Introduction
Thank you for choosing our solar energy inverter. This manual will guide you through the setup, operation, and troubleshooting of your device. Please read it carefully before installation and operation.
About This Manual
This manual covers the assembly, installation, operation, and troubleshooting of this device. It includes safety and installation guidelines, as well as information on tools and wiring. Keep this manual for future reference.
About the Product
This is a multifunctional inverter that combines the functions of an inverter, solar charger, and battery charger, providing uninterrupted power supply in one package. The versatile LCD display offers user-friendly and easy-to-operate buttons for configuring battery charging current, AC or solar charging priority, and input voltage range.
Key Components:
- 1. LCD Display
- 2. Status Indicator
- 3. Charging Indicator
- 4. Fault Indicator
- 5. Function Buttons
- 6. Grounding Terminal
- 7. AC Input Terminal
- 8. AC Output Terminal
- 9. Battery Input Terminal
- 10. PV Input Terminal
- 11. Wi-Fi Communication Port
- 12. Power On/Off Switch
Installation
I. Preparation
Inspect the unit for any damage before installation. Ensure the following items are included: solar energy inverter, user manual.
To remove the bottom cover, unscrew the three screws.
II. Unit Installation
Installation Location Considerations:
- Do not mount on flammable materials.
- Mount on a firm surface.
- Install at eye level for easy LCD visibility.
- Optimal operating temperature: 0°C to 55°C.
- Recommended mounting position: vertical against a wall.
- Ensure sufficient clearance around the unit for heat dissipation and cable management (50cm top/bottom, 20cm sides).
WARNING: SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACES ONLY.
Mount the unit using M4 or M5 screws.
III. Connecting the Battery
NOTE: A separate DC power protection or disconnecting device between the battery and inverter is required for safe operation and regulatory compliance.
WARNING: All wiring must be performed by qualified personnel.
Use the correct cable size, strip length (L2), and tinning length (L1) as recommended for safe operation.
| Model | Max. Current | Battery Capacity | Cable Size (AWG) | Cable (mm²) | L1 (mm) | L2 (mm) | Torque |
|---|---|---|---|---|---|---|---|
| 1500W-24 | 70A | 100AH | 6 AWG | 13.3 | 3 | 18 | 2~3 Nm |
| 2500W-24 | 100A | 100AH | 4 AWG | 21.15 | 3 | 18 | 2~3 Nm |
| Other models | 140A | 100AH | 2 AWG | 38 | 3 | 18 | 2~3 Nm |
Steps to connect the battery:
- Strip 18mm of insulation from the positive and negative wires.
- Connect all batteries as required by the unit.
- Insert the battery cable into the inverter's battery connector and tighten the screws to 2-3 Nm. Ensure correct polarity and secure connections.
WARNING: Risk of electric shock due to high battery voltage.
CAUTION: Do not place anything between the flat part of the inverter's terminal and the cable to prevent overheating. Do not apply antioxidant before connecting terminals.
NOTE: Ensure correct polarity (+ to +, - to -) before making the final DC connection or closing the DC switch.
IV. Connecting AC Input/Output
NOTE: Install a separate AC switch between the inverter and the AC power source for safe disconnection during maintenance and overcurrent protection. Recommended AC breaker specification is 50A.
NOTE: Do not mix up the "IN" and "OUT" terminal blocks.
WARNING: All wiring must be performed by qualified personnel.
Use the correct cable size for AC connections.
| Model | Cross Section | Torque Value |
|---|---|---|
| 1.5KVA | 12 AWG | 1.4 ~ 1.6 Nm |
| 2.5KVA/3.5KVA | 10 AWG | 1.4 ~ 1.6 Nm |
| 5.5KVA | 8 AWG | 1.4 ~ 1.6 Nm |
Steps to connect AC input/output:
- Ensure the DC switch is open before connecting AC input/output.
- Strip 10mm of insulation from six wires. Shorten the L and N wires by 3mm.
- Connect AC input wires according to polarity: PE (ground, yellow-green), L (line, brown), N (neutral, blue). Tighten terminal screws. Connect the PE conductor first.
- Connect AC output wires similarly: PE, L, N. Tighten terminal screws. Connect the PE conductor first.
NOTE: Appliances like air conditioners require a 2-3 minute delay before restarting to balance refrigerant. If a power failure occurs and is restored quickly, it may damage connected appliances. Check with the appliance manufacturer for a time-delay function.
V. PV Connection
NOTE: Install a separate DC breaker between the inverter and PV modules.
WARNING: All wiring must be performed by qualified personnel.
Use the correct cable size for PV connections.
| Model | Typical Current | Cable Size | Torque |
|---|---|---|---|
| 1.5KVA | 15A | 12 AWG | 1.4 ~ 1.6 Nm |
| 2.5KVA | 15A | 12 AWG | 1.4 ~ 1.6 Nm |
| 3.5KVA | 15A | 12 AWG | 1.4 ~ 1.6 Nm |
| 5.5KVA | 18A | 12 AWG | 1.4 ~ 1.6 Nm |
| 6.2KVA | 27A | 12 AWG | 1.4 ~ 1.6 Nm |
PV Module Selection:
- The open circuit voltage (Voc) of the PV modules must not exceed the inverter's maximum open circuit voltage.
- The open circuit voltage (Voc) of the PV modules must be higher than the minimum battery voltage.
| Solar Charging Mode | |||
|---|---|---|---|
| INVERTER MODEL | 1.5KW - 3.5KW | 5.5KVA | |
| Max. PV Generator Open-Circuit Voltage | 500V DC | ||
| PV Array MPPT Voltage Range | 30VDC - 500VDC | 60VDC - 500VDC | |
| Max. PV INPUT CURRENT | 15A | 18A |
Example configurations for 450Wp and 550Wp PV modules are provided in the manual.
Connecting PV Module Cables:
- Strip 10mm insulation from positive and negative cables.
- Check polarity and connect positive (+) to positive (+) and negative (-) to negative (-).
- Verify correct connections.
VI. Final Assembly
Replace the bottom cover and tighten the two screws.
Operation
I. Powering On/Off
Press the power switch to turn the unit on after installation and battery connection.
II. Control and Display Panel
The control and display panel on the front of the inverter includes indicators, function buttons, and an LCD display showing operating status and power information.
| LED Indicator | Color | Status | Message |
|---|---|---|---|
| AC/INV | Green | Solid | Output powered directly by mains "Line Mode" |
| Blinking | Output powered by battery or PV in battery mode. | ||
| CHG | Green | Solid | Battery is charged |
| Blinking | Battery is charging | ||
| FAULT | Red | Solid | An error occurred in the inverter. |
| Blinking | A warning occurred in the inverter. |
Button Functions:
- ESC: Exit setting mode.
- UP: Move to the previous setting.
- DOWN: Move to the next option.
- ENTER: Confirm selection or enter setting mode.
III. LCD Display Settings
Press and hold the ENTER button for 3 seconds to enter setting mode. Use UP/DOWN to select programs and ENTER to confirm or ESC to exit.
| Program | Description | Selection Option | Details |
|---|---|---|---|
| 01 | Output Source Priority | Utility Priority | Mains power is supplied first. Solar and battery power is used only when mains power is unavailable. |
| Solar Priority | Solar power is supplied first. If insufficient, battery power is used. Mains power is used only when solar is unavailable or battery voltage is low. | ||
| SBU Priority | Solar power first, then battery. Mains power is used only when battery voltage drops to a low warning level. | ||
| SUB Priority | Solar charges first, then powers loads. Mains power supplies loads if solar is insufficient. | ||
| SUF Priority | Solar powers loads if sufficient. Mains power supplies loads simultaneously. If solar is insufficient, mains power is used. Solar can feed back to the grid if loads are met and battery is charged. | ||
| 02 | Max Charging Current | 60A (default) | Configures total charging current for solar and mains chargers. Range is from AC charging current up to the specified maximum. |
| 03 | AC Input Voltage Range | Appliance (default) | 90 to 280 VAC. |
| UPS | 170 to 280 VAC. | ||
| Generator | 170 to 280 VAC, generator compatible. Note: Inverter output may be unstable with generators. | ||
| 05 | Battery Type | AGM (default) | |
| Flooded | |||
| User Defined | Allows setting battery charging voltage and low DC cutoff voltage in programs 26, 27, and 29. | ||
| Lithium Battery (No Communication) | Default values suitable for lithium batteries without communication. Charging and cutoff voltages can be set in programs 26, 27, and 29. | ||
| 06 | Auto Restart After Overload | Disable Auto Restart | |
| Enable Auto Restart (default) | |||
| 07 | Auto Restart After Over Temperature | Disable Auto Restart | |
| Enable Auto Restart (default) | |||
| 08 | Output Voltage | 220V | |
| 230V (default) | |||
| 240V | |||
| 09 | Output Frequency | 50 Hz (default) | |
| 60 Hz | |||
| 10 | Auto Bypass | Manual (default) | If "auto" is selected, the system automatically switches to bypass when mains power is correct, even if the switch is off. |
| Auto | |||
| 11 | Max Mains Charging Current | 30A (default) | Allowed charging current from 2A up to the specified max AC charging current. |
| 12 | Voltage Setting Point to Mains Source (for SBU/Solar First) | (See manual for specific voltage settings per model) | Sets the voltage point to return to mains power. Must be less than Program 13 setting and greater than Program 29 setting. |
| 13 | Voltage Setting Point to Battery Mode (for SBU/Solar First) | Battery Fully Charged (default) | (See manual for specific voltage settings per model) Sets the voltage point to switch to battery mode. Must be less than Program 26 setting and greater than Program 12 setting. |
| 16 | Charging Source Priority | Solar (default) | Solar priority for battery charging. Mains charges only when solar is unavailable. |
| Solar and Mains Simultaneously | Both solar and mains charge the battery concurrently. | ||
| Solar Only | Solar is the only charging source. | ||
| 18 | Buzzer Mode | Mode 1 | Buzzer disabled. |
| Mode 2 | Buzzer enabled for power source change, warning, or fault. | ||
| Mode 3 | Buzzer enabled for specific warning or fault. | ||
| Mode 4 (default) | Buzzer enabled for fault. | ||
| 19 | Auto Return to Default Display | Return to Default Display (default) | Screen returns to default after 1 minute of inactivity. |
| Stay on Last Screen | Screen remains on the last selected display. | ||
| 20 | Backlight | Backlight On (default) | |
| Backlight Off | |||
| 23 | Overload Bypass | Bypass Disabled | If enabled, the unit switches to mains power during overload in battery mode. |
| Bypass Enabled (default) | |||
| 25 | Modbus ID Setting | Modbus ID Setting: 001 (default) | |
| 26 | Charge Voltage (C.V. Voltage) | (See manual for specific voltage settings per model) | Sets the constant voltage charging stage. Must be equal to or greater than Program 27. |
| 27 | Float Charge Voltage | (See manual for specific voltage settings per model) | Sets the float charging voltage. Must be equal to or less than Program 26. |
| 29 | Low DC Cutoff Voltage | (See manual for specific voltage settings per model) | Sets the voltage at which the unit disconnects from the battery to prevent deep discharge. Must be less than Program 12. |
| 32 | Charge Time Delay (C.V. Phase) | Auto (default) | Inverter automatically evaluates charging time. |
| 5 min | Adjustable from 5 to 900 minutes. | ||
| 900 min | |||
| 33 | Battery Equalization | Equalize Battery (default) | Enables battery equalization. |
| Battery Equalization Off | Disables battery equalization. | ||
| 34 | Equalizing Battery Voltage | (See manual for specific voltage settings per model) | Sets the voltage for the equalization charge. |
| 35 | Battery Equalizing Time | 60 min (default) | Sets the duration of the equalization charge. Adjustable from 0 to 900 minutes. |
| 36 | Battery Equalizing Hold Time | 120 min (factory setting) | Sets the hold time for equalization. Adjustable from 0 to 900 minutes. |
| 37 | Equalizing Interval | 30 days (factory setting) | Sets the interval between equalization charges. Adjustable from 1 to 90 days. |
| 39 | Direct Activated Equalizing | Enabled | Activates battery equalization immediately. "E9" will be displayed. |
| Disabled (default) | Equalization is canceled until the next scheduled equalization. | ||
| 41 | Auto Activation for Lithium Battery | Disable Auto Activation (default) | |
| Enable Auto Activation | If "LIx" is selected and the battery is not detected, the unit automatically activates the lithium battery at the specified time. Requires unit restart. | ||
| 42 | Manual Activation for Lithium Battery | Activation Disabled (default) | This function is only available on models that support lithium battery activation. |
| Manual Activation | If "LIx" is selected and the battery is not detected, you can manually activate the lithium battery at a specific time. | ||
| 46 | Max Discharge Current Protection | Disable Discharge Protection (default) | If mains power is available, the unit switches to mains and stops battery discharge if the set discharge current is exceeded. If no mains power, a warning is displayed, and discharge continues. Range: 20A to 500A. |
| Enable Discharge Protection |
IV. Battery Balancing
The equalization function helps eliminate negative chemical effects like stratification and sulfation. Periodic battery balancing is recommended.
To use the balancing function:
- Enable the battery balancing function in Program 33.
- Set the balancing interval in Program 37 or activate immediately in Program 39.
When equalization is active, the unit enters equalization mode at the set time or when immediately activated. The equalization phase provides maximum power until the set equalization voltage is reached, then maintains that voltage. The process continues until the set equalization time is met or the voltage is reached.
V. Lithium Battery Settings
Settings for Lithium Battery Without Communication
To prevent BMS protection activation when there is no communication between the BMS and the unit, follow these steps:
- Obtain BMS specifications: Max Charge Voltage, Max Charge Current, Discharge Protection Voltage.
- Set Battery Type to "LIB".
- Set C.V. (Charge Voltage) to the battery's maximum charge voltage minus 0.5V.
- Set Float Charge Voltage to the same value as the C.V. voltage.
- Set Low DC Cutoff Voltage to at least the BMS discharge protection voltage plus 2V.
- Set the maximum charging rate to be lower than the battery's maximum specified charging rate.
- Set the voltage point for returning to the power source (Program 12) to be greater than or equal to the Low DC Cutoff Voltage plus 1V.
Notes: Perform settings with the inverter off (LCD display only). Restart the inverter after completing settings.
Error Codes
| Error Code | Description | Icon |
|---|---|---|
| 01 | Inverter module over-temperature | Icon with error number |
| 02 | DCDC module over-temperature | |
| 03 | Battery voltage too high | |
| 04 | PV module over-temperature | |
| 05 | Output short circuit | |
| 06 | Output voltage too high | |
| 07 | Overload - shutdown time | |
| 08 | Bus voltage too high | |
| 09 | Bus soft-start failure | |
| 10 | PV current overload | |
| 11 | PV overvoltage | |
| 12 | DCDC current overload | |
| 13 | Current overload or overvoltage | |
| 14 | Bus voltage too low | |
| 15 | Inverter failure | |
| 18 | OP offset current too high | |
| 19 | Inverter offset current too high | |
| 20 | DC/DC offset current too high | |
| 21 | PV offset current too high | |
| 22 | Output voltage too low | |
| 23 | Inverter negative power |
Warning Indicator
| Code | Message | Alarm | Display Icon |
|---|---|---|---|
| 02 | Temperature too high | Three beeps per second | Icon |
| 04 | Battery low | One beep per second | Icon |
| 07 | Overload | One beep every 0.5 seconds | Icon |
| 10 | Output reduction | Two beeps every 3 seconds | Icon |
| 14 | Fan blocked | None | Icon |
| 15 | Low PV energy | Two beeps every 3 seconds | Icon |
| 19 | Lithium battery communication failure | Beep every 0.5 seconds | Icon |
| 21 | Lithium battery output current too high | None | Icon |
| E9 | Battery equalization | None | Icon |
| bP | Battery not connected | None | Icon |
Specifications
Table 1: Line Mode Specifications
| Inverter Model | 1.5KVA | 1.5KVA | 2.5KVA | 3.5KVA | 5.5KVA |
|---|---|---|---|---|---|
| Input Voltage Waveform | Sinusoidal (Mains or Generator) | ||||
| Nominal Input Voltage | 230V AC | ||||
| Low Voltage Range | 170V AC ± 7V (UPS) / 90V AC ± 7V (Appliance) | ||||
| Low Voltage Return | 180V AC ± 7V (UPS) / 100V AC ± 7V (Appliance) | ||||
| High Voltage Range | 280V AC ± 7V | ||||
| High Voltage Return | 270V AC ± 7V | ||||
| Max AC Input Voltage | 300V AC | ||||
| Nominal Input Frequency | 50 Hz / 60 Hz (Auto-detection) | ||||
| Low Frequency Range | 40 ± 1 Hz | ||||
| Low Frequency Return | 42 ± 1 Hz | ||||
| High Frequency Range | 65 ± 1 Hz | ||||
| High Frequency Return | 63 ± 1 Hz | ||||
| Output Short Circuit Protection | Battery Mode: Electronic circuits | ||||
| Efficiency (Line Mode) | >95% (at nominal load R, battery fully charged) | ||||
| Switching Time | 10 ms typical (UPS) / 20 ms typical (Appliance) | ||||
| Output Power Limit | When AC input voltage drops to 95V or 170V (model dependent), output power is limited. | ||||
Table 2: Inverter Mode Specifications
| Inverter Model | 1.5KVA | 1.5KVA | 2.5KVA | 3.5KVA | 5.5KVA |
|---|---|---|---|---|---|
| Nominal Output Power | 1.5KVA/1.5KW | 2.5KVA/2.5KW | 3.5KVA/3.5KW | 5.5KVA/5.5KW | |
| Output Voltage Waveform | Sine | ||||
| Output Voltage Regulation | 230Vac ± 5% | ||||
| Output Frequency | 50 Hz or 60 Hz | ||||
| Max. Efficiency | 94% | ||||
| Peak Power | 2 * nominal power for 5 seconds | ||||
| Nominal DC Input Voltage | 12 Vdc | 24 Vdc | 48 Vdc | ||
| Cold Start Voltage | 11.0 Vdc | 23.0 Vdc | 46.0 Vdc | ||
| Low DC Warning Voltage (AGM/Flooded) | 11.0 Vdc / 10.7 Vdc / 10.1 Vdc | 22.0 Vdc / 21.4 Vdc / 20.2 Vdc | 40.4 Vdc / 42.8 Vdc / 44.0 Vdc | ||
| Low DC Warning Return Voltage (AGM/Flooded) | 11.5 Vdc / 11.2 Vdc / 10.6 Vdc | 23.0 Vdc / 22.4 Vdc / 21.2 Vdc | 42.4 Vdc / 44.8 Vdc / 46.0 Vdc | ||
| Low DC Cutoff Voltage (AGM/Flooded) | 10.5Vdc / 10.2Vdc / 9.6Vdc | 21.0Vdc / 20.4Vdc / 19.2Vdc | 42.0Vdc / 40.8Vdc / 38.4Vdc | ||
Table 3: Charging Mode Specifications
| Utility Charging Mode | 1.5KVA | 1.5KVA | 2.5KVA | 3.5KVA | 5.5KVA | |
|---|---|---|---|---|---|---|
| Max Charging Current (PV+AC) (@ VI/P=230Vac) | 100Amp | 60 Amp | 100 Amp | 100Amp | 100Amp | |
| Max Charging Current (AC) (@ VI/P=230Vac) | 60 Amp | |||||
| Bulk Mode Charging Voltage | Flooded: 14.6Vdc / AGM/GEL: 14.1Vdc | 29.2VDC / 28.2VDC | 58.4VDC | |||
| Sustaining Charging Voltage | 13.5Vdc | 27VDC | 54VDC | |||
| Overcharge Protection | 16.5Vdc | 32VDC | 63VDC | |||
| Charging Algorithm | 3-stage | |||||
| Charging Curve | Icon | |||||
| Solar Input | 1.5KVA | 1.5KVA | 2.5KVA | 3.5KVA | 5.5KVA |
|---|---|---|---|---|---|
| Nominal Power | 2000W | 2000W | 3000W | 4000W | 5500W |
| Max PV Generator Open Circuit Voltage | 500Vdc | ||||
| PV Array MPPT Voltage Range | 30Vdc~500Vdc | 60Vdc~500Vdc | |||
| Max Input Current | 15A | 15A | 15A | 15A | 18A |
| Max Charging Current (PV) | 100A | 60A | 100A | 100A | 100A |
Table 4: Environmental Specifications
| Model | 1.5KVA | 2.5KVA | 3.5KVA | 5.5KVA |
|---|---|---|---|---|
| Operating Temperature Range | -10°C to 55°C | |||
| Storage Temperature | -15°C to 60°C | |||
| Humidity | 5% to 95% (Non-condensing) | |||
Troubleshooting
| Problem | LCD/LED/Buzzer | Possible Cause | Solution |
|---|---|---|---|
| Unit automatically shuts down during startup. | LCD/LED active for 3s, then shuts down. | Battery voltage too low. | Charge the battery. Replace the battery. |
| No response after startup. | None | Battery voltage too low. Battery polarity reversed. | Check battery and wiring connections. Charge the battery. Replace the battery. |
| Power is available, but operates in battery mode. | Input voltage displayed as 0, green LED blinking. | Overcurrent or input voltage protection activated. | Check if AC switch is off and AC wiring is correct. |
| Green LED blinking. | Poor AC quality (mains or generator). | Check if AC wiring is too thin or too long. Check generator function or input voltage range settings. | |
| Green LED blinking. | "Solar First" set as output source priority. | Change output source priority to "Utility first". | |
| Internal relay repeatedly switches on/off when unit is powered on. | LCD screen and LEDs flash. | Battery disconnected. | Check battery cable connections. |
| Buzzer beeps continuously, red LED is on. | Error Code 07 | Overload error. Inverter overloaded by 110% and time expired. | Reduce load by turning off some appliances. |
| Error Code 05 | Output short circuit. | Check wiring connections and remove abnormal load. | |
| Error Code 02 | Internal component over-temperature (>100°C). | Check for blocked airflow or high ambient temperature. | |
| Error Code 03 | Battery overcharged. Battery voltage too high. | Check if battery specification and quantity meet requirements. | |
| Error Code 06/22 | Invalid output (inverter voltage <190Vac or >260Vac). | ||
| Error Code 08/09/15 | Internal components defective. | ||
| Error Code 13 | Overload current or overvoltage. | ||
| Error Code 14 | Bus voltage too low. | ||
| Other error code |
Maintenance
- Keep the unit clean with a soft, dry cloth. Do not use chemicals.
- Regularly check power cables and connectors for damage.
- Ensure ventilation openings are clean and unobstructed.
- Avoid contact with water or liquids.
Disposal
This product is subject to WEEE regulations. Dispose of it at an e-waste collection point for safe recycling. Contact the manufacturer or a service center for disposal inquiries.
Warranty and Service Information
The product is covered by a 24-month manufacturer's warranty from the date of purchase. The warranty covers material and manufacturing defects. Contact the service department for assistance. The warranty does not cover damage due to misuse, accidents, unauthorized repairs, or attempted disassembly.
