Parallel Operation in
Single phase ……………………………………………………………………………….. 44 6. Support 3-phase equipment
……………………………………………………………………………………….. 47 7. PV Connection
…………………………………………………………………………………………………………… 49 8. LCD Setting and
Display……………………………………………………………………………………………… 50 9. Commissioning
………………………………………………………………………………………………………….. 51 10. Trouble shooting
……………………………………………………………………………………………………… 52
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.
1Before using the unit, read all instructions and cautionary markings on the
unit, the batteries and all appropriate sections of this manual.
2CAUTION –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.
3Do 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.
4To reduce risk of electric shock, disconnect all wirings before attempting
any maintenance or cleaning. Turning off the unit will not reduce this risk.
5CAUTION Only qualified personnel can install this device with battery.
6NEVER charge a frozen battery. 7For 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. 8Be 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. 9Please strictly follow
installation procedure when you want to disconnect AC or DC terminals. Please
refer to INSTALLATION section of this manual for the details. 10Fuse is
provided as over-current protection for the battery supply. 11GROUNDING
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. 12NEVER cause AC output and DC input
short circuited. Do NOT connect to the mains when DC input short circuits.
13Warning!! 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.
1
INTRODUCTION
This is a multi-function inverter/charger, combining functions of inverter,
MPPT 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 Inverter running without battery Built-in MPPT solar
controller 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 kinds of appliances in home or office environment,
including motor-type appliances such as tube light, fan, refrigerator and air
conditioner.
Figure 1 Hybrid Power System
2
Product Overview
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. RS232 communication port 12. Parallel
communication port
(only for parallel model) 13. RS485 communication port 14. Grounding 15. WiFi
module avoidance hole (Only
use WiFi module models to remove) 16. RS485 communication line outlet 17.
Battery positive outlet hole 18. Battery negative outlet hole
NOTE: For parallel model installation and operation, please check the parallel
installation guide for the details. 3
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
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. 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 right 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.
4
Install the unit by screwing three screws. It’s recommended to use M4 or M5 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.
Stripping Length:
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 stripping length(L2) and tinning length(L1)
as below.
Recommended battery cable stripping length (L2) and tinning length(L1)Terminal size:
Model
Maximum Amperage
Battery capacity
Wire Size
Cable mm2
Terminal size(mm)
L
W
D
Torque value
6.2KVA
137A
200AH
2AWG
38
37
18
6.4 2~ 3 Nm
Terminal size:
Please follow below steps to implement battery connection: 1. 6.2KVAMake
positive and negative cables based on recommended terminal size.
2. Connect all battery packs as units requires. It’s suggested to use
recommended battery capacity.
3. Insert battery cable flatly into battery connector of inverter and make
sure the bolts are tightened with torque of 2-3Nm. Make sure polarity at both
the battery and the inverter/charge is correctly connected and battery cables
are tightly screwed to the battery connector.
5
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
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 (-).
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
50A. 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
6.2KVA
8 AWG
1.4~ 1.6Nm
6
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) LLINE (brown or black) NNeutral (blue)
WARNING: Be sure that AC power source is disconnected before attempting to
hardwire it to the unit. 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) LLINE (brown
or black) NNeutral (blue)
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.
7
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”
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.
Model 6.2KVA
Typical Amperage 27A
Cable Size 10 AWG
Torque 1.4~1.6 Nm
PV Module Selection:
When selecting proper PV modules, please be sure to consider below parameters:
1. Open circuit Voltage (Voc) of PV modules not exceeds max. PV array open circuit voltage of inverter.
2. Open circuit Voltage (Voc) of PV modules should be higher than min. battery voltage.
Solar Charging Mode
INVERTER MODEL
6.2KVA
Max. PV Array Open Circuit Voltage
500DC
PV Array MPPT Voltage Range
60VDC~500VDC
Take the 330Wp PV module as an example. After considering above two parameters, the recommended module configurations are listed in the table below.
SOLAR INPUT
Q’ty of panels Total input power
3 pcs in serial
3 pcs
1,350 W
Solar Panel Spec. (reference) – 450Wp – Vmp: 34.67Vdc – Imp: 13.82A – Voc: 41.25Vdc – Isc: 12.98A
4 pcs in serial 5 pcs in serial 6 pcs in serial 7 pcs in serial 8 pcs in serial 9 pcs in serial 10 pcs in serial 11 pcs in serial
4 pcs 5 pcs 6 pcs 7 pcs 8 pcs 9 pcs 10 pcs 11 pcs
1,800 W 2,250 W 2,700 W 3,150 W 3,600 W 4,050 W 4,500 W 4,950 W
12 pcs in serial
12 pcs
5,400 W
6 pieces in serial and 2 sets in parallel
12 pcs
5,400 W
8 pieces in serial and 2 sets in parallel
14 pcs
6,300 W
SOLAR INPUT
Q’ty of panels Total input power
Solar Panel Spec. (reference) – 550Wp – Vmp: 42.48Vdc – Imp: 12.95A – Voc: 50.32Vdc – Isc: 13.70A
3 pcs in serial 4 pcs in serial 5 pcs in serial 6 pcs in serial 7 pcs in serial 8 pcs in serial 9 pcs in serial 4 pieces in serial and 2 sets in parallel
3 pcs 4 pcs 5 pcs 6 pcs 7 pcs 8 pcs 9 pcs 8 pcs
1,650 W 2,200 W 2,750 W 3,300 W 3,850 W 4,400 W 4,950 W 4,400 W
5 pieces in serial and 2 sets in parallel
10 pcs
5,500 W
6 pieces in serial and 2 sets in parallel
12 pcs
6,600 W
8
PV Module Wire Connection: 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.
9
Schematic diagram of wiring cover disassembly hole
1. Use a Phillips screwdriver to remove two screws 2. Remove the baffle
Final Assembly
After connecting all wirings, please put bottom cover back by screwing two s
crews as shown below.
10
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
Solid On Flashing Solid On Flashing Solid On Flashing
Messages Output is powered by utility in Line mode. Output is powered by battery or PV in battery mode. Battery is fully charged. Battery is charging. Fault occurs in the inverter. Warning condition occurs in the inverter.
Function Keys Function Key ESC UP DOWN ENTER
Description 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
11
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.
12
Load Information Indicates overload.
Indicates the load level by 0-24%, 25-49%, 50-74% and 75-100%.
0%~24%
25%~49%
50%~74%
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. Indicates the DC/AC inverter
circuit is working.
Mute Operation Indicates unit alarm is disabled.
13
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
Solar first
Utility first (default)
Output source priority: To
01
configure load power
source priority
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
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 either 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.
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.
SUB priority
Solar energy is charged first and then power to the loads. If solar energy is not sufficient to power all connected loads, Utility energy will supply power to the loads at the same time.
14
10A
20A
Maximum charging
30A
current: To configure total
charging current for solar
02
and utility chargers.
(Max. charging current
50A
= utility charging
current + solar
charging current) 70A
40A 60A (default) 80A
Appliances (default)
If selected, acceptable AC input voltage range will be within 90-280VAC.
UPS
03
AC input voltage range
Generator
If selected, acceptable AC input
voltage range will be within 170-280VAC. If selected, acceptable AC input
voltage range will be within 170280VAC and compatible with generators.
04
Power saving mode enable/disable
Saving mode disable (default)
Saving mode enable
AGM (default)
Note: Because generators are unstable, maybe the output of inverter will be
unstable too. If disabled, no matter connected load is low or high, the on/off
status of inverter output will not be effected.
If enabled, the output of inverter will be off when connected load is pretty
low or not detected. Flooded
05
Battery type
User-Defined
Restart disable
06
Auto restart when overload occurs
Restart disable
07
Auto restart when over temperature occurs
15
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 (default)
Restart enable (default)
08
Output voltage
220V 240V
230V (default)
09
Output frequency
50Hz (default)
Auto bypass When selecting “auto”, if
manual(default)
10
the mains power is normal,
it will automatically bypass,
even if the switch is off.
2A
60Hz auto 10A
20A
30A (default)
11
Maximum utility charging 40A current
50A
60A
70A
80A
Available options in 48V models: Setting range is from 44.0V to 57.2V for 48v model, but The max setting value must be less than the value of program13.
44V
45V
46V (default)
47V
Setting voltage point back to utility source
48V
49V
12
when selecting “SBU
priority” or “Solar first” in
program 01.
50V
51V
52V
53V
54V
55V
13
Setting voltage point back Available options in 48V models:
16
to battery mode when
selecting “SBU priority” or “Solar first” in program 01.
Setting range is from 48V to full (the value of program26-
0.4V), but the max setting value must be more than the value
of program12.
Battery fully charged
48V
(default)
49V
50V
51V
52V
53V
54V
55V
56V
57V
58V
59V
60V
61V
62V
17
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
Utility will charge battery as first priority.
Charger source priority:
16
To configure charger
source priority
Solar and Utility (default)
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.
18
18
Buzzer mode
Mode1 Mode2 Mode3 Mode4(default)
Auto return to
19
default display
screen
Return to default display screen (default)
Stay at latest screen
Backlight on (default)
20
Backlight control
Buzzer mute
The buzzer sounds when the input source changes or there is a specific warning
or fault
The buzzer sounds when there is a specific warning or fault
The buzzer sounds when there is a fault
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 off
Overload bypass: When enabled, the Bypass disable
23
unit will transfer to
line mode if
overload occurs in
battery mode.
Bypass enable(default)
Modbus ID Setting Range 001(default)~247
25
Modbus ID Setting
48V models default setting: 56.4V
Bulk charging
26
voltage (C.V
voltage)
If self-defined is selected in program 5, this program can be set up. Setting
range is from 48.0V to 62.0V for 48v model. But the setting value must be more
than or equal the value of program27. Increment of each click is 0.1V.
48V models default setting: 54.0V
27
Floating charging
voltage
Single: This inverter is used in single phase application.
Parallel: This inverter is operated in parallel system.
28
AC output mode
(Need hardware support)
19
L1 phase
The inverter is operated in L1 phase in 3-phase application
L2 phase
The inverter is operated in L2 phase in 3-phase application
L3 phase
The inverter is operated in L3 phase in 3-phase application
48V models default setting: 42.0V
29
Low DC cut-off voltage
Bulk charging
32
time (C.V
stage)
If self-defined is selected in program 5, this program can be set up. Setting range is from 40.0V to 54.0V for 48v model. The setting value must be less than the value of program12. 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.
Automatically (Default):
If selected, inverter will judge this charging time automatically.
5 min
900 min
The setting range is from 0 min to 900 min. Increment of each click is 5 min.
If “USE” is selected in program 05, this program can be set up.
Battery equalization
Battery equalization disable (default)
33
Battery equalization
If “Flooded” or “User-Defined” is selected in program 05, this program can be set up.
48V models default setting is 58.4V. Setting range is from 48V ~
64V. Increment of each click is 0.1V.
34
Battery equalization
voltage
60min (default)
35
Battery equalized time
120min (default)
36
Battery equalized timeout
Setting range is from 0min to 900min. Increment of each click is 5min. Setting range is from 0min to 900 min. Increment of each click is 5 min.
20
30days (default)
37
Equalization interval
Enable
Setting range is from 1 to 90 days. Increment of each click is 1 day Disable (default)
If equalization function is enabled in program 33, this program can be
Equalization activated set up. If “Enable” is selected in this program, it’s to activate battery
39
immediately
equalization immediately and LCD main page will shows ” “. If
“Disable” is selected, it will cancel equalization function until next
activated equalization time arrives based on program 37 setting. At
this time, ” ” will not be shown in LCD main page.
Default OFF Disable current discharge current protection function
46
Maximum discharge current protection
Only available in Single model. When utility is available, it turns to utility model and battery discharge stops after the battery discharge current exceeded the setting value. When utility is unavailable, warning occurs and battery discharge lasts after the battery discharge current exceeded the setting value.
21
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, MPPT charging current, MPPT charging
power, charging current, charging power, battery voltage, output voltage,
output frequency, load percentage, 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
Input frequency=50Hz
PV voltage
PV voltage=200V
Current 10A
MPPT Charging current
Current < 10A
22
MPPT Charging power Charging current Charging power
MPPT charging power=500W AC and PV charging current=50A PV charging current=50A AC charging current=50A AC and PV charging power=500W PV charging power=500W AC charging power=500W
23
Battery voltage=25.5V, discharging current=1A Battery voltage/ DC discharging current
Output frequency
Output frequency=50Hz
Load percentage
Load percent=70%
When connected load is lower than 1kVA, load in VA will present xxxVA like below chart.
Load in VA
When load is larger than 1kVA (1KVA), load in VA will present x.xkVA like below chart.
24
Load in Watt
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.
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 No output is supplied by the
time, the inverter can charge unit but it still can charge
battery without AC output.
batteries.
*Power saving mode: If
enabled, the output of inverter
will be off when connected load
is pretty low or not detected.
Charging by utility. Charging by PV energy. No charging.
25
Charging by utility and PV energy.
Fault mode
Note:
*Fault mode: Errors are caused by inside circuit error or external reasons such as over
PV energy and utility can charge batteries.
temperature, output short
circuited and so on.
Charging by utility. Charging by PV energy.
No charging.
Line Mode
The unit will provide output power from the mains. It will also charge the battery at line mode.
Charging by utility and PV energy.
Charging by utility. The unit will provide output power from the mains. It will also charge the battery at line mode.
The unit will provide output power from the mains. It will also charge the battery at line mode.
If “solar first” is selected as output source priority and solar energy is not sufficient to provide the load, solar energy and the utility will provide the loads and charge the battery at the same time.
26
Line Mode
if “SUB” is selected as output source priority and battery is connected, solar
energy will charge battery as first priority.
The unit will provide output if solar energy is sufficient for charging, solar
power from the mains. It will and the utility will provide the loads. also
charge the battery at line mode.
If “solar first” is selected as output source priority and battery is not connected, solar energy and the utility will provide the loads.
The unit will provide output power from the mains.
Power from utility.
Power from battery and PV energy.
Battery Mode
PV energy will supply power to the loads and charge battery at the same time
The unit will provide output power from battery and PV power.
Power from battery only.
Power from PV energy only.
27
Fault Reference Code
Fault Code 01
Fault Event Over temperature of inverter module
02
Over temperature of DCDC module
03
Battery voltage is too high
04
Over temperature of PV module
05
Output short circuited.
06
Output voltage is too high.
07
Overload time out
08
Bus voltage is too high
09
Bus soft start failed
10
PV over current
11
PV over voltage
12
DCDC over current
13
Over current or surge
14
Bus voltage is too low
15
Inverter failed (Self-checking)
16
Over DC voltage in AC output
17
Reserved
18
Op current offset is too high
19
Inverter current offset is too high
20
DC/DC current offset is too high
21
PV current offset is too high
22
Output voltage is too low
23
Inverter negative power
Icon on
28
Warning Indicator
Warning Code
02
Warning Event Temperature is too High
Audible Alarm
Beep three times 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
15
PV energy is low
Beep twice every 3 seconds
19
Lithium Battery
Beep once every 0.5 second
communication is failed
Battery low and it isn’t Beep twice every 3 seconds
20
up to the setting value
of program 13
Battery equalization
None
Battery is not connected None
Icon flashing
29
BATTERY EQUALIZATION
Equalization function is added into charge controller. It reverses the buildup
of negative chemical effects like stratification, a condition where acid
concentration is greater at the bottom of the battery than at the top.
Equalization also helps to remove sulfate crystals that might have built up on
the plates. If left unchecked, this condition, called sulfation, will reduce
the overall capacity of the battery. Therefore, it’s recommended to equalize
battery periodically.
How to Apply Equalization Function You must enable battery equalization
function in monitoring LCD setting program 33 first. Then, you may apply this
function in device by either one of following methods:
1. Setting equalization interval in program 37. 2. Active equalization
immediately in program 39. When to Equalize In float stage, when the setting
equalization interval (battery equalization cycle) is arrived, or equalization
is active immediately, the controller will start to enter Equalize stage.
Equalize charging time and timeout In Equalize stage, the controller will
supply power to charge battery as much as possible until battery voltage
raises to battery equalization voltage. Then, constant-voltage regulation is
applied to maintain battery voltage at the battery equalization voltage. The
battery will remain in the Equalize stage until setting battery equalized time
is arrived.
30
However, in Equalize stage, when battery equalized time is expired and battery
voltage doesn’t rise to battery equalization voltage point, the charge
controller will extend the battery equalized time until battery voltage
achieves battery equalization voltage. If battery voltage is still lower than
battery equalization voltage when battery equalized timeout setting is over,
the charge controller will stop equalization and return to float stage.
31
SETTING FOR LITHIUM BATTERY
Lithium Battery Connection
If choosing lithium battery for the inverter, you are allowed to use the
lithium battery only which we have configured. There’re two connectors on the
lithium battery, RS485 port of BMS and power cable. Please follow below steps
to implement lithium battery connection:
1). Assemble battery terminal based on recommended battery cable and terminal
size (same as Lead acid, see section Lead-acid Battery connection for
details).
2). Connect the end of RS485 port of battery to BMS(RS485) communication port
of inverter.
Lithium battery communication and setting
if choosing lithium battery, make sure to connect the BMS communication cable
between the battery and the inverter. This communication cable delivers
information and signal between lithium battery and the inverter. This
information is listed below:
Re-configure charging voltage, charging current and battery discharge cut-off voltage according to the lithium battery parameters.
Have the inverter start or stop charging according to the status of lithium battery. Connect the end of RS485 of battery to RS485 communication port of inverter Make sure the lithium battery RS485 port connects to the inverter is Pin to Pin, the communication cable is inside of package and the inverter RS485 port pin assignment shown as below:
Pin number PIN1 PIN2 PIN7 PIN8
RS485 Port RS485-B RS485-A RS485-A RS485-B
32
LCD setting
After connecting, you need to finish and confirm some settings as follow:
Program Description
Selectable option
AGM (default)
Flooded
05
Battery type
User-Defined
Standard communication Protocol form inverter supplier
Support PYLON US2000 Protocol
Customized Protocol or Support FOX ESS Lithium Battery Protocol
Customized Protocol
Customized Protocol
Setting SOC point
back to utility
source when
43
selecting “SBU
priority” or “Solar
first” in program 01
Setting SOC point
back to battery
mode when
44
selecting “SBU
priority” or “Solar
first “in program
01
45
Low DC cut-off SOC
Default 50%, 5%~50% Settable Default 95%, 60%~100% Settable Default 20%, 3%~30% Settable
Note: Program 43/44/45 are only available with successful communication, they will replace the Program 12/13/29 function, at the same time, program 12/13/29 become unavailable.
LCD Display
If communication between the inverter and battery is successful, there is some information showing on the LCD as follow
Item Description
LCD display will be flashing
1 Communication successful icon
2 Max lithium battery charging voltage 33
Max lithium battery charging voltage is 56.0V.
3 Max lithium battery charging current
4 Lithium battery discharging is forbidden 5 Lithium battery charging is
forbidden 6 Lithium battery SOC(AH)
Max lithium battery charging current is 40A.
will flash once every 1 second will flash once every 2 second
7 Lithium battery SOC(%)
Lithium battery SOC is 63AH and 60%
Setting for PYLON US2000 lithium battery
1). PYLONTECH US2000 lithium battery setting: Dip Switch: There are 4 Dip
Switches that sets different baud rate and battery group address. If switch
position is turned to the “OFF” position, it means “0”. If switch position is
turned to the “ON” position, it means “1”. Dip 1 is “ON” to represent the baud
rate 9600. Dip 2, 3 and 4 are reserved for battery group address. Dip switch
2, 3 and 4 on master battery (first battery) are to set up or change the group
address. NOTE: “1” is upper position and “0” is bottom position.
34
2). Process of install Step 1. Use the RS485 cable to connect inverter and Lithium battery as Fig 1. Step 2. Switch on Lithium battery.
Step 3. Press more than three seconds to start Lithium battery, power output ready.
Step 4. Turn on the inverter.
Step 5. Be sure to select battery type as “Li2” in LCD program 5.
If communication between the inverter and battery is successful, the battery
icon
Setting for lithium battery without communication
on LCD display will light
This suggestion is used for lithium battery application and avoid lithium battery BMS protection without communication, please finish the setting as follow:
1.Before starting settingyou must get the battery BMS specification
A. Max charging voltage
B. Max charging current
C. Discharging protection voltage
2.Set battery type as”USE”user-defined
AGM (default)
Flooded
05
Battery type
User-Defined
If “User-Defined” is selected, battery charge voltage and low DC cut-off voltage can be set up in program 26, 27 and 29.
3. Set C.V voltage as Max charging voltage of BMS-0.5V.
default setting: 56.4V
26
Bulk charging voltage (C.V voltage)
If self-defined is selected in program 5, this program can be set up. Setting range is from48.0V to 62.0V for 48v model. But the setting value must be more than or equal the value of program27. Increment of each click is 0.1V.
35
4. Set floating charging voltage as C.V voltage.
default setting: 54.0V
27
Floating charging voltage
If self-defined is selected in program 5, this program can be set
up. Setting range is from 48.0V to the value of program 26 for
48v model. Increment of each click is 0.1V.
5. Set Low DC cut-off voltage discharging protection voltage of BMS+2V.
default setting: 42.0V
29
Low DC cut-off voltage
If self-defined is selected in program 5, this program can be set up. Setting range is from 40.0V to 54.0V for 48v model. The setting value must be less than the value of program12. 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.
6. Set Max charging current which must be less than the Max charging current of BMS.
10A
20A
30A Maximum charging current:
To configure total charging
current for solar and utility
02
chargers.
50A
(Max. charging current =
utility charging current +
solar charging current)
70A
40A 60A (default) 80A
7. Setting voltage point back to utility source when selecting “SBU priority”
or “Solar first” in program 01.The
setting value must be Low DC cut-off voltage+1Vor else the inverter will have
a warning as battery voltage
low.
Available options in 48V models: 46V (default)
Setting voltage point back
12
to utility source when
selecting “SBU priority” or
“Solar first” in program 01.
Remark:
1.you’d better to finish setting without turn on the inverter(just let the LCD
show, no output); 2.when you finish setting, please restart the inverter.
36
SPECIFICATIONS
Table 1 Line Mode Specifications
INVERTER MODEL
6.2KVA
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
Sinusoidal (utility or generator) 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 Line mode: Circuit Breaker Battery mode:
Electronic Circuits >95% ( Rated R load, battery full charged )
10ms typical (UPS); 20ms typical (Appliances)
Output Power
Output power derating: When AC input voltage drops to 95V or 170V depending on models, the output power will be derated.
Rated Power
50% Power
90V 170V
280V Input Voltage
37
Table 2 Inverter Mode Specifications
INVERTER MODEL Rated Output Power
6.2KVA 6.2KVA/6.2KW
Output Voltage Waveform
Pure Sine Wave
Output Voltage Regulation
230Vac±5%
Output Frequency
60Hz or 50Hz
Peak Efficiency
94%
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%
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
38
Table 3 Charge Mode Specifications
Utility Charging Mode
INVERTER MODEL
Max Charging Current (PV+AC)
MaxCharging Current
(AC)
Bulk Charging Voltage
Flooded Battery AGM / Gel
Battery
Floating Charging Voltage
Overcharge Protection
Charging Algorithm
Battery Voltage, per cell
6.2KVA
120Amp (@ VI/P=230Vac)
80Amp (@ VI/P=230Vac)
58.4Vdc
56.4Vdc
54Vdc 63Vdc 3-Step
2.43Vdc (2.35Vdc) 2.25Vdc
Charging Current, %
Voltage 100%
Charging Curve
50%
T0
T1
T1 = 10* T0, minimum 10mins, maximum 8hrs
Bulk (Constant Current)
Absorption (Constant Voltage)
Current
Maintenance (Floating)
Time
Solar Input
INVERTER MODEL
6.2KVA
Rated Power Max. PV Array Open Circuit Voltage PV Array MPPT Voltage Range Max. Input Current MaxCharging Current(PV)
6500W 500Vdc
60Vdc~500Vdc 27A 120A
Table 4 General Specifications
INVERTER MODEL
6.2KVA
Safety Certification
CE
Operating Temperature Range
-10°C to 55°C
Storage temperature
-15°C~ 60°C
Humidity
5% to 95% Relative Humidity (Non-condensing)
Dimension (DWH), mm Net Weight, kg
450x300x130 9.6
39
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 LCD/LEDs and buzzer will be active for 3 seconds and then
complete off.
No indication.
Input voltage is displayed as 0 on the LCD and green LED is flashing.
Explanation / Possible cause
The battery voltage is too low
1. The battery voltage is far too low. 2. Battery polarity is connected
reversed.
Input protector is tripped
Green LED is flashing.
Insufficient quality of AC power. (Shore or Generator)
When the unit is turned on, internal relay is switched on and off repeatedly.
Green LED is flashing.
Set “Solar First” as the priority of output source.
LCD display and LEDs are flashing
Battery is disconnected.
Fault code 07
Overload error. The inverter is overload 110% and time is up.
Fault code 05
Output short circuited.
Fault code 02
Internal temperature of inverter component is over 100°C.
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.
Check if battery wires are connected well.
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.
Buzzer beeps continuously and red LED is on.
Fault code 03
Fault code 06/22 Fault code 08/09/15
Battery is over-charged.
The battery voltage is too high.
Output abnormal (Inverter voltage below than 190Vac or is higher than 260Vac)
Return to repair center.
Check if spec and quantity of batteries are meet requirements. 1. Reduce the
connected load. 2. Return to repair center
Internal components failed.
Return to repair center.
Fault code 13 Fault code 14 Fault code 16
Another fault code
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.
If the wires is connected well, please return to repair center.
40
Parallel Installation Guide 1. Instruction
This inverter can be used in parallel with two different operation modes. 1.
Parallel operation in single phase with up to 12 units. 2. Maximum 12 units
work together to support three-phase equipment. 10 units support one
phase maximum.
2. Package Contents
In parallel kit, you will find the following items in the package: Parallel
communication cable
3. Mounting the Unit
When installing multiple units, please follow below chart.
NOTE: 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. Be sure
to install each unit in the same level.
41
4. Wiring Connection
NOTICE: It’s requested to connect to battery for parallel operation.
The cable size of each inverter is shown as below:
Recommended battery cable and terminal size for each inverter:
Model 6.2KVA
Wire Size 2AWG
Cable mm2
38
Terminal size(mm)
L WD
Torque value
37 18 6.4 2~ 3 Nm
Terminal size:
WARNING: Be sure the length of all battery cables is the same. Otherwise, there will be voltage difference between inverter and battery to cause parallel inverters not working.
Recommended AC input and output cable size for each inverter:
Model
AWG no.
Torque
6.2KVA
8 AWG
1.4~1.6Nm
You need to connect the cables of each inverter together. Take the battery cables for example: You need to use a connector or bus-bar as a joint to connect the battery cables together, and then connect to the battery terminal. The cable size used from joint to battery should be X times cable size in the tables above. “X” indicates the number of inverters connected in parallel. Regarding AC input and output, please also follow the same principle.
CAUTION!! Please install the breaker at the battery and AC input side. This will ensure the inverter can be securely disconnected during maintenance and fully protected from over current of battery or AC input. The recommended mounted location of the breakers is shown in the figures in Point 5.
Recommended breaker specification of battery for each inverter:
Model
1 unit*
6.2KVA
100A/60VDC
*If you want to use only one breaker at the battery side for the whole system, the rating of the breaker
should be X times current of 1 unit. “X” indicates the number of inverters connected in parallel.
42
Recommended breaker specification of AC input with single phase: Model 2 units 3 units 4 units 5 units 6 units 7 units 8 units 9 units 10 units 11 units 12 units 6.2KVA 100A 150A 200A 250A 300A 350A 400A 450A 500A 550A 600A Note1: Also, you can use 40A breaker (50A for 6.2KVA) for only 1 unit, and each inverter has a breaker at its AC input.
Recommended battery capacity
Inverter parallel numbers
2
3
4
5
6
7
8
9
10 11 12
Battery Capacity 400AH 600AH 800AH 1000AH 1200AH 1400AH 1600AH 1800AH 2000AH 2200AH 2400AH
WARNING! Be sure that all inverters will share the same battery bank. Otherwise, the inverters will
transfer to fault mode.
Communicating with battery BMS in parallel system 1) Only support common battery installation
- Use RJ45 cable to connect any one of inverters (no need to connect to a specific inverter) and Lithium battery.
Simply set this inverter battery type to “Li 2” in LCD program 5. Others should be default value “AGM”. Note: Make sure only one inverter is connected RJ45 cable and only the one is set as Lithium in LCD program 5.
43
5. Parallel Operation in Single phase
Two inverters in parallel: Power Connection
Communication Connection
Three inverters in parallel: Power Connection
44
Communication Connection Four inverters in parallel: Power Connection
Communication Connection
45
Six inverters in parallel: Power Connection Communication Connection Note:
Nmax=12units.
46
6. Support 3-phase equipment
One inverter in each phase: Power Connection
Communication Connection
Three inverters in each phase: Power Connection
Note: It’s up to customer’s demand to pick 10 inverters on any phase. P1:
L1-phase, P2: L2-phase, P3: L3-phase. N=N1+N2+N3,Nmax=12units
N1max=10units is in one phase and one inverter for the other two
phasesN2=N3=1: 47
Power Connection
Note: It’s up to customer’s demand to pick 7 inverters on any phase. P1:
L1-phase, P2: L2-phase, P3: L3-phase. N=N1+N2+N3,Nmax=12units
N1max= N2max =9units is in two phases and one inverter for the one phaseN3=1:
Power Connection
Communication Connection
48
7. PV Connection
Please refer to user manual of single unit for PV Connection. CAUTION: Each
inverter should connect to PV modules separately.
49
8. LCD Setting and Display
Setting Program:
Program
Description
Selectable option
Parallel: This inverter is operated Single: This inverter is used in in
parallel system. single phase application.
(Need hardware support)
28
AC output mode
L1 phase L2 phase
L3 phase
One Inverter (Default):
PV judge condition
(Only apply for
30
setting “Solar first”
in program 1: Output
source priority)
All of Inverters:
50
The inverter is operated in L1 phase in 3-phase application
The inverter is operated in L2 phase in 3-phase application
The inverter is operated in L3 phase in 3-phase application
When “ONE” is selected, as long as one of inverters has been connected to PV
modules and PV input is normal, parallel or 3phase system will continue
working according to rule of “solar first” setting. For example, two units are
connected in parallel and set “SOL” in output source priority. If one of two
units has connected to PV modules and PV input is normal, the parallel system
will provide power to loads from solar or battery power. If both of them are
not sufficient, the system will provide power to loads from utility. When
“ALL” is selected, parallel or 3-phase system will continue working according
to rule of “solar first” setting only when all of inverters are connected to
PV modules. For example, two units are connected in parallel and set “SOL” in
output source priority. When selecting “ALL” in program 30, it’s necessary to
have all inverters connected to PV modules and PV input is normal to allow the
system to provide power to loads from solar and battery power. Otherwise, the
system will provide power to loads from utility.
Fault code display: Fault Code
24
Host loss
Fault Event
Icon on
25
Synchronization loss
26
Incompatible battery type
27
Firmware version inconsistent
Warning code display:
Warning Code
Warning Event
16
CAN communication loss
Icon on
17
AC output mode setting is different
18
Battery voltage detected different
9. Commissioning
Parallel in single phase
Step 1: Check the following requirements before commissioning: Correct wire connection
Ensure all breakers in Line wires of load side are open and each Neutral wires of each unit are
connected together.
Step 2: Turn on each unit and set “PAL” in LCD setting program 28 of each unit. And then shut down all
units. NOET: It’s necessary to turn off switch when setting LCD program. Otherwise, the setting can
not be programmed.
Step 3: Turn on each unit.
LCD display in Master unit
LCD display in Slave unit
NOTE: Master and slave units are randomly defined. If it is master the icon blinks, if it is slave the icon
normally on.
Step 4: Switch on all AC breakers of Line wires in AC input. It’s better to have all inverters connect to
utility at the same time. If detecting AC connection, they will work normally.
LCD display in Master unit
LCD display in Slave unit
51
Step 5: If there is no more fault alarm, the parallel system is completely installed. Step 6: Please switch on all breakers of Line wires in load side. This system will start to provide power to the load.
10. Trouble shooting
Situation
Fault Code
Fault Event Description
Solution
24
Host data loss
1. Check if communication cables are connected well and restart the inverter.
2. If the problem remains, please contact your installer.
25
Synchronization data loss
3. Check if communication cables are connected well and restart the inverter.
1. If the problem remains, please contact your installer.
26
Incompatible battery type
27
Firmware version inconsistent
Warning Code
Situation
Warning Event Description
1. Check the battery type setting to ensure that only the device connected to
the BMS in the system is one of Li1 or Li2 or Li3
2. If the problem remains, please contact your installer.
1. Update all inverter firmware to the same version. 2. Check the version of
each inverter via LCD setting and make sure the
CPU versions are same. If not, please contact your instraller to provide the
firmware to update. 3. After updating, if the problem still remains, please
contact your installer.
Solution
CAN
16
communication
loss
1. Check if communication cables are connected well and restart the inverter. 2. If the problem remains, please contact your installer.
17
AC output mode setting is different.
1. Switch off the inverter and check LCD setting #28.
2. For parallel system in single phase, make sure “PAL” is set on #28. 3. If
the problem remains, please contact your installer.
1. Make sure all inverters share same groups of batteries together.
18
The battery voltage of each inverter is not the same.
2. Remove all loads and disconnect AC input and PV input. Then, check battery voltage of all inverters. If the values from all inverters are close, please check if all battery cables are the same length and same material type. Otherwise, please contact your installer to provide SOP to calibrate battery voltage of each inverter.
3. If the problem still remains, please contact your installer.
52