1. Introduction
1.1 Purpose
This manual describes the assembly, installation, operation, and troubleshooting of the EASUN POWER Hybrid Solar Inverter. Please read this manual carefully before installations and operations. Keep this manual for future reference.
1.2 Scope
This manual provides safety and installation guidelines as well as information on tools and wiring for the 3.6KW, 4.2KW, and 6.2KW models of the Hybrid Inverter.
1.3 Features
- Pure sine wave inverter
- 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
- WIFI Included (External WIFI module for monitoring and control via SmartESS App)
- Dual output
Figure 1.1: MPPT Solar Inverter Key Features
1.4 Basic System Architecture
The inverter/charger combines functions of an inverter, solar charger, and battery charger. It can power various appliances in home or office environments, including motor-type appliances like tube lights, fans, refrigerators, and air conditioners.
Figure 1.2: Hybrid Power System Diagram showing connections to solar power, generator, utility grid, battery packs, and home appliances.
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 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 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 battery.
- NEVER charge a frozen battery.
- For optimum operation of this inverter/charger, please follow required specifications to select appropriate cable size. It's 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 installation procedure when you want to disconnect AC or DC terminals. Please refer to the INSTALLATION section of this manual for the details.
- One piece of 150A fuse is 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 circuited. 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 troubleshooting table, please send this inverter/charger back to local dealer or service center for maintenance.
3. Installation and Setup
3.1 Unpacking and Inspection
Before installation, please inspect the unit. Be sure that nothing inside the package is damaged. You should have received the following items:
- The inverter unit x 1
- User manual x 1
- Communication cable (for Wi-Fi/GPRS module)
- Power cable
- Mounting screws
Video 3.1: Unboxing the EASUN POWER Hybrid Solar Inverter, showing the contents of the package.
3.2 Mounting the Unit
Consider the following points before selecting where to install:
- Do not mount the inverter on flammable construction materials.
- Mount on a solid surface.
- Install this inverter at eye level in order to allow the LCD display to be read at all times.
- For proper air circulation to dissipate heat, allow a clearance of approx. 20 cm to the side and approx. 50 cm above and below the unit.
- The ambient temperature should be between 0°C and 55°C to ensure optimal operation.
- The recommended installation position is to be adhered to the wall vertically.
- Make sure that other objects and surfaces are left with enough space from the machine to ensure adequate heat dissipation and that there is enough room to remove the wires.
SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.
Install the unit by screwing two M6 screws.
Figure 3.1: Diagram illustrating recommended clearances for mounting the inverter on a wall.
3.3 Battery Connection
CAUTION: For safety operation and regulation compliance, it's requested to install a separate DC over-current protector or disconnect device between battery and inverter. It may not be requested to have a disconnect device in some applications, however, it's still requested to have over-current protection installed. Please refer to typical amperage in below table as required fuse or breaker size.
WARNING! All wiring must be performed by qualified personnel.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for battery connection. To reduce risk of injury, please use the proper recommended cable as below.
Recommended Battery Cable Size:
| Model | Wire Size | Cable (mm²) | Torque value (max) |
|---|---|---|---|
| 3.6KW/4.2KW/6.2KW | 1 x 2AWG | 25 | 2 Nm |
Battery Connection Steps:
- Remove insulation sleeve 18 mm for positive and negative conductors.
- Suggest to put bootlace ferrules on the end of positive and negative wires with a proper crimping tool.
- Connect all battery packs as shown in the diagram below.
- Insert the battery wires flatly into battery connectors of inverter and make sure the bolts are tightened with a torque of 2 Nm in a clockwise direction. Ensure polarity is correct at both the battery and the inverter/charger, and conductors are tightly screwed into the battery terminals. Recommended tool: #2 Pozi Screwdriver.
Figure 3.2: Battery Connection Diagram for 24VDC (4.2KW model) and 48VDC (6.2KW model) systems.
WARNING: Shock Hazard! Installation must be performed with care due to high battery voltage in series.
CAUTION!! Before making the final DC connection or closing DC breaker/disconnector, be sure positive (+) must be connected to positive (+) and negative (-) must be connected to negative (-).
3.4 AC Input/Output Connection
CAUTION!! Before connecting to AC input power source, please install a separate AC breaker between the inverter and AC input power source. This will ensure the inverter can be securely disconnected during maintenance and fully protected from overcurrent of AC input. The recommended spec of AC breaker is 32A for 3.6KW/4.2KW and 50A for 6.2KW.
CAUTION!! There are two terminal blocks with “IN” and “OUT” markings. Please do NOT mis-connect input and output connectors.
WARNING! All wiring must be performed by qualified personnel.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for AC input connection. To reduce risk of injury, please use the proper recommended cable size as below.
Suggested Cable Requirement for AC Wires:
| Model | Gauge | Cable (mm²) | Torque Value |
|---|---|---|---|
| 3.6KW/4.2KW | 12 AWG | 4 | 1.2 Nm |
| 6.2KW | 10 AWG | 6 | 1.2 Nm |
AC Input/Output Connection Steps:
- Before making AC input/output connection, be sure to open DC protector or disconnector first.
- Remove insulation sleeve 10mm for six conductors. Shorten phase L and neutral conductor N by 3 mm.
- Insert AC input wires according to polarities indicated on the terminal block and tighten the terminal screws.
- L → LINE (brown or black)
- N → Neutral (blue)
WARNING: Be sure that AC power source is disconnected before attempting to hardwire it to the unit.
- Then, insert AC output wires according to polarities indicated on the terminal block and tighten terminal screws.
- L → LINE (brown or black)
- N → Neutral (blue)
- Make sure the wires are securely connected.
CAUTION: Appliances such as air conditioners require at least 2-3 minutes to restart due to the time needed to balance refrigerant gas. If a power shortage occurs and recovers quickly, it can damage connected appliances. To prevent this, check if the air conditioner manufacturer specifies a time-delay function. Otherwise, the inverter/charger may trigger an overload fault and cut off output to protect your appliance, but damage may still occur.
3.5 PV Connection
CAUTION: Before connecting to PV modules, please install separately a DC circuit breaker between the inverter and PV modules.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for PV module connection. To reduce risk of injury, please use the proper recommended cable size as below.
Recommended Cable Size for PV Module Connection:
| Model | Wire Size | Cable (mm²) | Torque Value (max) |
|---|---|---|---|
| 3.6KW/4.2KW/6.2KW | 1 x 12AWG | 4 | 1.2 Nm |
PV Module Selection:
When selecting proper PV modules, please be sure to consider the below parameters:
- Open circuit Voltage (Voc) of PV modules should 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.
| INVERTER MODEL | 3.6KW/4.2KW | 6.2KW |
|---|---|---|
| Max. PV Array Open Circuit Voltage | 500Vdc | 500Vdc |
| PV Array MPPT Voltage Range | 60-500Vdc | 60-500Vdc |
Figure 3.3: PV Connection Diagram showing solar panels connected to the inverter and a table for PV module selection parameters.
PV Module Configuration Example (250Wp PV module):
| Solar Panel Spec. (reference) | SOLAR INPUT (Min in serial: 6 pcs, max. in serial: 13 pcs) | Q'ty of panels | Total input power |
|---|---|---|---|
| 250Wp, Vmp: 30.1Vdc, Imp: 8.3A, Voc: 37.7Vdc, Isc: 8.4A, Cells: 60 | 6 pcs in serial | 6 pcs | 1500W |
| 8 pcs in serial | 8 pcs | 2000W | |
| 12 pcs in serial | 12 pcs | 3000W | |
| 13 pcs in serial | 13 pcs | 3250W | |
| 8 pieces in serial and 2 sets in parallel | 16 pcs | 4000W | |
| 10 pieces in serial and 2 sets in parallel | 20 pcs | 5000W | |
| 10 pieces in serial and 2 sets in parallel | 20 pcs | 6200W | |
| 12 pieces in serial and 2 sets in parallel | 24 pcs | 6500W | |
| 10 pieces in serial and 3 sets in parallel | 30 pcs | 7500W |
PV Module Wire Connection Steps:
- Remove insulation sleeve 10 mm for positive and negative conductors.
- Suggest to put bootlace ferrules on the end of positive and negative wires with a proper crimping tool.
- Check correct polarity of wire connection from PV modules and PV input connectors. Then, connect positive pole (+) of connection wire to positive pole (+) of PV input connector. Connect negative pole (-) of connection wire to negative pole (-) of PV input connector. Recommended tool: 4mm blade screwdriver.
3.6 Final Assembly
After connecting all wirings, please put the bottom cover back by screwing two screws.
3.7 Communication Connection
The inverter supports Wi-Fi and GPRS cloud communication for monitoring and control via the SmartESS App (available for iOS and Android) or a webpage.
- **Wi-Fi Cloud Communication (Option):** Use the supplied communication cable to connect to the inverter and the Wi-Fi module. Download the SmartESS App and refer to the "Wi-Fi Plug Quick Installation Guideline" to set up the network and register. The inverter status will be shown by the mobile phone App or computer webpage.
- **GPRS Cloud Communication (Option):** Use the supplied communication cable to connect to the inverter and the GPRS module, and then apply external power to the GPRS module. Download the SmartESS App and refer to the "GPRS RTU Quick Installation Guideline" to set up the network and register. The inverter status will be shown by the mobile phone App or computer webpage.
- **Battery Communication:** The communication between the battery and the inverter can be realized through the battery communication interface, allowing the inverter and the lithium battery to exchange information at a Baud rate of 9600.
Figure 3.4: Diagram showing the inverter connected to a Wi-Fi module for monitoring via the SmartESS App.
Lithium Battery and Inverter Connection:
Use power cables and communication cables for lithium batteries and inverters to connect. Ensure correct polarity for lithium battery and inverter positive and negative positions. The RJ45 connector of the communication cable connects to the BMS port of the inverter, and the other RJ45 connector connects to the RS485 port of the lithium battery. Before connecting, ensure the lithium battery and inverter are turned off. It is recommended to install a circuit breaker for the power cables of the lithium battery and the inverter battery interface to prevent sparks.
Lithium Battery Communication Cable Interface:
| CONNECTION METHOD | A-01 | A-02 |
|---|---|---|
| 1 | 7 | |
| 2 | 8 | |
| 8 | 6 | |
| EMPTY PIN IS NOT CONNECTED |
Figure 3.5: Inverter connection ports (BMS, WIFI, RS485, RS232) and an internal view of the inverter.
4. Operation
4.1 Power ON/OFF
Once the unit has been properly installed and the batteries are connected, simply press the On/Off switch (located on the bottom of the case) to turn on the unit.
Figure 4.1: Bottom view of the inverter showing the Power On/Off switch and various communication ports.
4.2 Operation and Display Panel
The operation and display panel, located on the front of the inverter, includes three indicators, four function keys, and an LCD display, showing operating status and input/output power information.
Figure 4.2: Product Overview showing the LCD Display, Function Keys (ESC, UP, DOWN, ENTER), and LED Indicators (AC/INV, CHG, FAULT).
LED Indicator Messages:
| LED Indicator | 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 |
4.3 LCD Display Icons
The LCD display provides various icons to indicate the inverter's status and operation mode.
| Icon | Function description |
|---|---|
| AC Input Icon | Indicates the AC input. |
| PV Input Icon | Indicates the PV input. |
| 8.8.8 KW V Hz A | Indicate input voltage, input frequency, PV voltage, charger current (if PV in charging for 3.6KW models), charger power, battery voltage. |
| Setting Programs Icon | Indicates the setting programs. |
| Warning/Fault Codes Icon | Indicates the warning and fault codes. |
| Output Information Icon | Indicate output voltage, output frequency, load percent, load in VA, load in Watt and discharging current. |
| Battery Information Icon | Battery Information |
| Overload Icon | Indicates overload. |
| Mains Connection Icon | Indicates unit connects to the mains. |
| PV Panel Connection Icon | Indicates unit connects to the PV panel. |
| AC BYPASS Icon | Indicates load is supplied by utility power. |
| Utility Charger Circuit Icon | Indicates the utility charger circuit is working. |
| DC/AC Inverter Circuit Icon | Indicates the DC/AC inverter circuit is working. |
| Mute Icon | Indicates unit alarm is disabled. |
4.4 LCD Setting
After pressing and holding the ENTER button for 3 seconds, the unit will enter setting mode. Use the “UP” or “DOWN” button to select setting programs, then press “ENTER” to confirm or ESC to exit.
Key Settings:
- Program 01: Output Source Priority
- Utility first (U56): Utility provides power as first priority. Solar and battery energy provide power only when utility is unavailable.
- Solar first (S06 - default): Solar energy provides power as first priority. If solar energy is insufficient, utility supplies power simultaneously. Battery provides power only when solar and utility are unavailable or insufficient.
- SBU priority (SBU): Solar energy provides power as first priority. If solar energy is insufficient, battery energy supplies power. Utility provides power only when battery voltage drops to a low-level warning or setting point (Program 12).
- MKS priority (MKS): Solar energy provides power as first priority. If solar energy is insufficient, utility supplies power simultaneously. Battery only supplies energy as backup power.
- Program 05: Battery Type
Set to "USE" for user-defined battery parameters, or "LIB-485" for lithium batteries with BMS communication. If "LIB-485" is selected, the inverter will communicate with the lithium battery BMS. - Program 12: Battery SOC point for switching to utility source (SBU mode)
Default: 50%. Range: 10% - 50%. - Program 13: Battery SOC point for switching to battery mode (SBU mode)
Default: 95%. Range: 30% - 100%. - Program 29: Battery low SOC shutdown point (LIB-485 mode)
Default: 20%. Range: 5% - 30%.
In "LIB-485" mode, press and hold the "ESC" button to view lithium battery information. The display will show total battery voltage and remaining battery capacity. Press "DOWN" to cycle through other data.
4.5 Operating Mode Description
The inverter operates in various modes depending on power availability and settings.
| Operation mode | Description | LCD display example |
|---|---|---|
| Standby Mode | The inverter is not turned on, but can still charge batteries without AC output. | PV and mains charging:  |
| Line Mode | The unit provides output power from the mains and charges the battery. | Grid-connected mode: |
| Grid-Tie Operation | When working in Grid-Tie mode, the inverter will flash 3 times every 3 seconds. | Grid-connected mode: |
| Battery Mode | The unit provides output power from battery and power. | Battery and Solar supply power to loads at the same time: |
4.6 Battery Equalization
Battery Equalization Description:
Equalization function is added to the charge controller. It reverses the buildup of negative chemical effects like stratification (acid concentration greater at the bottom of the battery) and helps remove sulfate crystals that might have built up on the plates. This condition, called sulfation, reduces the overall capacity of the battery. Therefore, it's recommended to equalize the battery periodically.
How to Apply Equalization Function:
You must enable the battery equalization function in monitoring LCD setting program 30 first. Then, you may apply this function in the device by either one of the following methods:
- Setting equalization interval in program 35.
- Active equalization immediately in program 36.
When to Equalize:
In the float stage, when the setting equalization interval (battery equalization cycle) is reached, or equalization is active immediately, the controller will start to enter the Equalize stage.
Equalize Charging Time and Timeout:
In the Equalize stage, the controller will supply power to charge the battery as much as possible until the battery voltage raises to the battery equalization voltage. Then, constant-voltage regulation is applied to maintain the battery voltage at the battery equalization voltage. The battery will remain in the Equalize stage until the setting battery equalized time is reached.
However, if the battery equalized time expires and the battery voltage doesn't rise to the battery equalization voltage point, the charge controller will extend the battery equalized time until the battery voltage achieves the battery equalization voltage. If the battery voltage is still lower than the battery equalization voltage when the battery equalized timeout setting is over, the charge controller will stop equalization and return to the float stage.
4.7 Mains and Lithium Battery Activation Function
- After 90 seconds of mains power connection to the inverter, the machine connects to the mains and starts to work.
- If the inverter is in lithium battery mode (item 05 is Llb or LIb-485), and the mains are connected but the battery is not, the mains activation function is automatically enabled.
5. Maintenance
5.1 Clearance and Maintenance for Anti-Dust Kit
Every inverter is already installed with an anti-dust kit from the factory. The inverter will automatically detect this kit and activate an internal thermal sensor to adjust the internal temperature. This kit also keeps dust out of your inverter and increases product reliability in harsh environments.
Steps for Cleaning the Anti-Dust Kit:
- Please loosen the screw in a counterclockwise direction on the top of the inverter.
- Then, the dustproof case can be removed, and the air filter foam can be taken out.
- Clean the air filter foam and dustproof case. After cleaning, re-assemble the dust-kit back to the inverter.
NOTICE: The anti-dust kit should be cleaned from dust every one month.
6. Troubleshooting
This section provides guidance for common issues, fault codes, and warning indicators.
6.1 Fault Reference Code
| Fault Code | Fault Event | Icon on |
|---|---|---|
| 01 | Fan is locked when inverter is off. | 01 ERROR |
| 02 | Over temperature | 02 ERROR |
| 03 | Battery voltage is too high | 03 ERROR |
| 04 | Battery voltage is too low | 04 ERROR |
| 05 | Output short circuited or over temperature is detected by internal converter components. | 05 ERROR |
| 06 | Output voltage is too high. | 06 ERROR |
| 07 | Overload time out | 07 ERROR |
| 08 | Bus voltage is too high | 08 ERROR |
| 09 | Bus soft start failed | 09 ERROR |
| 51 | Over current or surge | 51 ERROR |
| 52 | Bus voltage is too low | 52 ERROR |
| 53 | Inverter soft start failed | 53 ERROR |
| 55 | Over DC voltage in AC output | 55 ERROR |
| 57 | Current sensor failed | 57 ERROR |
| 58 | Output voltage is too low | 58 ERROR |
| 59 | PV voltage is over limitation | 59 ERROR |
6.2 Warning Indicator
| Warning Code | Warning Event | Audible Alarm | Icon flashing |
|---|---|---|---|
| 01 | Fan is locked when inverter is on. | Beep three times every second | 01 |
| 03 | Battery is over-charged | Beep once every second | 03 |
| 04 | Low battery | Beep once every second | 04 |
| 07 | Overload | Beep once every 0.5 second | 07 |
| 10 | Output power derating | Beep twice every 3 seconds | 10 |
| 15 | PV energy is low. | Beep twice every 3 seconds | 15 |
| E9 | Battery equalization | None | E9 |
| 6P | Battery is not connected | None | 6P |
6.3 General Troubleshooting Steps
| Problem | LCD/LED/Buzzer | Explanation / Possible cause | What to do |
|---|---|---|---|
| Unit shuts down automatically during startup process. | LCD/LEDs and buzzer active for 3 seconds then off. | Battery voltage is too low (<1.91V/Cell) | 1. Re-charge battery. 2. Replace battery. |
| No response after power on. | No indication. | 1. Battery voltage is far too low (<1.4V/Cell) 2. Internal fuse tripped. | 1. Contact repair center for replacing the fuse. 2. Re-charge battery. 3. Replace battery. |
| Input voltage displayed as 0 on LCD, 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 (UPS/Appliance). |
| Green LED is flashing. | Set "Solar First" as priority of output source. | Change output source priority to Utility first. | |
| When unit turned on, internal relay switched on and off repeatedly. | LCD display and LEDs are flashing | Battery is disconnected. | Check if battery wires are connected well. |
| Fault code 07 | Overload error. Inverter is overload 110% and time is up. | Reduce connected load by switching off some equipment. | |
| Fault code 05 | Output short circuited. | Check if wiring is connected well and remove abnormal load. | |
| Temperature of internal converter component is over 120°C. Internal temperature of inverter component is over 100°C. | Check whether air flow of unit is blocked or ambient temperature is too high. | ||
| Fault code 02 | Battery is over-charged. | Return to repair center. | |
| Buzzer beeps continuously and red LED is on. | Fault code 03 | The battery voltage is too high. | Check if spec and quantity of batteries meet requirements. |
| Fault code 01 | Fan fault | Replace the fan. | |
| Fault code 06/58 | Output abnormal (Inverter voltage below 190Vac or higher than 260Vac) | 1. Reduce the connected load. 2. Return to repair center. | |
| Fault code 08/09/53/57 | Internal components failed. | Return to repair center. | |
| Fault code 51 | Over current or surge. | Restart the unit, if error happens again, please return to repair center. | |
| Fault code 52 | Bus voltage is too low. | ||
| Fault code 55 | Output voltage is unbalanced. |
7. Specifications
7.1 Line Mode Specifications
| INVERTER MODEL | 3.6KW / 4.2KW / 6.2KW | ||
|---|---|---|---|
| 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 | Circuit Breaker | ||
| 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 | 3.6KW | 4.2KW | 6.2KW |
|---|---|---|---|
| Rated Output Power | 3.6KW | 4.2KW | 6.2KW |
| Output Voltage Waveform | Pure Sine Wave | ||
| Output Voltage Regulation | 230Vac±5% | ||
| Output Frequency | 50Hz | ||
| Peak Efficiency | 93% | ||
| Overload Protection | 3s@≥150% load; 5s@101%~150% load | ||
| Surge Capacity | 2* rated power for 5 seconds | ||
| Nominal DC Input Voltage | 24Vdc | 48Vdc | |
| Cold Start Voltage | 23.0Vdc | 46.0Vdc | |
| Low DC Warning Voltage @load < 50% | 22.0Vdc | 44.0Vdc | |
| Low DC Warning Voltage @load ≥ 50% | 21.0Vdc | 42.0Vdc | |
| Low DC Warning Return Voltage @load < 50% | 22.5Vdc | 45.0Vdc | |
| Low DC Warning Return Voltage @load ≥ 50% | 22.0Vdc | 44.0Vdc | |
| Low DC Cut-off Voltage @load < 50% | 20.5Vdc | 41.0Vdc | |
| Low DC Cut-off Voltage @load ≥ 50% | 20.0Vdc | 40.0Vdc | |
| High DC Recovery Voltage | 32Vdc | 62Vdc | |
| High DC Cut-off Voltage | 33Vdc | 63Vdc | |
| No Load Power Consumption | 30W | 35W | 50W |
7.3 Two Load Output Power
| INVERTER MODEL | 3.6KW | 4.2KW | 6.2KW |
|---|---|---|---|
| Full Load | 3600W | 4200W | 6200W |
| Maximum Main Load | 3600W | 4200W | 6200W |
| Second Load Range | 720W~2520W | 840W~2940W | 1240W~4340W |
| Main Load Cut Off Voltage | 22VDC | 44VDC | |
| Main Load Return Voltage | 26VDC | 52VDC | |
7.4 Charge Mode Specifications
Utility Charging Mode:
| INVERTER MODEL | 3.6KW | 4.2KW | 6.2KW |
|---|---|---|---|
| Charging Algorithm | 3-Step | ||
| AC Charging Current (Max) | 100Amp (@VI/P=230Vac) | ||
| Bulk Charging Voltage (Flooded Battery) | 29.2 | 29.2 | 58.4 |
| Bulk Charging Voltage (AGM / Gel Battery) | 28.2 | 28.2 | 56.4 |
| Floating Charging Voltage | 27Vdc | 54Vdc | |
MPPT Solar Charging Mode:
| INVERTER MODEL | 3.6KW | 4.2KW | 6.2KW |
|---|---|---|---|
| Max. PV Array Power | 6200W | 6200W | 6500W |
| Nominal PV Voltage | 240Vdc | 360Vdc | |
| PV Array MPPT Voltage Range | 60Vdc~500Vdc | ||
| Max. PV Array Open Circuit Voltage | 500Vdc | ||
| Max Charging Current (AC charger plus solar charger) | 120Amp | 120Amp | 120Amp |
7.5 Grid-Tie Operation
| INVERTER MODEL | 3.6KW | 4.2KW | 6.2KW |
|---|---|---|---|
| Nominal Output Voltage | 220/230/240 VAC | ||
| Feed-in Grid Voltage Range | 195~253VAC | ||
| Feed-in Grid Frequency Range | 50±1Hz/60±1Hz | ||
| Nominal Output Current | 15.7A | 18.2A | 26.9A |
| Power Factor Range | >0.99 | ||
| Maximum Conversion Efficiency (DC/AC) | 97% | ||
7.6 General Specifications
| INVERTER MODEL | 3.6KW | 4.2KW | 6.2KW |
|---|---|---|---|
| Safety Certification | CE | ||
| Operating Temperature Range | -10°C to 50°C | ||
| Storage temperature | -15°C~60°C | ||
| Humidity | 5% to 95% Relative Humidity (Non-condensing) | ||
| Dimension (D*W*H), mm | 358×442×116 | ||
| Net Weight, kg | 8.0 | 8.0 | 8.9 |
7.7 Approximate Back-up Time Table
24Vdc System (3.6KW/4.2KW models):
| Model | Load (W) | Backup Time @ 24Vdc 100Ah (min) | Backup Time @ 24Vdc 200Ah (min) |
|---|---|---|---|
| 3.6KW/4.2KW | 300 | 449 | 1100 |
| 600 | 222 | 525 | |
| 900 | 124 | 303 | |
| 1200 | 95 | 227 | |
| 1500 | 68 | 164 | |
| 1800 | 56 | 126 | |
| 2100 | 48 | 108 | |
| 2400 | 35 | 94 | |
| 2700 | 31 | 74 | |
| 3200 | 28 | 67 | |
| 3600 | 25 | 60 | |
| 4200 | 22 | 53 |
48Vdc System (6.2KW model):
| Model | Load (W) | Backup Time @ 48Vdc 100Ah (min) | Backup Time @ 48Vdc 200Ah (min) |
|---|---|---|---|
| 6.2KW | 500 | 613 | 1288 |
| 1000 | 268 | 613 | |
| 1500 | 158 | 402 | |
| 2000 | 111 | 271 | |
| 2500 | 90 | 215 | |
| 3200 | 76 | 182 | |
| 3500 | 65 | 141 | |
| 4000 | 50 | 112 | |
| 4500 | 44 | 100 | |
| 5000 | 40 | 90 | |
| 6200 | 36 | 80 |
Note: 1. Backup time depends on the quality of the battery, age of battery, and type of battery. Specifications of batteries may vary depending on different manufacturers. 2. The final interpretation right of this product belongs to the company.
8. User Tips
- Power Source Prioritization: The inverter offers configurable power source priority (Utility first, Solar first, SBU priority, MKS priority). If you want to maximize solar energy usage and only draw from the grid when absolutely necessary, consider setting the 'Output Source Priority' (Program 01) to 'Solar first' or 'SBU priority'. This allows the inverter to intelligently manage power from solar panels, batteries, and the utility grid based on your preferences and battery charge levels.
- Lithium Battery Compatibility: When using lithium batteries, ensure you set the battery type (Program 05) to 'LIB-485' to enable proper BMS communication and access specific lithium battery settings like low SOC shutdown points (Program 29).
- Regular Maintenance: To ensure optimal performance and longevity, regularly clean the anti-dust kit (monthly) and ensure adequate ventilation around the inverter.
9. Warranty and Support
For detailed warranty information, technical support, or service requests, please refer to the official product documentation or contact your local dealer/service center. A comprehensive user manual in PDF format is available for download:
