1. Product Overview
The EASUN POWER Hybrid Solar Inverter/Charger is a versatile device designed to provide reliable power for various applications. It integrates a pure sine wave inverter, an MPPT solar charge controller, and a battery charger into one compact unit. This manual provides detailed instructions for the safe and efficient operation of your inverter.
Key Features:
- Pure sine wave solar inverter
- High PV input voltage range (60V-500VDC)
- Built-in MPPT solar charge controller
- Ability to run without a battery (PV voltage needs to be above 160V)
- WIFI-GPRS remote monitoring capability
- Auto restart function upon AC recovery
- Configurable AC/Solar Charging priority via LCD setting
- Comprehensive overload, over temperature, and short circuit protection
System Diagram:
Product Display:
Rear Panel Connections:
2. Safety Information
Please read all instructions and warnings carefully before installation and operation.
- 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; 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, ensure positive (+) is connected to positive (+) and negative (-) is connected to negative (-).
- WARNING: Ensure that the AC power source is disconnected before attempting to hardwire it to the unit.
- 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 operated in parallel.
- CAUTION: Appliances such as air conditioners require a 2-3 minute restart delay. If a power shortage occurs and recovers quickly, it can damage connected appliances. Check if your air conditioner has a time-delay function.
3. Unpacking and Inspection
Before installation, carefully inspect the unit. Ensure that nothing inside the package is damaged. You should have received the following items:
- The inverter unit x 1
- User manual x 1
4. Installation
4.1. Preparation
Before connecting any wiring, remove the bottom cover of the inverter by unscrewing the two screws as shown in the video and image below.
4.2. Mounting the Unit
Consider the following points when selecting the installation location:
- Do not mount the inverter on flammable construction materials.
- Mount on a solid surface.
- Install the inverter at eye level for easy LCD display reading.
- The ambient temperature should be between 0°C and 55°C for optimal operation.
- Adhere to the wall vertically.
- Ensure sufficient clearance around the unit for heat dissipation and wiring access.
SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.
4.3. Battery Connection
For safety and compliance, install a separate DC over-current protector or disconnect device between the battery and the inverter. All wiring must be performed by qualified personnel. Use appropriate cables to reduce the risk of injury.
Recommended Battery Cable Specifications:
| Model | Maximum Amperage | Battery Capacity | Wire Size | Cable mm² | L1 (mm) | L2 (mm) | Torque Value |
|---|---|---|---|---|---|---|---|
| All Models | 137A | 100AH | 2AWG | 38 | 3 | 18 | 2~3 Nm |
Connection Steps:
- Remove 18 mm of insulation from the positive and negative cables.
- Connect all battery packs as required by your system.
- Insert battery cables into the inverter's battery connector and tighten bolts to 2-3 Nm. Ensure correct polarity.
4.4. AC Input/Output Connection
Before connecting to the AC input power source, install a separate AC breaker (recommended 50A) between the inverter and the AC source. Do not mis-connect input and output terminals. All wiring must be done by qualified personnel.
Suggested Cable Requirement for AC Wires:
| Model | Gauge | Torque Value |
|---|---|---|
| 2KVA | 12AWG | 1.4~1.6Nm |
| 4KVA | 10AWG | 1.4~1.6Nm |
| 5.5KVA/6.2KVA | 8 AWG | 1.4~1.6Nm |
Connection Steps:
- Open the DC protector or disconnector.
- Remove 10mm insulation for six conductors. Shorten phase L and neutral conductor by 3mm.
- Insert AC input wires according to polarities (L, N, PE) indicated on the terminal block and tighten screws. Connect PE (Ground, yellow-green) first, then L (Line, brown or black), and N (Neutral, blue).
- Insert AC output wires similarly, connecting PE first.
- Ensure all wires are securely connected.
4.5. PV Connection
Install a separate DC circuit breaker between the inverter and PV modules. All wiring must be performed by qualified personnel. Use appropriate cables for PV module connection.
PV Module Selection Parameters:
- Open circuit Voltage (Voc) of PV modules must not exceed the max. PV array open circuit voltage of the inverter.
- Open circuit Voltage (Voc) of PV modules should be higher than the min. battery voltage.
Solar Charging Mode Specifications:
| INVERTER MODEL | 2KVA (PVmax=160V) | 4KVA (PVmax=160V) | 4KVA | 5.5KVA | 6.2KVA |
|---|---|---|---|---|---|
| Max. PV Array Open Circuit Voltage | 160VDC | 500VDC | |||
| PV Array MPPT Voltage Range | 30VDC~160VDC | 60VDC~500VDC | |||
| Max. PV Input Current | 30A | 50A | 15A | 18A | 27A |
PV Module Wire Connection Steps:
- Remove 10 mm insulation from positive and negative conductors.
- Check correct polarity of connection cable from PV modules and PV input connectors. Connect positive (+) to positive (+) and negative (-) to negative (-).
- Ensure wires are securely connected.
4.6. Final Assembly
After all wiring is complete, replace the bottom cover and secure it with the two screws.
5. Operation
5.1. Power ON/OFF
Once the unit is properly installed and batteries are connected, press the On/Off switch (located on the rear panel) to turn on the unit.
5.2. Operation and Display Panel
The front panel features an LCD display, three indicators (INV/AC, CHG, FAULT), and four function buttons (ESC, UP, DOWN, ENTER) to show operating status and input/output power information.
LED Indicator Messages:
| LED Indicator | Messages |
|---|---|
| AC / INV (Green Solid On) | Output is powered by utility in Line mode. |
| AC / INV (Green Flashing) | Output is powered by battery or PV in battery mode. |
| CHG (Green Solid On) | Battery is fully charged. |
| CHG (Green Flashing) | Battery is charging. |
| FAULT (Red Solid On) | Fault occurs in the inverter. |
| FAULT (Red Flashing) | Warning condition occurs in the inverter. |
Function Keys:
| Function Key | Description |
|---|---|
| ESC | To exit setting mode |
| UP | To go to previous selection |
| DOWN | To go to next selection |
| ENTER | To confirm the selection in setting mode or enter setting mode |
5.3. LCD Setting
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.
Key Settings:
- Program 01: Output source priority (Solar first, Utility first, SBU priority, SUB priority) - Configures how the load is powered.
- Program 02: Maximum charging current - Sets total charging current for solar and utility chargers.
- Program 03: AC input voltage range (Appliances, UPS, Generator) - Adjusts acceptable AC input voltage range.
- Program 05: Battery type (AGM, User-Defined, Flooded) - Selects battery type for charging parameters.
- Program 08: Output voltage (220V, 230V, 240V) - Sets the inverter's output voltage.
- Program 09: Output frequency (50Hz, 60Hz) - Sets the inverter's output frequency.
- Program 10: Auto bypass - Determines if the unit automatically bypasses mains power.
- Program 12: Setting voltage point back to utility source - Defines the battery voltage threshold for switching to utility power.
- Program 13: Setting voltage point back to battery mode - Defines the battery voltage threshold for switching back to battery power.
- Program 20: Backlight control (On/Off) - Controls the LCD backlight.
- Program 23: Overload bypass - Enables/disables transfer to line mode during overload in battery mode.
- Program 26: Bulk charging voltage (C.V voltage) - Sets the bulk charging voltage.
- Program 27: Floating charging voltage - Sets the floating charging voltage.
- Program 29: Low DC cut-off voltage - Sets the low DC cut-off voltage.
5.4. Battery Equalization
The equalization function helps reverse the buildup of negative chemical effects and removes sulfate crystals from battery plates, which can reduce battery capacity. It is recommended to equalize the battery periodically.
How to Apply Equalization:
- Enable battery equalization in LCD setting program 33.
- Set the equalization interval in program 37, or activate equalization immediately in program 39.
When to Equalize:
In the float stage, when the set equalization interval is reached or immediately activated, the controller will enter the Equalize stage.
5.5. Setting for Lithium Battery
If using a lithium battery, ensure it is a compatible model. Connect the BMS communication cable between the battery and the inverter. This cable transmits information and signals between the battery and inverter.
Lithium Battery LCD Display Information:
Setting for PYLON US2000 Lithium Battery:
This battery type uses 4 Dip Switches to set baud rate and battery group address. 'ON' is upper position (1), 'OFF' is bottom position (0).
- Dip 1 'ON' for baud rate 9600.
- Dip 2, 3, and 4 are reserved for battery group address.
Installation Process:
- Use the RS485 cable to connect the inverter and Lithium battery.
- Switch on the Lithium battery.
- Press and hold the start button on the Lithium battery for more than three seconds to power output.
- Turn on the inverter.
- Select battery type as "Li2" in LCD program 5. If communication is successful, the battery icon will light up on the LCD.
Setting for Lithium Battery Without Communication:
If communication is not used, follow these settings based on your battery's BMS specifications (Max charging voltage, Max charging current, Discharging protection voltage):
- Set battery type as "USE" (user-defined) in program 05.
- Set C.V voltage as Max charging voltage of BMS - 0.5V in program 26.
- Set floating charging voltage as C.V voltage in program 27.
- Set Low DC cut-off voltage ≥ discharging protection voltage of BMS + 2V in program 29.
- Set Max charging current to be less than the Max charging current of BMS in program 02.
6. Troubleshooting
6.1. Fault Reference Code
The inverter displays fault codes to indicate specific issues. Refer to the table below for explanations and solutions.
| Fault Code | Fault Event | Icon on |
|---|---|---|
| 01 | Over temperature of inverter module | 01 |
| 02 | Over temperature of DCDC module | 02 |
| 03 | Battery voltage is too high | 03 |
| 04 | Over temperature of PV module | 04 |
| 05 | Output short circuited. | 05 |
| 06 | Output voltage is too high. | 06 |
| 07 | Overload time out | 07 |
| 08 | Bus voltage is too high | 08 |
| 09 | Bus soft start failed | 09 |
| 10 | PV over current | 10 |
| 11 | PV over voltage | 11 |
| 12 | DCDC over current | 12 |
| 13 | Over current or surge | 13 |
| 14 | Bus voltage is too low | 14 |
| 15 | Inverter failed (Self-checking) | 15 |
| 18 | Op current offset is too high | 18 |
| 19 | Inverter current offset is too high | 19 |
| 20 | DC/DC current offset is too high | 20 |
| 21 | PV current offset is too high | 21 |
| 22 | Output voltage is too low | 22 |
| 23 | Inverter negative power | 23 |
6.2. Warning Indicator
The inverter uses warning codes and audible alarms to indicate non-critical conditions. Refer to the table below.
6.3. General Troubleshooting
This section provides solutions for common issues encountered during operation.
| Problem | LCD/LEDs/Buzzer | Explanation / Possible cause | What to do |
|---|---|---|---|
| Unit shuts down automatically during startup process. | LCD/LEDs and buzzer active for 3 seconds then off. | The battery voltage is too low. | 1. Re-charge battery. 2. Replace battery. |
| No response after power on. | No indication. | 1. Battery voltage is far too low. 2. Battery polarity is connected reversed. | 1. Check if batteries and wiring are connected well. 2. Re-charge battery. 3. Replace battery. |
| Input voltage displayed as 0 on LCD and green LED flashing. | Input protector is tripped. | Check if AC breaker is tripped and AC wiring is connected well. | |
| Mains exist but unit works in battery mode. | Green LED is flashing. | Insufficient quality of AC power (Shore or Generator). | 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. |
| Green LED is flashing. | Set "Solar First" as the priority of output source. | Change output source priority to Utility first. | |
| When unit is turned on, internal relay is switched on and off repeatedly. | LCD display and LEDs are flashing. | Battery is disconnected. | Check if battery wires are connected well. |
| Buzzer beeps continuously and red LED is on. | Fault code 07 | Overload error. The inverter is overload 110% and time is up. | Reduce the connected load by switching off some equipment. |
| Fault code 05 | Output short circuited. | Check if wiring is connected well and remove abnormal load. | |
| Fault code 02 | Internal temperature of inverter component is over 100°C. | Check whether the air flow of the unit is blocked or whether the ambient temperature is too high. | |
| Fault code 03 | Battery is over-charged. The battery voltage is too high. | Return to repair center. Check if spec and quantity of batteries meet requirements. | |
| Fault code 06/22 | Output abnormal (Inverter voltage below 190Vac or higher than 260Vac). | 1. Reduce the connected load. 2. Return to repair center. | |
| Fault code 08/09/15 | Internal components failed. | Return to repair center. | |
| Fault code 13 | Over current or surge. | Restart the unit. If the error happens again, return to repair center. | |
| Fault code 14 | Bus voltage is too low. | If the wires are connected well, return to repair center. |
7. Specifications
7.1. Line Mode Specifications
| INVERTER MODEL | 2KVA (PVmax=160V) | 4KVA (PVmax=160V) | 4KVA | 5.5KVA | 6.2KVA |
|---|---|---|---|---|---|
| Input Voltage Waveform | Sinusoidal (utility or generator) | ||||
| Nominal Input Voltage | 230Vac | ||||
| Low Loss Voltage | 170Vac±7V (UPS); 90Vac±7V (Appliances) | ||||
| Low Loss Return Voltage | 180Vac±7V (UPS); 100Vac±7V (Appliances) | ||||
| High Loss Voltage | 280Vac±7V | ||||
| High Loss Return Voltage | 270Vac±7V | ||||
| Max AC Input Voltage | 300Vac | ||||
| Nominal Input Frequency | 50Hz / 60Hz (Auto detection) | ||||
| Low Loss Frequency | 40±1Hz | ||||
| Low Loss Return Frequency | 42±1Hz | ||||
| High Loss Frequency | 65±1Hz | ||||
| High Loss Return Frequency | 63±1Hz | ||||
| Output Short Circuit Protection | Battery mode: Electronic Circuits | ||||
| Efficiency (Line Mode) | >95% (Rated R load, battery full charged) | ||||
| Transfer Time | 10ms typical (UPS); 20ms typical (Appliances) | ||||
7.2. Inverter Mode Specifications
| INVERTER MODEL | 2KVA (PVmax=160V) | 4KVA (PVmax=160V) | 4KVA | 5.5KVA | 6.2KVA |
|---|---|---|---|---|---|
| Rated Output Power | 2KVA/1.5KW | 4KVA/4KW | 5.5KVA/5.5KW | 6.2KVA/6.2KW | |
| Output Voltage Waveform | Pure Sine Wave | ||||
| Output Voltage Regulation | 230Vac±5% | ||||
| Output Frequency | 50Hz or 60Hz | ||||
| Peak Efficiency | 94% | ||||
| Surge Capacity | 2* rated power for 5 seconds | ||||
| Nominal DC Input Voltage | 12Vdc | 24Vdc | 48Vdc | ||
| Cold Start Voltage | 11.0Vdc | 23.0Vdc | 46.0Vdc | ||
| Low DC Warning Voltage (Just for AGM and Flooded) | 11.0Vdc (load < 20%) 10.7Vdc (20% ≤ load < 50%) 10.1Vdc (load ≥ 50%) | 22.0Vdc (load < 20%) 21.4Vdc (20% ≤ load < 50%) 20.2Vdc (load ≥ 50%) | 44.0Vdc (load < 20%) 42.8Vdc (20% ≤ load < 50%) 40.4Vdc (load ≥ 50%) | ||
| Low DC Warning Return Voltage (Just for AGM and Flooded) | 11.5Vdc (load < 20%) 11.2Vdc (20% ≤ load < 50%) 10.6Vdc (load ≥ 50%) | 23.0Vdc (load < 20%) 22.4Vdc (20% ≤ load < 50%) 21.2Vdc (load ≥ 50%) | 46.0Vdc (load < 20%) 44.8Vdc (20% ≤ load < 50%) 42.4Vdc (load ≥ 50%) | ||
| Low DC Cut-off Voltage (Just for AGM and Flooded) | 10.5Vdc (load < 20%) 10.2Vdc (20% ≤ load < 50%) 9.6Vdc (load ≥ 50%) | 21.0Vdc (load < 20%) 20.4Vdc (20% ≤ load < 50%) 19.2Vdc (load ≥ 50%) | 42.0Vdc (load < 20%) 40.8Vdc (20% ≤ load < 50%) 38.4Vdc (load ≥ 50%) | ||
7.3. Charge Mode Specifications
| INVERTER MODEL | 2KVA (PVmax=160V) | 4KVA (PVmax=160V) | 4KVA | 5.5KVA | 6.2KVA |
|---|---|---|---|---|---|
| Utility Charging Mode | |||||
| Max Charging Current (PV+AC) (@VI/P=230Vac) | 120Amp | 100Amp | 100Amp | 120Amp | |
| Max Charging Current (AC) (@VI/P=230Vac) | 80Amp | ||||
| Bulk Charging Voltage (Flooded Battery) | 14.6Vdc | 29.2Vdc | 58.4Vdc | ||
| Bulk Charging Voltage (AGM / Gel Battery) | 14.1Vdc | 28.2Vdc | 56.4Vdc | ||
| Floating Charging Voltage | 13.5Vdc | 27Vdc | 54Vdc | ||
| Overcharge Protection | 15.5 Vdc | 33Vdc | 63Vdc | ||
| Solar Input | |||||
| Rated Power | 900W | 1500W | 4000W | 5500W | 6500W |
| Max. PV Array Open Circuit Voltage | 160Vdc | 500Vdc | |||
| PV Array MPPT Voltage Range | 30Vdc~160Vdc | 60Vdc~500Vdc | |||
| Max. Input Current | 30A | 50A | 15A | 18A | 27A |
| Max. Charging Current(PV) | 60A | 100A | 100A | 120A | |
7.4. General Specifications
| INVERTER MODEL | 2KVA (PVmax=160V) | 4KVA (PVmax=160V) | 4KVA | 5.5KVA | 6.2KVA |
|---|---|---|---|---|---|
| Operating Temperature Range | -10℃ to 55℃ | ||||
| Storage temperature | -15℃ to 60℃ | ||||
| Humidity | 5% to 95% Relative Humidity (Non-condensing) | ||||
| Dimension (D×W×H), mm | 358x295x105 | 438x295x105 | |||
| Net Weight, kg | 5.8 | 6.2 | 8.2 | 8.7 | |
8. User Tips
- Wi-Fi Module: The inverter includes a Wi-Fi module for remote monitoring. If you receive only the antenna and not the module, please contact customer support immediately.
- Off-Grid Operation: This inverter is designed for off-grid use. It can operate without a battery if the PV voltage is above 160V.
- Generator Compatibility: The inverter can work with a generator as an AC input source. However, be aware that generators can be unstable, which might affect the inverter's output stability.
- Battery-Free Operation: The inverter can function without a battery, provided the PV input voltage is consistently above 160V. It cannot operate without both a battery and an AC grid connection if there is no sufficient PV input.
9. Warranty & Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided with your purchase or contact your vendor. Ensure you have your product model and serial number ready for faster assistance.
A user manual in PDF format is available for download: View User Manual (PDF)
