PowMr POW-LVM3.2K-24V 10.2kW Solar System 20W Flexible Monocrystalline Solar Panel User Manual

PowMr POW-LVM3.2K-24V 10.2kW Solar System 20W Flexible Monocrystalline

Solar Panel

Specifications

• Full digital voltage and current double closed loop control
• Advanced SPWM technology for pure sine wave output
• Two output modes: mains bypass and inverter output for uninterrupted power supply
• 4 charging modes: Only Solar, Mains Priority, Solar Priority, and Mains & Solar hybrid charging
• Advanced MPPT technology with 99.9% efficiency
• LCD screen and 3 LED indicators for system data and status display
• ON/OFF rocker switch for AC output control
• Power saving mode to reduce no-load loss
• Intelligent variable speed fan for heat dissipation and system life extension
• Lithium battery activation by PV solar or mains with various protections

Product Usage Instructions

General Information

Product Overview and Features

Ensure to read all safety, installation, and operating instructions in the manual before using the POW-LVM3.2K-24V solar storage inverter. The product features full digital voltage and current control, advanced SPWM technology for pure sine wave output, two output modes, 4 charging modes, and more.

Basic System Introduction

The system includes PV modules, mains or generator connection, battery, household loads, and the solar storage inverter. The inverter is the energy conversion unit of the system. Proper wiring depends on the application scenario.

Installation Instructions

Installation Precautions

• Read the manual carefully before installation.
• Handle the lead-acid battery with care and wear safety goggles.
• Avoid placing metal objects near the battery to prevent short-circuit.
• Ensure good ventilation as acid gas may be generated during battery charging.
• Leave sufficient space around the solar storage for proper installation.

FAQ

Q: What should I do if the LCD screen displays an error message?

A: If you encounter an error message on the LCD screen, refer to the user manual for troubleshooting steps. If the issue persists, contact customer support for assistance.

Q: Can I connect multiple PV modules to the solar storage inverter?

A: Yes, you can connect multiple PV modules to the inverter, ensuring that the total power generated does not exceed the inverter’s specifications. Follow proper wiring guidelines for safe operation.

Important safety instructions

Please keep this manual for future use.

This manual contains all safety, installation and operating instructions for the POW-LVM3.2K-24V solar storage inverter.
Please read all instructions and precautions in the manual carefully before installation and use.

• Non-safety voltage exists inside the solar storage inverter. To avoid personal injury, users shall not disassemble the solar storage inverter themselves. Contact our professional maintenance personnel if their is a need for repair.
• Do not place the solar storage inverter within the reach of children.
• Do not install the solar storage inverter in harsh environments such as moist, oily, flammable or explosive, or heavily dusty areas.
• The mains input and AC output are high voltage, so please do not touch the wiring terminals.
• The housing of the solar storage inverter is hot when it is working. Do not touch it.
• Do not open the terminal protective cover when the solar storage inverter is working.
• It is recommended to attach proper fuse or circuit breaker to the outside of the solar storage inverter.
• Always disconnect the fuse or circuit breaker near the terminals of PV array, mains and battery before installing and adjusting the wiring of the solar storage inverter.
• After installation, check that all wire connections are tight to avoid heat accumulation due to poor connection, which is dangerous.
• The solar storage inverter is off-grid. It is necessary to confirm that it is the only input device for load, and it is forbidden to use it in parallel with other input AC power to avoid damage.

General information

Product overview and features

• POW-LVM3.2K-24V is a new solar storage inverter, which integrates solar energy storage & mains charging energy storage and AC sine wave output. Thanks to DSP control and advanced control algorithm, it has high response speed, high reliability and high industrial standard. Four charging modes are optional, i.e. Only Solar, Mains Priority, Solar Priority and Mains & Solar hybrid charging; and two output modes are available, i.e. Inverter and Mains, to meet different application requirements.

• The solar storage module applies the latest optimized MPPT technology to quickly track the maximum power point of the PV array in any environment and obtain the maximum energy of the solar panel in real time.
  Through a state of the art control algorithm, the AC-DC charging module realizes fully digital voltage and current double closed loop control, with high control precision in a small volume. Wide AC voltage input range and complete input/output protections are designed for stable and reliable battery charging and protection.

• Based on full-digital intelligent design, the DC-AC inverter module employs advanced SPWM technology and outputs pure sine wave to convert DC into AC. It is ideal for AC loads such as household appliances, power tools, industrial equipment, and electronic audio and video equipment. The product comes with a segment LCD display design which allows real-time display of the operating data and status of the system. Comprehensive electronic protections keep the entire system safer and more stable.

Features

1. Full digital voltage and current double closed loop control, advanced SPWM technology, output of pure sine wave.
2. Two output modes: mains bypass and inverter output; uninterrupted power supply.
3. Available in 4 charging modes: Only Solar, Mains Priority, Solar Priority and Mains & Solar hybrid charging.
4. Advanced MPPT technology with an efficiency of 99.9%.
5. Designed with a LCD screen and 3 LED indicators for dynamic display of system data and operating status.
6. ON/OFF rocker switch for AC output control.
7. Power saving mode available to reduce no-load loss.
8. Intelligent variable speed fan to efficiently dissipate heat and extend system life.
9. Lithium battery activation by PV solar or mains, allowing access of lead-acid battery and lithium battery.
10. 360 ° all-round protection with a number of protection functions.
11. Complete protections, including short circuit protection, over voltage and under voltage protection, overload protection, reverse protection, etc.

Basic system introduction
The figure below shows the system application scenario of this product. A complete system consists of the following parts:

1. PV module: Convert light energy into DC power, and charge the battery through the solar storage inverter, or directly invert into AC power to drive the load.
2. Mains or generator: Connected at the AC input, to power the load while charging the battery. If the mains or generator is not connected, the system can also operate normally, and the load is powered by the battery and PV module.
3. Battery: Provided to ensure normal power supply to the system loads when solar energy is insufficient and the Mains is not connected.
4. Household load: Allow connection of various household and office loads, including refrigerators, lamps, TVs, fans and air conditioners.
5. Solar storage inverter: The energy conversion unit of the whole system.

Specific system wiring method depends on the actual application scenario.

Appearance

port

| ⑪| PV input terminal
⑤| Dry contact port| ⑫| Touchable buttons
⑥| Grounding screw hole| ⑬| LED Indicators
⑦| Overload protector| ⑭| LCD screen

Dimension drawing

Installation instructions

Installation precautions

Please read this manual carefully prior to installation to familiarize yourself with the installation steps.

• Be very careful when installing the battery. Wear safety goggles when installing a lead-acid liquid battery. Once coming into contact with the battery acid, rinse with clean water timely.
• Do not place metal objects near the battery to prevent short-circuit of the battery.
• Acid gas may be generated when the battery is charged. So, please ensure good ventilation.
• When installing the cabinet, be sure to leave enough space around the solar storage inverter for heat dissipation. Do not install the solar storage inverter and lead-acid battery in the same cabinet to avoid corrosion by acid gas generated during battery operation.
• Only the battery that meets the requirements of the unit can be charged.
• Poorly connected connections and corroded wires may cause great heat which will melt the wire insulation, burn the surrounding materials, and even cause fires. So, make sure the connectors have been tightened, and the wires are secured with ties to avoid looseness of connections caused by shaking of wires during mobile application.
• The system connection wires are selected according to a current density of not more than 5 A/mm2.
• Avoid direct sunlight and rainwater infiltration for outdoor installation.
• Even after the power is turned off, there is still high voltage inside the unit. Do not open or touch the internal components, and avoid related operations until the capacitor completely discharges.
• Do not install the solar storage inverter in harsh environments such as moist, oily, flammable or explosive, or heavily dusty areas.
• Polarity at the battery input end of this product shall not be reversed, otherwise it may damage the device or cause unpredictable danger.
• The mains input and AC output are high voltage, so please do not touch the wiring terminals.
• When the fan is working, do not touch it to prevent injury.
• It is necessary to confirm that the solar storage inverter is the only input device for load equipment, and it is forbidden to use it in parallel with other input AC power to avoid damage.

Wiring specifications and circuit breaker selection
Wiring and installation must comply with national and local electrical codes.
Recommended PV array wiring specifications and circuit breaker selection: Since the output current of the PV array is affected by the type, connection method and illumination angle of the PV module, the minimum wire diameter of the PV array is calculated according to its short-circuit current; refer to the short-circuit current value in the PV module specification (the short- circuit current is constant when the PV modules are connected in series; the short-circuit current is the sum of the short-circuit currents of all PV modules connected in parallel); the short-circuit current of the PV array shall not exceed the maximum input current.

Refer to the table below for PV input wire diameter and switch:

Models

| Recommended PV wiring diameter| Maximum PV input current| Recommended air switch or circuit breaker type
---|---|---|---
POW- LVM3.2K-24V| 8mm2/8AWG| ****

40A

| ****

2P—63A

Note: The voltage in series shall not exceed the maximum PV input open circuit voltage.

Refer to the table below for recommended AC input wire diameter and switch:

Models

| Recommended AC input wiring diameter| Maximum bypass input current| Recommended air switch or circuit breaker type
---|---|---|---
POW- LVM3.2K-24V| 8mm2/8AWG| ****

40A

| ****

2P—63A

Note: There is already an appropriate circuit breaker at the Mains input wiring terminal, so it is not necessary to add one more.

Recommended battery input wire diameter and switch selection:

Models

| Recommended battery wiring diameter| ****

Rated battery discharge current

| Maximum charge current| Recommended air switch or circuit breaker type
---|---|---|---|---
POW- LVM3.2K- 24V| ****

30mm2/2AWG

| ****

140A

| ****

100A

| ****

2P—160A

Recommended AC output wiring specifications and circuit breaker selection:

Models

| Recommended AC output wiring diameter| ****

Rated inverter AC output current

| Maximum bypass output current| Recommended air switch or circuit breaker type
---|---|---|---|---
POW- LVM3.2K- 24V| ****

8mm2/8AWG

| ****

25A

| ****

40A

| ****

2P—63A

Note: The wiring diameter is for reference only. If the distance between the PV array and the solar storage inverter or the distance between the solar storage inverter and the battery is relatively long, using a thicker wire can reduce the voltage drop to improve system performance.
Note: The above are only recommended wiring diameter and circuit breaker. Please select the appropriate wiring diameter and circuit breaker according to actual situations.

Installation and wiring

Installation steps:：

Step 1: Determine the installation position and the space for heat dissipation. Determine the installation position of the solar storage inverter, such as wall surface; when installing the solar storage inverter, ensure that there is enough air flowing through the heat sink, and space of at least 200m to the left and right air outlets of the inverter shall be left to ensure natural convection heat dissipation. Refer to the installation diagram of the whole machine as above.

Warning: Danger of explosion! Never install the solar storage inverter and lead-acid battery in the same confined space! Also do not install in a confined place where battery gas may collect.

Step 2: Remove the terminal cover

Step3: Wiring

AC input/output wiring method:

1. Prior to AC input/output wiring, disconnect the external circuit breaker and confirm that the wire used is thick enough. Please refer to Section 2.2 “Wiring Specifications and Circuit Breaker Selection”;
2. Properly connect the AC input wire according to the wire sequence and terminal position shown in the figure below. Please connect the ground wire first, and then the live wire and the neutral wire;
3. Properly connect the AC output wire according to the wire sequence and terminal position shown in the figure below. Please connect the ground wire first, and then the live wire and the neutral wire. The ground wire is connected to the grounding screw hole on the cabinet through the O-type terminal.
   Note: The grounding wire shall be as thick as possible (cross-sectional area is not less than 4mm2). The grounding point shall be as close as possible to the solar storage inverter. The shorter the grounding wire, the better.

PV input wiring method:

1. Prior to wiring, disconnect the external circuit breaker and confirm that the wire used is thick enough. Please refer to Section 2.2 “ Wiring Specifications and Circuit Breaker Selection”;
2. Properly connect the PV input wire according to the wire sequence and terminal position shown in the figure below.

BAT wiring method:

1. Prior to wiring, disconnect the external circuit breaker and confirm that the wire used is thick enough. Please refer to Section 2.2 “ Wiring Specifications and Circuit Breaker Selection ” . The BAT wire needs to be connected to the machine through the O-type terminal. The O-type terminal with an inner diameter of 5 mm is recommended. The O-type terminal shall firmly press the BAT wire to prevent excessive heat generation caused by excessive contact resistance.
2. Properly connect the BAT wire according to the wire sequence and terminal position shown in the figure below.

Warnings:

1. Mains input, AC output and PV array will generate high voltage. So, before wiring, be sure to disconnect the circuit breaker or fuse;
2. Be very careful during wiring; do not close the circuit breaker or fuse during wiring, and ensure that the “+” and “-” pole leads of each component are connected properly; a circuit breaker must be installed at the battery terminal. Refer to Section 2.2 “ Wiring Specifications and Circuit Breaker Selection” to select a right circuit breaker. Before wiring, be sure to disconnect the circuit breaker to prevent strong electric sparks and avoid battery short circuit; if the solar storage inverter is used in an area with frequent lightning, it is recommended to install an external lightening arrester at the PV input terminal.

Step 4: Check if the wiring is correct and firm. In particular, check if the battery polarity is reversed, if the PV input polarity is reversed and if the AC input is properly connected.

Step 5: Install the terminal cover.

Step 6: Turn on the solar storage inverter
First, close the circuit breaker at the battery terminal, and then turn the rocker switch on the left side of the machine to the “ON” state. The “AC/INV” indicator flashing indicates that the inverter is working normally. Close the circuit breakers of the PV array and the Mains. Finally, turn on AC loads one by one as the AC output is normal to avoid a protection action caused by a large momentary shock due to simultaneous turning on the loads simultaneously. Now, the machine goes into a normal operation according to the set mode.

Note: If power is supplied to different AC loads, it is recommended to first turn on the load with a large surge current. After the load is stable, turn on the load with a small surge current.
Note: If the solar storage inverter does not work properly or the LCD or indicator is abnormal, refer to Chapter 6 to handle the exceptions.

Operating modes

Charging mode

1. PV priority: PV module will charge the battery preferentially, and the battery is charged by the Mains only when the PV system fails. During the day, solar energy is fully used to charge, while at night, it converts to the Mains. This can maintain battery level, and is ideal for areas where the grid is relatively stable and electricity price is relatively high.
2. Mains priority: The Mains supply is preferentially used to charge the battery. Only when the Mains fails, the PV charging can be activated.
3. Hybrid charging: PV and mains hybrid charging. PV MPPT charging is a priority, and when PV energy is insufficient, the mains supply supplements. When the PV energy is sufficient again, the mains stops charging. This is the fastest charging mode, suitable for the areas where power grid is unstable, providing sufficient backup power supply at any time.
4. Only Solar: Only PV charging, without Mains charging. This is the most energy-efficient way in which battery is charged only by solar panels, and is usually used in areas with good lighting conditions.

Output mode

• PV priority mode:
  When photovoltaic is ineffective, it switches to mains power and charging. This mode maximises the use of solar energy while maintaining battery power, and is suitable for areas with relatively stable power grids.

• Mains priority mode:
  Switch to inverter power supply only when there is no utility power, and switch to utility power charging and supply when utility power recovery. The equipment is as a backup UPS, used in areas with unstable power grid. Switching does not affect the PV charging.

• Inverter priority mode:
  Switches to mains power supply only when the battery discharge undervoltage is lower than the set point ([04] setting item). When the mains-charged battery is above the set point ([05] setting item), it switches to battery discharge mode, cycling the battery charge and discharge. This mode maximises the use of DC energy and is used in areas with stable power grids. Switching does not affect PV charging.

LCD screen operating instructions

Operation and display panel
The operation and display panel is as shown below, including 1 LCD screen, 3 indicators and 4 operation buttons.

Operation buttons introduction

Indicators introduction

AC/INV

| ****

Yellow

| Steady on: Mains output
Flash: Inverter output

CHARGE

| ****

Green

| Flash: Battery charging
Steady on: Charging completed
FAULT| Red| Flash : Fault state

LCD screen introduction

Real-time data viewing method

On the LCD main screen, press the “UP” and “DOWN” buttons to scroll through the real-time data of the machine

Page

|

Parameters on the left side of the screen

| Parameters in the middle of

the screen

|

Parameters on the right side of the screen

---|---|---|---
1| INPUT BATT V

(Battery input voltage)

|

Fault code

| OUTPUT LOAD V  (Output

load voltage)

2| PV TEMP ℃

(PV charger heatsink temperature)

| PV OUTPUT KW

(PV output power)

3| PV INPUT V

(PV input voltage)

| PV OUTPUT A

(PV output current)

4| INPUT BATT A

(Input battery current)

| OUTPUT BATT A

(Battery output current)

5| INPUT BATT KW

(Battery input power)

| OUTPUT BATT KW

(Battery output power)

6| AC INPUT Hz

(AC input frequency)

| AC OUTPUT LOAD Hz

(AC output frequency)

7| AC INPUT V

(AC input voltage)

| AC OUTPUT LOAD A

(AC output load current)

8| INPUT V

(For maintain)

| OUTPUT LOAD KVA

(Load apparent power)

9

| INV TEMP ℃

(AC charge or battery discharge

heatsink temperature)

| INV OUTPUT LOAD KW

(Load active power)

10| APP software version| Bootloader software version
11| Model Battery Voltage Rating| Model Output Power Rating
12| Model PV Voltage Rating| Model PV Current Rating

Setup parameters description

Buttons operation instructions: Press the “ SET ” button to enter the setup menu and exit the setup menu. After entering the setup menu, the parameter number [00] will flash. At this point, press the “ UP” and “ DOWN” buttons to select the code of parameter item to be set. Then, press the “ ENT ” button to enter the parameter editing mode, and the value of the parameter is flashing. Adjust the value of the parameter with the “UP” and “DOWN” buttons. Finally, press the “ENT” button to complete the parameter editing and return to the parameter selection state.

menu

| [00] ESC| Exit the setup menu.

01

|

Work priority mode

|   [01] SOL| PV priority mode, switching to mains when PV is ineffective or the battery is below the value set in

parameter [04].

[01] UTI default| Utility priority mode, switching to inverter only when utility power is not available.
  [01] SBU| Inverter priority mode, switching to mains only when the battery is undervoltage or below the

value set in parameter [04].

02

|

Output frequency

| [02] 50.0

default

| Bypass Adaptive, when there is mains power, it automatically adapts to the frequency when it is first connected to the mains. When there is no mains power, you can set the output frequency through this menu. 230V machine default 50HZ.

120V machine default 60HZ.

  [02] 60.0

03

|

AC input voltage range

|   [03] APL| 230V machine wide range mains input voltage range: 90~280V.

120V machine mains input range: 90~140V.

[03] UPS default| 230V machine narrow range mains input voltage range: 170~280V.

120V machine mains input range: 90~140V.

04

|

Battery to mains

|   [04] 23V default| Parameter [01] = SOL/SBU, the battery voltage is lower than this setting value, the output is switched from inverter to mains, the setting range is 20V~27V. It can not be set higher than

the value of [14] setting item.

05

|

Mains to battery

|   [05] 28V default| Parameter [01] = SOL/SBU, the battery voltage is higher than this setting value, the output is switched from mains to inverter, the setting range is 24V~32V. It cannot be set lower than the value of [04] and [35] setting items.

06

|

Charging mode

|   [06] CSO| PV priority, mains charging only when PV is not effective.
  [06] CUB| Utility priority, PV charging only activated when utility power is outaged.

[06] SNU default| Hybrid charging with PV and utility, prioritizing PV charging, and when PV energy is insufficient, utility charging supplements. When the PV energy is sufficient, the utility stops charging. Note: Only when the utility bypass supply power to the load can the PV and utility be charged at the same time, when the inverter is working, only the PV charging can be started.
[06] OSO| PV charging only, no mains charging.

07

| Max. charging current| [07] 60A default|

120V machine setting range 0~100A;

08

|

Battery type

| [08] USE| User-defined. All battery parameters can be set.
  [08] SLd| Sealed lead-acid battery, constant voltage charging voltage is 28.8V, float charging voltage is 27.6V.
No.| Name| Options| Description
---|---|---|---
| |   [08] FLd| Flooded lead-acid battery, constant voltage charging voltage is 29.2V, float charging voltage is 27.6V.
[08] GEL default| Gel lead-acid battery, constant voltage charging voltage is 28.4V, float charging voltage is 27.6V.

[08] LF07/LF08/LF 09| LF07/LF08/LF09 lithium iron phosphate batteries, corresponding to lithium iron phosphate batteries 7-series, 8-series and 9-series. The default constant voltage charging voltage of 7- series is 24.8V. The default constant voltage charging voltage of 8-series is 28.4V. The default constant voltage charging voltage of 9-series is 31.8V. They are all adjustable.
[08] NCA| Ternary lithium battery, default constant voltage charging voltage is 28.4V, adjustable.

09

|

Boost charging voltage

|   [09] 28.4V

default

| Boost charging voltage setting, setting range 24V~31.6V, step of 0.2V, valid when battery type is user-defined and lithium battery.

10

|

Boost charging maximum time

|

[10] 120

default

| Boost charging maximum time setting, refers to the constant voltage charging when the voltage reaches the parameter [09] setting voltage maximum charging time, set the range of 5min~900min, step of 5 minutes, valid when battery type is user-defined and lithium battery.

11

|

Float charging voltage

|   [11] 27.6V

default

| Float charging voltage, setting range: 24V~29.2V, step of 0.2V, valid when battery type is user- defined.
No.| Name| Options| Description
---|---|---|---

12

|

Over- discharge voltage

|

[12] 21V default| Over-discharge voltage, the battery voltage is lower than this judgement point, delay the time set by parameter [13], and then shut down the inverter output. Setting range 20V~28V, step of

0.2 V. Valid when battery type is user-defined and lithium battery.

13

|

Over- discharge delay time

|

[13] 5S default| Over-discharge delay time, when the battery voltage is lower than the parameter [12], the inverter output will shut down after delaying the time set in this parameter. The setting range is 5S~50S, step of 5S. Valid when battery type is user-defined and lithium battery.

14

|

Battery under- voltage alarm point

|

[14] 22V default| Battery under-voltage alarm point, when the battery voltage is lower than the judgment point, report under-voltage alarm, the output does not shut down. The setting range is 20V~28V, step of 0.2V. Valid when battery type is user-defined and lithium battery.

15

|

Battery discharging limit voltage

|   [15] 23.2V

default

| Battery discharging limit voltage, battery voltage is lower than this judgment point, the output will shut down immediately. Setting range 20V~27.2V, step of 0.2V. Valid when battery type is user-defined and lithium battery.

16

|

Equalization charging

| [16] DIS default| Disable equalization charging.
  [16] ENA| Enable equalization charging, only for open lead- acid batteries and sealed lead-acid batteries

17

| Equalize charging voltage|   [17] 29.6V

default

| Equalized charging voltage, setting range 24V~31.6V, step 0.2V. Valid when battery type is flooded lead-acid battery and sealed lead-acid

battery.

18

|

Equalize charging time

|   [18] 120

default

| Equalized charging time, setting range 5min~900min, step of 5 minutes. Valid when battery type is flooded lead-acid battery and

sealed lead-acid battery.

19

|

Equalize charging delay

|   [19] 240

default

| Equalized charging delay, setting range 5min~900min, step of 5 minutes. Valid when battery type is flooded lead-acid battery and

sealed lead-acid battery.

20

| Equalize charging derating time| [20] 30 default| Equalized charging derating time, 0~30days in 1 day steps, valid when battery type is flooded lead-acid battery and sealed lead-acid battery.

21

| Equalize charging enable| [21] DIS

default

| Stop equalisation charging immediately.
[21] ENA| Start equalisation charging immediately.

22

|

Energy-saving Mode

| [22] DIS

default

| Disable energy-saving mode.

[22] ENA| After enabling the energy-saving mode, if the load is empty or lower than 50W, the inverter output will shut down the output after delaying for a period of time. When the load is higher than 50W, the inverter will start automatically.

23

|

Automatic overload restart

|   [23] DIS| Disable automatic overload restart. If an overload occurs shutting down the output, the machine will no longer power up.
  [23] ENA default| Enable automatic overload restart. If overload occurs to shut down the output, the machine delays for 3 minutes and then restarts the output. After accumulating 5 times, it will not restart the machine again.
No.| Name| Options| Description
---|---|---|---

24

|

Automatic over- temperature restart

|   [24] DIS| Disable automatic restart in case of over- temperature, if over- temperature occurs to shut down the output the machine will no longer

switch on the output.

  [24] ENA default| Enable automatic over-temperature restart, if over- temperature occurs to shut down the output, it will restart to switch on the output when the temperature drops down.

25

|

Buzzer alarm

| [25] DIS| Disable alarm.
[25] ENA

default

| Enable alarm.

26

|

Mode change alert

|   [26] DIS| Disable alarm when the state of the main input source changes.
[26] ENA default| Enable alarm when the state of the main input source changes.

27

|

Inverter overload to bypass

|   [27] DIS| Disable automatic switching to mains when the inverter is overloaded.
[27] ENA default| Enable automatic switching to mains when inverter is overloaded.

28

| Max. AC charging current|   [28] 40A default|

Max. charging current setting for AC charging: 0~40A.

29

|

Output split- phase function

| [29] DIS default| Disable this function.
[29] ENA| Enable output with IF transformer.

30

| Machine address

settings

|   [30] 1|

Setting range: 1-254.

32

| RS485

communicatio n

| [32] SLA

default

| RS485 port for PC and remote monitoring.
[32] BMS| RS485 port for BMS communication function.

33

|

BMS

communicatio n protocols

| When [32] setting item = 485, you need to select the corresponding lithium battery manufacturer’s brand for communication.
When [32] = 485, the protocol are: PAC=PACE，RDA=RITAR， AOG=ALLGRAND BATTERY，OLT=OLITER， XWD=SUNWODA, DAQ=DYNESS, WOW=SRNE, PYL=PYLONTECH，SHO=FOX ESS， POW=POWMR

35

| Battery under- voltage recovery point|   [35] 26V default| When the battery is under-voltage, the battery voltage needs to be greater than this setting to restore the battery inverter AC output.

36

| Max. PV charging

current

| [36] 60A default|

Max. PV charging current setting range：0~60A.

37

| Recharge recovery point after battery is

full

|   [37] 26V default| When the battery is fully charged, the inverter stops charging and resumes charging when the battery voltage falls below this voltage value.

38

|

AC output voltage setting (standby mode only)

|

[38] 230Vac default|

100/105/110/120Vac can be set, default 120Vac. AC output power = rated power *(setting voltage value/120)

Battery type parameters

For Lead-acid Battery

Battery type

Parameters

| Sealed lead acid battery

(SLD)

| Gel lead-acid battery (GEL)| Flooded lead acid battery (FLD)|

User-defined (User)

| ****

Adjustable

---|---|---|---|---|---
Overvoltage disconnection voltage| 30V| 30V| 31V| 30V|
Battery fully charged recovery point(setup

item [37])

| ****

26V

| ****

26V

| ****

26V

| ****

18～30V

| ****

√

Equalizing charge voltage| 29.2V| –| 29.6V| 18～30V| ****

√

Boost charge voltage| –| –| –| 18～30V| √
Floating charge voltage| 27.6V| 27.6V| 27.6V| 18～30V| ****

√

Undervoltage alarm voltage([01] fault)| 22.0V| 22.0V| 22.0V| 18～30V| ****

√

Undervoltage alarm voltage recovery point([01] fault)| ****

Undervoltage alarm voltage+0.4V

|
Low voltage disconnection voltage([04] fault)| ****

21.0V

| ****

21.0V

| ****

21.0V

| ****

18～30V

| ****

√

Low voltage disconnection voltage recovery point ([04]

fault)(setup item [35])

| ****

26V

| ****

26V

| ****

26V

| ****

26V

| ****

√

Discharge limit voltage| –| –| –| 18～30V| ****

√

Over-discharge delay time| 5s| 5s| 5s| 1～30s| ****

√

Equalizing charge duration| 120 minutes| –| 120 minutes| 0～600minutes|

√

Equalizing charge

interval

| 30 days| –| 30 days| 0～250 days| ****

√

Boost charge duration| –| –| –| 10～600

minutes

| ****

√

For Lithium Battery

Battery type

Parameters

| ****

Ternary (N07)

| ****

Ternary (N08)

| ****

LFP(LF07)

| ****

LFP(LF08)

| ****

LFP(LF09)

| ****

Adjustable

---|---|---|---|---|---|---
Overvoltage disconnection voltage| ****

31.6V

| ****

33.0V

| ****

30V

| ****

30V

| ****

33V

|
Battery fully charged recovery point(setup item [37])| ****

27.4V

| ****

30.4V

| ****

23.2V

| ****

26.8V

| ****

29.8V

| ****

√

Equalizing charge voltage| –| –| –| –| –|
Boost charge voltage| 28.8V| 31.6V| 24.6V| 28.4V| 31.6V| ****

√

Floating charge voltage| 28.8V| 31.6V| 24.6V| 28.4V| 31.6V| ****

√

Undervoltage alarm voltage([01] fault)| 23.4V| 26.8V| 21.6V| 24.8V| 27.8V|

√

Undervoltage alarm voltage recovery

point([01] fault)

| ****

Undervoltage alarm voltage+0.4V

|
Low voltage disconnection

voltage([04] fault)

| ****

21.0V

| ****

24.0V

| ****

21.0V

| ****

24.4V

| ****

27.0V

| ****

√

Low voltage disconnection voltage recovery point ([04]

fault)(setup item [35])

| ****

26.0V

| ****

29.6V

| ****

23.8V

| ****

27.2V

| ****

30.6V

| ****

√

Discharge limit voltage| 19.6V| 22.4V| 20.4V| 23.2V| 26.2V| ****

√

Over-discharge delay time| 30s| 30s| 30s| 30s| 30s| ****

√

Equalizing charge

duration

| –| –| –| –| –| ****

√

Equalizing charge interval| –| –| –| –| –| ****

√

Boost charge duration| 120

minutes

| 120 minutes| 120 minutes| 120 minutes| 120 minutes| ****

√

Other functions

Dry contact
Working principle: This dry node can control the ON/OFF of the diesel generator to charge the battery. ① Normally, the terminals are that the NC-N point is closed and the NO-N point is open; ② When the battery voltage reaches the low voltage disconnection point, the relay coil is energized, and the terminals turn to that the NO-N point is closed while NC-N point is open. At this point, NO-N point can drive resistive loads: 125VAC/1A, 230VAC/1A, 30VDC/1A.

RS485 communication port

This is RS485 communication port.
RS485/WIFI communication port with the following 2 functions:

1. RS485 communication can be made directly through this port with an optional computer host (stored on CD-ROM) developed by our company.
2. It can also be connected with our self-developed RS485 to WiFi/GPRS communication module via this port. With this module, you can connect our inverters through mobile WiFi/GPRS APP, and you can check the operating parameters and status of the inverters through the mobile APP.

As shown in the figure:
Pin 1 is 5V power supply, pin 2 is GND, pin 7 is RS485-A, and pin 8 is RS485-B.

USB communication port
This is a USB communication port, which can be used for USB communication with the optional PC host software. To use this port, you should install the corresponding “USB to serial chip CH340T driver” and APP in the computer.

Protection

Protective function

1

| PV current/power limiting protection| ****

When charging current or power of the PV array configured exceeds the PV rated, it will charge at the rated.

2

| PV night reverse- current protection| At night, the battery is prevented from discharging through the PV module because the battery voltage is greater than the voltage of PV module.

3

| Mains input over voltage protection| When the mains voltage exceeds 280V (230V model) / 140V (120V model), the mains charging will be stopped and switched to the inverter mode.

4

| Mains input under voltage protection| When the mains voltage is lower than 170V (230V model / UPS mode)

/ 90V (120V model), the mains charging will be stopped and switched to the inverter mode.

5

| Battery over voltage protection| When the battery voltage reaches the overvoltage disconnection point, the PV and the mains will be automatically stopped to charge the battery to prevent the battery from being overcharged and

damaged.

6

| Battery low voltage protection| When the battery voltage reaches the low voltage disconnection point, the battery discharging will be automatically stopped to prevent the battery from being over-discharged and damaged.

7

| Load output short circuit protection| ****

When a short-circuit fault occurs at the load output terminal, the AC output is immediately turned off and turned on again after 1 second.

8

| Heat sink over temperature protection| When the internal temperature is too high, the machine will stop charging and discharging; when the temperature returns to normal, charging and discharging will resume.

9

| ****

Overload protection

| Output again 3 minutes after an overload protection, and turn the output off after 5 consecutive times of overload protection until the machine is re- powered. For the specific overload level and duration, refer to the technical parameters table in the manual.

10

| PV reverse polarity protection| ****

When the PV polarity is reversed, the machine will not be damaged.

---|---|---

11

| AC reverse protection| Prevent battery inverter AC current from being reversely input to bypass.

12

| Bypass over current protection| ****

Built-in AC input overcurrent protection circuit breaker.

13

| Battery input over current protection| When the discharge output current of the battery is greater than the maximum value and lasts for 1 minute, the AC input would switched to load.

14

| ****

Battery input protection

| When the battery is reversely connected or the inverter is short- circuited, the battery input fuse in the inverter will blow out to prevent the battery from being damaged or causing a fire.

15

| Charge short- circuit protection| When the external battery port is short- circuited in the PV or AC charging state, the inverter will protect and stop the output current.

Fault code

Fault code

| ****

Fault name

| Whether it affects the

output or not

| ****

Description

---|---|---|---

【01 】

| ****

BatVoltLow

| ****

Yes

| ****

Battery undervoltage alarm

【02 】

| ****

BatOverCurrSw

| ****

Yes

| Battery discharge average current overcurrent software protection

【03 】

| ****

BatOpen

| ****

Yes

| ****

Battery not-connected alarm

【04 】

| ****

BatLowEod

| ****

Yes

| ****

Battery undervoltage stop discharge alarm

【05 】

| ****

BatOverCurrHw

| ****

Yes

| ****

Battery overcurrent hardware protection

【06 】

| ****

BatOverVolt

| ****

Yes

| ****

Charging overvoltage protection

【07 】

| ****

BusOverVoltHw

| ****

Yes

| ****

Bus overvoltage hardware protection

【08 】

| ****

BusOverVoltSw

| ****

Yes

| ****

Bus overvoltage software protection

【09 】

| PvVoltHigh| No| PV overvoltage protection

【10 】

| PvBuckOCSw| No| Buck overcurrent software protection

【11 】

| ****

PvBuckOCHw

| ****

No

| ****

Buck overcurrent hardware protection

【12 】| bLineLoss| No| Mains power down
【13 】| OverloadBypass| Yes| Bypass overload protection
【14 】| OverloadInverter| Yes| Inverter overload protection
【15 】| AcOverCurrHw| Yes| Inverter overcurrent hardware protection
【16 】| –| –| –
---|---|---|---
【17 】| InvShort| Yes| Inverter short circuit protection
【18 】| –| –| –

【19 】

| OverTemperMppt| No| Buck heat sink over temperature protection

【20 】

| ****

OverTemperInv

| ****

Yes

| Inverter heat sink over temperature protection

【21 】

| FanFail| Yes| Fan failure

【22 】

| ****

EEPROM

| ****

Yes

| ****

Memory failure

【23 】

| ****

ModelNumErr

| ****

Yes

| ****

Model setting error

【24 】| –| –| –
【25 】| –| –| –

【26 】

| ****

RlyShort

| ****

Yes

| Inverted AC output backfills to bypass AC input
【27 】| –| –| –
【28 】| –| –| –

【29 】

| ****

BusShort

| ****

Yes

| ****

Internal battery boost circuit failure

【30 】

| ****

BatCapacityLow1

| ****

No

| ****

Battery capacity below 10% alarm (valid when BMS is enabled)

【31 】

| ****

BatCapacityLow2

| ****

No

| Battery capacity below 5% alarm (valid when BMS is enabled)

【32 】

| ****

BatCapacityLowStop

| ****

Yes

| ****

Battery low capacity shutdown (valid when BMS is enabled)

---|---|---|---

【58 】

| ****

BMS communication fault

| ****

NO

| Check whether the communication cable is connected correctly and whether item [33] is set to the corresponding lithium battery communication protocol

【60 】

| BMS battery low- temperature alarm| ****

NO

| ****

Li-ion battery BMS low-temperature alarm

【61 】

| BMS battery over- temperature alarm| ****

NO

| ****

Li-ion battery BMS over-temperature alarm

【62 】

| BMS battery over- current alarm| ****

NO

| ****

Li-ion battery BMS over-current alarm

【63 】

| BMS battery under- voltage alarm| ****

NO

| ****

Li-ion battery BMS under-voltage alarm

【64 】

| ****

BMS battery over- voltage alarm

| ****

NO

| ****

Li-ion battery BMS over-voltage alarm

Troubleshooting

Fault code| ****

Fault

| ****

Measures

---|---|---

Display

| ****

No display on the screen

| ****

Check if the battery air switch or the PV air switch has been closed; if the switch is in the “ON” state; press any button on the screen to exit the screen sleep mode.

【06】

| Battery overvoltage protection| Measure if the battery voltage exceeds rated, and turn off the PV array air switch and mains air switch.
【01】

【04】

| Battery undervoltage protection| Charge the battery until it returns to the low voltage disconnection recovery voltage.

【21】

| Fan failure| Check if the fan is not turning or blocked by foreign object.

【19】

【20】

| Heat sink over temperature protection| When the temperature of the device is cooled below the recovery temperature, normal charge and discharge control is resumed.
【13】

【14】

| Bypass overload protection, Inverter overload protection| ① Reduce the use of power equipment;

② Restart the unit to resume load output.

【17】

| Inverter short-circuit protection| ① Check the load connection carefully and clear the short-circuit fault points;

② Re-power up to resume load output.

【09】

| PV over-voltage| Use a multimeter to check if the PV input voltage exceeds the maximum allowable input voltage rated.

【03】

| Battery disconnected alarm| Check if the battery is not connected or if the battery circuit-breaker is not closed.

【26】

| ****

Inverted AC output backfills to bypass AC input

| Disconnect the AC input, PV input and battery input. After the screen is off, only connect the battery and start up. If fault 26 is reported, it indicates that the AC input relay switch is short-circuited, and you need to contact the manufacturer to replace it.

System maintenance

In order to maintain the best long-term performance, it is recommended to conduct following checks twice a year.

1. Make sure that the airflow around the unit is not blocked and remove any dirt or debris from the heat sink.
2. Check that all exposed wires are damaged by exposure to sunlight, friction with other objects around them, dryness, bite by insects or rodents, etc., and the wires shall be repaired or replaced if necessary.
3. Verify for the consistency of indication and display with the operation of the device. Please pay attention to the display of any faults or errors, and take corrective actions if necessary.
4. Check all wiring terminals for corrosion, insulation damage, signs of high temperature or burning/discoloration, and tighten the screws.
5. Check for dirt, nesting insects and corrosion, and clean up as required.
6. If the arrester has failed, replace in time to prevent lightning damage to the unit or even other equipment of the user.

Warning: Danger of electric shock! When doing the above operations, make sure that all power supplies of the machine have been disconnected, and all capacitors have been discharged, and then check or operate accordingly!

The company does not assume any liability for damage caused by:

1. Improper use or use in improper site.
2. Open circuit voltage of the PV module exceeds the maximum allowable voltage rated.
3. Temperature in the operating environment exceeds the limited operating temperature range.
4. Disassemble and repair the solar storage inverter without permission.
5. Force majeure: Damage that occurs in transportation or handling of the solar storage inverter.

Technical parameters

AC mode
Rated input voltage| 110/120Vac
Input voltage range| (90Vac~140Vac) ±2%
Frequency| 50Hz/ 60Hz (Auto detection)
Frequency Range| 47±0.3Hz ~ 55±0.3Hz (50Hz);

57±0.3Hz ~ 65±0.3Hz (60Hz);

Overload/short-circuit

protection

| Circuit breaker
Max. efficiency| >92%
Conversion time (bypass and

inverter)

| 10ms (typical)
AC reverse protection| Available
Maximum bypass overload

current

| 40A
Inverter mode
Output voltage waveform| Pure sine wave
Rated output power (VA)| 3200
Rated output power (W)| 3200
Power factor| 1
Rated output voltage (Vac)| 120Vac
Output voltage error| ±5%
Output frequency range (Hz)| 50Hz ± 0.3Hz

60Hz ± 0.3Hz

Max. efficiency| 92%

Overload protection

| (102% < load <110%) : Alarm and shutdown after 5 minutes. (110% < load < 125%): Alarm and shutdown after 10 seconds.

Load >125% ± 10%: Alarm and shutdown after 5 seconds.

Peak power| 6000VA
Rated battery input voltage| 24V (Minimum starting voltage 22V)

Battery voltage range

| ****

20.0Vdc~33Vdc ± 0.3Vdc (undervoltage alarm / shutdown voltage / overvoltage alarm / overvoltage recovery…LCD screen can be set)

---|---
Power saving mode| Load ≤50W
AC charging
Battery type| Lead acid or lithium battery
Max. charging current(can be

set)

| 0-40A
Charge current error| ± 5Adc
Charge voltage range| 20 ~ 33Vdc
Short circuit protection| Circuit breaker and blown fuse
Circuit breaker specifications| 40A
Overcharge protection| Alarm and stop charging after 1 minute
PV charging
Max. PV open-circuit voltage| 108Vdc
PV operating voltage range| 30 ~ 108Vdc
MPPT voltage range| 30 ~ 90Vdc
Battery voltage range| 20 ~ 33Vdc
Maximum input power| 1600W
PV charging current range

(can be set)

| 0-60A
Charging short circuit

protection

| Blown fuse
Wiring protection| Reverse connection protection
Max. hybrid charging current (AC charging + PV charging)
Max. charging current

(can be set)

| 0-100A
Certified specifications
Certification| CE(IEC 62109-1)/

CETL(UL 1741/ CSA C22.2 NO.107.1)

EMC certification level| EN61000, C2
Operating temperature range| -10°C to 55°C
Storage temperature range| -25°C ~ 60°C
---|---
Humidity range| 5% to 95% (Conformal coating protection)
Noise| ≤60dB
Heat dissipation| Forced air cooling, variable speed of fan
Communication interface| USB / CAN / RS485(WiFi/GPRS) / Dry contact
Size| 378280103mm
Weight| 6.8kg

SHENZHEN HEHEJIN INDUSTRIAL CO., LTD

• Tel/Fax: +86 755-28219903
• Email: support@powmr.com
• Web: www.powmr.com
• Add: Henggang Street, Longgang District, Shenzhen, Guangdong, China

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