1. Introduction
1.1 Purpose
This manual describes the assembly, installation, operation, and troubleshooting of the EASUN POWER 6.2KW Hybrid Solar Inverter. Please read this manual carefully before installation and operation, and keep it for future reference.
1.2 Scope
This manual provides safety and installation guidelines, as well as information on tools and wiring for the inverter.
1.3 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 with 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
1.4 Basic System Architecture
The following illustration shows a basic application for this inverter/charger. A complete running system includes a generator or utility, and optionally, PV modules.
2. Safety Instructions
WARNING: This chapter contains important safety and operating instructions. Read and keep this manual for future reference.
- Before using the unit, read all instructions and cautionary markings on the unit, the batteries, and all appropriate sections of this manual.
- CAUTION: To reduce the risk of injury, charge only deep-cycle lead-acid type rechargeable batteries. Other types of batteries may burst, causing personal injury and damage.
- Do not disassemble the unit. Take it to a qualified service center when service or repair is required. Incorrect re-assembly may result in a risk of electric shock or fire.
- To reduce the risk of electric shock, disconnect all wirings before attempting any maintenance or cleaning. Turning off the unit will not reduce this risk.
- CAUTION: Only qualified personnel can install this device with a battery.
- NEVER charge a frozen battery.
- For optimum operation of this inverter/charger, please follow the required specifications to select appropriate cable sizes. It is very important to correctly operate this inverter/charger.
- Be very cautious when working with metal tools on or around batteries. A potential risk exists to drop a tool to spark or short circuit batteries or other electrical parts and could cause an explosion.
- Please strictly follow the installation procedure when you want to disconnect AC or DC terminals. Refer to the INSTALLATION section of this manual for details.
- Fuses are provided as over-current protection for the battery supply.
- GROUNDING INSTRUCTIONS: This inverter/charger should be connected to a permanent grounded wiring system. Be sure to comply with local requirements and regulations to install this inverter.
- NEVER cause AC output and DC input short circuits. Do NOT connect to the mains when DC input short circuits.
- Warning!! Only qualified service persons are able to service this device. If errors still persist after following the troubleshooting table, please send this inverter/charger back to a local dealer or service center for maintenance.
3. Product Overview
The EASUN POWER 6.2KW Hybrid Solar Inverter is an all-in-one off-grid inverter with a built-in 120A MPPT controller and pure sine wave output. It supports parallel operation for up to 9 units.
The inverter features an LCD display, status indicator, charging indicator, and fault indicator. Function buttons allow for navigation and setting adjustments.
4. Installation
4.1 Unpacking and Inspection
Before installation, inspect the unit. Ensure nothing inside the package is damaged. The package should contain the unit (x1) and the user manual (x1).
4.2 Preparation
Before connecting any wiring, remove the bottom cover by unscrewing the two screws.
4.3 Mounting the Unit
Consider the following points when selecting where to install the inverter:
- Do not mount the inverter on flammable construction materials.
- Mount on a solid surface.
- Install this inverter at eye level for easy LCD display readability.
- The ambient temperature should be between 0°C and 55°C for optimal operation.
- The recommended installation position is vertically on the wall.
- Ensure sufficient heat dissipation and space for wiring by maintaining at least 20cm clearance on the sides and 50cm above/below the unit.
4.4 Battery Connection
CAUTION: For safety and compliance, install a separate DC over-current protector or disconnect device between the battery and inverter. All wiring must be performed by qualified personnel. Use appropriate cable sizes for battery connection.
Recommended Battery Cable Specifications:
| Model | Maximum Amperage | Battery Capacity | Wire Size | Cable mm² | Torque Value |
|---|---|---|---|---|---|
| 6.2KVA | 137A | 200AH | 2AWG | 38 | 2~3 Nm |
Follow these steps:
- For 6.2KVA, make positive and negative cables based on recommended terminal size.
- Connect all battery packs as units require. It's suggested to use recommended battery capacity.
- Insert battery cable flatly into the battery connector of the inverter and ensure bolts are tightened with a torque of 2-3Nm. Verify correct polarity.
4.5 AC Input/Output Connection
CAUTION: Install a separate AC breaker (50A recommended) between the inverter and the AC input power source. This ensures secure disconnection during maintenance and over-current protection. There are two terminal blocks marked 'IN' and 'OUT'; do not mis-connect them.
Suggested Cable Requirement for AC Wires:
| Model | Gauge | Torque Value |
|---|---|---|
| 6.2KVA | 8 AWG | 1.4~1.6Nm |
Follow these steps:
- Before making AC input/output connections, open the DC protector or disconnector.
- Remove 10mm of insulation sleeve for six conductors. Shorten phase L and neutral conductor by 3mm.
- Insert AC input wires according to polarities (Ground, Line, Neutral) and tighten screws.
- Insert AC output wires according to polarities (Ground, Line, Neutral) and tighten screws.
- Ensure all wires are securely connected.
4.6 PV Connection
CAUTION: Install a DC circuit breaker between the inverter and PV modules. All wiring must be performed by qualified personnel. Use appropriate cable sizes for PV module connection.
Recommended PV Cable Specifications:
| Model | Typical Amperage | Cable Size | Torque |
|---|---|---|---|
| 6.2KVA | 27A | 10 AWG | 1.4~1.6 Nm |
PV Module Selection Parameters:
- Open circuit Voltage (Voc) of PV modules must not exceed the max. PV array open circuit voltage of the inverter (500VDC for 6.2KVA).
- Open circuit Voltage (Voc) of PV modules should be higher than the minimum battery voltage.
4.7 Final Assembly
After connecting all wirings, replace the bottom cover by screwing the two screws back into place.
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 bottom of the case) to turn on the unit.
5.2 Operation and Display Panel
The front panel of the inverter features an LCD display, three indicators (AC/INV, CHG, FAULT), and four function keys (ESC, UP, DOWN, ENTER) to show operating status and input/output power information.
LED Indicators:
| LED Indicator | Color | Messages |
|---|---|---|
| AC / INV | Green | Solid On: Output is powered by utility in Line mode. Flashing: Output is powered by battery or PV in battery mode. |
| CHG | Green | Solid On: Battery is fully charged. Flashing: Battery is charging. |
| FAULT | Red | Solid On: Fault occurs in the inverter. 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 Display Icons
The LCD display information can be switched by pressing the 'UP' or 'DOWN' key. It shows various parameters like input voltage, frequency, PV voltage, charging current, battery voltage, output voltage, load percentage, and more.
Input Source Information:
| Icon | Function description |
|---|---|
| AC | Indicates the AC input. |
| PV | Indicates the PV input. |
| INPUTBATT | Indicates input voltage, input frequency, PV voltage, battery voltage and charger current. |
Configuration Program and Fault Information:
| Icon | Function description |
|---|---|
| 88 | Indicates the setting programs. |
| 8.8 | Indicates the warning and fault codes. |
| Warning: 8.8 flashing with warning code. | Warning: Flashing with warning code. |
| Fault: 8.8 lighting with fault code. | Fault: Lighting with fault code. |
Output Information:
| Icon | Function description |
|---|---|
| OUTPUTBATTLOAD | Indicates output voltage, output frequency, load percent, load in VA, load in Watt and discharging current. |
Battery Information:
| Icon | Function description |
|---|---|
| CHARGING | Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% in battery mode and charging status in line mode. |
Load Information:
| Icon | Function description |
|---|---|
| OVER LOAD | Indicates overload. |
| Load Level | Indicates the load level by 0-24%, 25-49%, 50-74% and 75-100%. |
Mode Operation Information:
| Icon | Function description |
|---|---|
| Mains | Indicates unit connects to the mains. |
| PV Panel | Indicates unit connects to the PV panel. |
| BYPASS | Indicates load is supplied by utility power. |
| Utility Charger | Indicates the utility charger circuit is working. |
| DC/AC Inverter | Indicates the DC/AC inverter circuit is working. |
Mute Operation:
| Icon | Function description |
|---|---|
| Mute | Indicates unit alarm is disabled. |
5.4 LCD Setting
After pressing and holding the ENTER button for 3 seconds, the unit will enter setting mode. Use 'UP' or 'DOWN' to select programs, then 'ENTER' to confirm or 'ESC' to exit.
Refer to pages 17-24 of the User Manual PDF for detailed LCD setting programs and options.
5.5 Operating Mode Description
The inverter operates in various modes, including Line Mode, Battery Mode, Standby Mode, Power Saving Mode, and Fault Mode. Each mode has specific behaviors regarding power source, charging, and output.
Refer to pages 28-30 of the User Manual PDF for detailed operating mode descriptions and diagrams.
6. Battery Equalization
The equalization function helps reverse the buildup of negative chemical effects like stratification and removes sulfate crystals, which can reduce battery capacity if left unchecked. It is recommended to equalize the battery periodically.
6.1 How to Apply Equalization Function
Enable the battery equalization function in monitoring LCD setting program 33. Then, apply this function by either:
- Setting the equalization interval in program 37.
- Activating equalization immediately in program 39.
6.2 When to Equalize
In float stage, when the setting equalization interval is reached, or equalization is actively initiated, the controller will enter the Equalize stage.
6.3 Equalize Charging Time and Timeout
In the Equalize stage, the controller charges the battery until its voltage reaches the battery equalization voltage. Constant-voltage regulation then maintains this voltage. The battery remains in the Equalize stage until the set equalized time is reached. If the battery voltage does not rise to the equalization voltage point within the set time, the charge controller will extend the time until it does. If the voltage is still low after the extended timeout, the controller will stop equalization and return to the float stage.
7. Setting for Lithium Battery
If using a lithium battery with the inverter, ensure it is a compatible model. Lithium batteries have two connectors: an RS485 port for the BMS and a power cable.
7.1 Lithium Battery Connection
- Assemble battery terminals based on recommended battery cable and terminal size (similar to lead-acid battery connections).
- Connect the RS485 port of the battery to the BMS (RS485) communication port of the inverter.
7.2 Lithium Battery Communication and Setting
Ensure the BMS communication cable is connected between the battery and the inverter. This cable transmits information and signals, allowing the inverter to:
- Re-configure charging voltage, charging current, and battery discharge cut-off voltage based on lithium battery parameters.
- Start or stop charging according to the lithium battery status.
Make sure the lithium battery RS485 port connects to the inverter with a Pin-to-Pin connection. The communication cable is included in the package.
Inverter RS485 Port Pin Assignment:
| Pin number | RS485 Port |
|---|---|
| PIN1 | RS485-B |
| PIN2 | RS485-A |
| PIN7 | RS485-A |
| PIN8 | RS485-B |
After connecting, you need to finish and confirm some settings:
- Set battery type as 'USE' (user-defined) in LCD program 05.
- Set C.V voltage as Max charging voltage of BMS - 0.5V.
- Set floating charging voltage.
- Set Low DC cut-off voltage ≥ discharging protection voltage of BMS + 2V.
- Set Max charging current (must be less than the Max charging current of BMS).
- Set voltage point back to utility source when selecting 'SBU priority' or 'Solar first' in program 01.
Refer to pages 35-39 of the User Manual PDF for detailed lithium battery settings.
8. Specifications
Detailed specifications for the EASUN POWER 6.2KW Hybrid Solar Inverter are provided in the tables below.
8.1 Table 1 Line Mode Specifications
| INVERTER MODEL | 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 | Line mode: Circuit Breaker Battery mode: Electronic Circuits |
| Efficiency (Line Mode) | >95% (Rated R load, battery full charged) |
| Transfer Time | 10ms typical (UPS); 20ms typical (Appliances) |
| Output power derating: | When AC input voltage drops to 95V or 170V depending on models, the output power will be derated. |
8.2 Table 2 Inverter Mode Specifications
| INVERTER MODEL | 6.2KVA |
|---|---|
| Rated Output Power | 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 | 2* rated power for 5 seconds |
| Nominal DC Input Voltage | 48Vdc |
| Cold Start Voltage | 46.0Vdc |
| Low DC Warning Voltage | @load < 20%: 44.0Vdc @20% ≤ load < 50%: 42.8Vdc @load ≥ 50%: 40.4Vdc |
| Low DC Warning Return Voltage | @load < 20%: 46.0Vdc @20% ≤ load < 50%: 44.8Vdc @load ≥ 50%: 42.4Vdc |
| Low DC Cut-off Voltage | @load < 20%: 42.0Vdc @20% ≤ load < 50%: 40.8Vdc @load ≥ 50%: 38.4Vdc |
8.3 Table 3 Charge Mode Specifications
| Utility Charging Mode | 6.2KVA |
|---|---|
| Max Charging Current (PV+AC) | 120Amp (@ VI/P=230Vac) |
| MaxCharging Current (AC) | 80Amp (@ VI/P=230Vac) |
| Bulk Charging Voltage (Flooded Battery) | 58.4Vdc |
| Bulk Charging Voltage (AGM / Gel Battery) | 56.4Vdc |
| Floating Charging Voltage | 54Vdc |
| Overcharge Protection | 63Vdc |
| Charging Algorithm | 3-Step |
| Solar Input | |
| Rated Power | 6500W |
| Max. PV Array Open Circuit Voltage | 500Vdc |
| PV Array MPPT Voltage Range | 60Vdc~450Vdc |
| Max. Input Current | 27A |
| MaxCharging Current(PV) | 120A |
8.4 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) |
| Net Weight, kg | 12 |
| Ingress Protection rating | IP21 |
9. Troubleshooting
This section provides guidance for common issues. For persistent problems, contact a qualified service person.
9.1 Fault Reference Code
| Fault Code | Fault Event |
|---|---|
| 01 | 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 |
9.2 Warning Indicator
| Warning Code | Warning Event | Audible Alarm |
|---|---|---|
| 02 | Temperature is too High | 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 communication is failed | Beep once every 0.5 second |
| 20 | Battery low and it isn't up to the setting value of program 13 | Beep twice every 3 seconds |
| E9 | Battery equalization | None |
| bP | Battery is not connected | None |
9.3 General Troubleshooting
| Problem | Explanation / Possible cause | What to do |
|---|---|---|
| Unit shuts down automatically during startup process. | The battery voltage is too low. | 1. Re-charge battery. 2. Replace battery. |
| No response after power on. | 1. The battery voltage is far too low. 2. Battery polarity is connected reversed. 3. Input protector is tripped. | 1. Check if batteries and the wiring are connected well. 2. Re-charge battery. 3. Replace battery. 4. Check if AC breaker is tripped and AC wiring is connected well. |
| Mains exist but the unit works in battery mode. | 1. Insufficient quality of AC power (Shore or Generator). 2. Set "Solar First" as the priority of output source. | 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 (UPS→Appliance). 3. Change output source priority to Utility first. |
| When the unit is turned on, internal relay is switched on and off repeatedly. | Battery is disconnected. | Check if battery wires are connected well. |
| Buzzer beeps continuously and red LED is on. | 1. Overload error. The inverter is overloaded 110% and time is up. 2. Output short circuited. 3. Internal temperature of inverter component is over 100°C. 4. Battery is over-charged. 5. The battery voltage is too high. 6. Output abnormal (Inverter voltage below than 190Vac or is higher than 260Vac). 7. Internal components failed. 8. Over current or surge. 9. Bus voltage is too low. 10. Output voltage is unbalanced. | 1. Reduce the connected load by switching off some equipment. 2. Check if wiring is connected well and remove abnormal load. 3. Check whether the air flow of the unit is blocked or whether the ambient temperature is too high. 4. Please contact the seller and provide a video or pictures of the malfunction. 5. Check if spec and quantity of batteries are meet requirements. 6. Restart the unit, if the error happens again, Please contact the seller and provide a video or pictures of the malfunction. |
10. Parallel Installation Guide
This inverter supports parallel operation in two different modes:
- Parallel operation in single phase with up to 12 units.
- Maximum 12 units working together to support three-phase equipment (10 units maximum per phase).
10.1 Package Contents
In the parallel kit, you will find a parallel communication cable.
10.2 Mounting the Unit for Parallel Operation
When installing multiple units, ensure proper air circulation to dissipate heat. Allow a clearance of approximately 20 cm to the sides and 50 cm above and below each unit. Install each unit at the same level.
10.3 Wiring Connection for Parallel Operation
NOTICE: It is required to connect to the battery for parallel operation. Ensure all battery cables are of the same length to prevent voltage differences.
Recommended Battery Cable and Terminal Size for Each Inverter:
| Model | Wire Size | Cable mm² | Torque Value |
|---|---|---|---|
| 6.2KVA | 2AWG | 38 | 2~3 Nm |
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 using a connector or bus-bar. The cable size from the joint to the battery should be X times the cable size for a single unit, where X is the number of inverters in parallel. The same principle applies to AC input and output.
CAUTION: Install breakers at the battery and AC input side. The recommended breaker specification for the battery for each inverter is 100A/60VDC. If using only one breaker for the whole system, its rating should be X times the current of one unit.
10.4 Parallel Operation in Single Phase
Two Inverters in Parallel:
Four Inverters in Parallel:
Six Inverters in Parallel:
10.5 Support 3-Phase Equipment
The inverter can support 3-phase equipment. It is possible to pick up to 10 inverters on any phase, with a maximum of 12 units total (N=N1+N2+N3).
One Inverter in Each Phase:
N1max=N2max=9 units in two phases and one inverter for the one phase (N3=1):
10.6 PV Connection for Parallel Operation
Each inverter should connect to PV modules separately.
10.7 LCD Setting and Display for Parallel Operation
Refer to pages 53-54 of the User Manual PDF for detailed LCD settings specific to parallel operation.
10.8 Commissioning for Parallel Operation
Parallel in Single Phase:
- Step 1: Check for correct wire connections. Ensure all breakers in Line wires of the load side are open and all 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. Then shut down all units. (Note: It's necessary to turn off the switch when setting the LCD program. Otherwise, the setting cannot be programmed.)
- Step 3: Turn on each unit. Master and slave units are randomly defined. If it is a master, the 'P' icon blinks; if it is a slave, the 'P' icon is normally on.
- Step 4: Switch on all AC breakers of Line wires in AC input. It's best to connect all inverters to utility at the same time. If AC connection is detected, they will work normally.
- Step 5: If there is no more fault alarm, the parallel system is completely installed.
- Step 6: Switch on all breakers of Line wires in the load side. The system will start to provide power to the load.
10.9 Troubleshooting for Parallel Operation
Refer to page 55 of the User Manual PDF for troubleshooting specific to parallel installations, including issues like host loss, synchronization loss, incompatible battery type, and firmware version inconsistencies.
11. User Tips
- Always ensure all wiring connections are secure and follow polarity guidelines to prevent damage and ensure safe operation.
- For optimal performance and longevity, regularly check the battery equalization status and perform equalization as needed, especially for lead-acid batteries.
- When connecting to a generator, ensure the generator provides stable power to avoid inverter instability.
- If using lithium batteries, ensure proper communication between the battery's BMS and the inverter for correct charging and discharge management.
12. Frequently Asked Questions
- Q: Is there a warranty for the product?
- A: For warranty information, please refer to the official product documentation or contact the seller directly.
13. Warranty and Support
For detailed warranty terms, conditions, and support information, please refer to the complete User Manual (PDF) provided by the manufacturer. If you encounter any issues not covered in this manual or require technical assistance, please contact EASUN POWER customer support or your local dealer.
