1. Introduction
This manual describes the assembly, installation, operation, and troubleshooting for this device. Please read this manual carefully before installation and commissioning. Keep this manual for future reference.
This is a multi-function inverter/charger, combining the functions of an inverter, an MPPT solar charger, and a battery charger to offer uninterruptible power support in a portable size. Its comprehensive LCD display provides user-configurable and easily accessible button operations such as battery charging current, AC/solar charger priority, and acceptable input voltage for various applications.
Features:
- Pure sine wave inverter
- Programmable supply priority for PV, battery, or grid
- High PV input voltage range (55~450VDC)
- Built-in MPPT solar charger with maximum 110A
- Compatible with Lithium-ion batteries
- Supports BMS communication with Lithium batteries
- Overload, high temperature, and short circuit protection for the inverter output
- Cold start function
- Intelligent fan speed adjustment
- Optional WiFi module
Basic System Architecture:
The following diagram illustrates the basic application of this inverter/charger. It also includes the following devices to operate a complete system:
- Generator or utility power
- PV modules (optional)
Consult your system integrator for other possible system architectures based on your requirements. This inverter can power all types of devices at home or in the office, including motor-driven devices such as fluorescent lamps, fans, refrigerators, and air conditioners.
2. Safety Instructions
WARNING: This chapter contains important safety and operating instructions. Please read this manual and keep it for future reference.
- Read all instructions and warning labels on the unit, batteries, and all appropriate sections of this manual before using the unit.
- CAUTION – To reduce the risk of injury, charge only deep-cycle lead-acid batteries. Other battery types may burst, causing injury and damage.
- Do not disassemble the unit. Take it to a qualified service center when maintenance or repair is required. Improper reassembly may result in electric shock or fire.
- To reduce the risk of electric shock, disconnect all cables before performing any maintenance or cleaning. Turning off the unit does not reduce this risk.
- CAUTION – Only qualified personnel may install this unit with a battery.
- NEVER charge a frozen battery.
- For optimal operation of this inverter/charger, please observe the required specifications for selecting the appropriate cable size. It is very important to operate this inverter/charger correctly.
- Be very careful when working with metal tools on or near batteries. There is a risk that a dropped tool may cause sparks or a short circuit in batteries or other electrical parts, which can lead to an explosion.
- Please strictly adhere to the installation procedure if you want to disconnect the AC or DC connections. Details can be found in the INSTALLATION section of this manual.
- GROUNDING INSTRUCTIONS – This inverter/charger should be connected to a permanently grounded wiring system. Ensure compliance with local requirements and regulations when installing this inverter.
- NEVER short-circuit the AC output and DC input. DO NOT connect the unit to the grid if the DC input is short-circuited.
- WARNING!!! This unit may only be serviced by qualified personnel. If errors persist even after consulting the troubleshooting table, send the inverter/charger to the local dealer or service center for maintenance.
3. Package Contents
The package should contain the following items:
- 1x Hybrid Solar Inverter
- 1x User Manual
- 1x Connecting line
- 1x WIFI module (if ordered)
4. Setup and Installation
4.1 Unpacking and Inspection
Before installation, please check the unit. Ensure that nothing in the packaging is damaged.
4.2 Preparation
Before connecting all wirings, please remove the bottom cover by unscrewing two screws as shown below.
4.3 Mounting the Unit
Observe the following points before choosing the installation location:
- Do not mount the inverter on flammable materials.
- Mount on a solid surface.
- Install the inverter at eye level to view the LCD display.
- The ambient temperature should be between 0°C and 55°C.
- It is recommended to mount the unit vertically on the wall.
- Ensure that other objects and surfaces, as shown in the diagram, allow for sufficient heat dissipation and enough space for cable removal.
SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACES.
4.4 Battery Connection
ATTENTION: For operational safety and compliance with regulations, it is necessary to install a separate DC overcurrent protection or a disconnect device between the battery and the inverter. For some applications, a disconnect device is not required, but overcurrent protection should still be installed. Please refer to the typical amperage in the table below for the required fuse or breaker size.
WARNING! All wiring must be performed by qualified personnel.
WARNING! For system safety and efficient operation, it is very important to use an appropriate cable for the battery connection. To reduce the risk of injury, please use the correct recommended cable and terminal size (see below).
| Model | Wire Size Cable (mm²) | Ring Terminal D (mm) | Ring Terminal L (mm) | Torque Value |
|---|---|---|---|---|
| 3.8KW 24V / 6.2KW 48V | 1*2AWG (22) | 6.4 | 33.2 | 2 Nm |
| 3.8KW 48V | 1*4AWG (22) | 6.4 | 33.2 | 2 Nm |
Please follow these steps to connect the battery:
- Mount the battery ring terminal according to the recommended battery cable and terminal size.
- Connect all battery packs as required by the units.
WARNING: Shock hazard. Installation must be carried out carefully due to high battery voltage in series.
ATTENTION!! Do not place any objects between the flat part of the inverter terminal and the ring terminal. Otherwise, overheating may occur.
CAUTION!! Do not apply anti-oxidation compound to the terminals before the terminals are firmly connected.
CAUTION!!! Before making the final DC connection or closing the DC circuit breaker/disconnect switch, ensure that Plus (+) is connected to Plus (+) and Minus (-) to Minus (-).
4.5 AC Input/Output Connection
CAUTION!! Before connecting the inverter to the AC input power source, please install a separate AC circuit breaker between the inverter and the AC input power source. This ensures that the inverter can be safely disconnected for maintenance and is fully protected against overcurrent at the AC input. The recommended specification for the AC breaker is 32A for 3.8KW and 50A for 6.2KW.
CAUTION!! There are two terminal blocks labeled "IN" and "OUT". Do NOT incorrectly insert the input and output connections.
WARNING! All wiring must be performed by qualified personnel.
WARNING! For system safety and efficient operation, it is very important to use an appropriate cable for the AC input connection. To reduce the risk of injury, please use the recommended cable size specified below.
| Model | Gauge | Torque Value |
|---|---|---|
| 3.8KW | 12 AWG | 1.2~1.6 Nm |
| 6.2KW | 8 AWG | 1.4~1.6Nm |
Please follow these steps to make an AC input/output connection:
- Before making the AC input/output connection, you must first open the DC protection or disconnect switch.
- Remove 10mm of insulation sleeve for six conductors. Shorten phase L and neutral N by 3mm.
- Insert the AC input wires according to the polarity indicated on the terminal block and tighten the terminal screws, with the protective earth (PE) conductor connected first.
- Ground (yellow-green)
- L → LINE (brown or black)
- N → Neutral (blue)
WARNING: Make sure the AC power source is disconnected before attempting to connect it to the unit.
- Then insert the AC output wires according to the polarity indicated on the terminal block and tighten the terminal screws. Make sure to connect the protective earth (PE) conductor first.
- L → Line (brown or black)
- N → Neutral (blue)
- Ensure that the cables are securely connected.
ATTENTION: Important! Ensure that the AC lines are connected with the correct polarity. If the L and N wires are connected in reverse, this can cause a short circuit when these inverters operate in parallel.
ATTENTION: Devices such as air conditioners require at least 2-3 minutes to restart, as sufficient time is needed for the refrigerant gas to equalize in the circuits. If a power outage occurs and is restored quickly, this can damage connected devices. To avoid such damage, please check before installation whether the air conditioner is equipped with a time delay function. Otherwise, the inverter/charger will trigger an overload fault and interrupt the power supply to protect your device, but this may still cause damage to the air conditioner.
4.6 PV Connection
CAUTION: Before connecting to the PV modules, a separate DC circuit breaker must be installed between the inverter and the PV modules.
WARNING! All wiring must be performed by qualified personnel.
WARNING! For system safety and efficient operation, it is very important to use an appropriate cable for connecting the PV modules. To reduce the risk of injury, please use the recommended cable size specified below.
| Model | Wire Size | Cable (mm²) | Torque Value (max) |
|---|---|---|---|
| 3.8KW/6.2KW | 1x12AWG | 4 | 1.2 Nm |
Please follow these steps to implement PV module connection:
- Remove 10mm of insulation sleeve for positive and negative conductors.
- Check the correct polarity of the connection cable from PV modules and PV input connectors. Then connect the positive (+) pole of the connection cable to the positive (+) pole of the PV input connector. Connect the negative (-) pole of the connection cable to the negative (-) pole of the PV input connector.
- Make sure the wires are securely connected.
4.7 Final Assembly
After connecting all cables, please replace the bottom cover by screwing in two screws as shown below.
5. Operation
5.1 Power ON/OFF
Once the unit is properly installed and the batteries are well connected, simply press the On/Off switch (located on the side of the housing) to turn on the unit.
5.2 Operation and Display Panel
The operation and display panel, shown in the following table, is located on the front of the inverter. It contains three indicators, four function buttons, and an LCD display that shows the operating status and input/output power information.
LED Indicators:
| Indicator | Color | Message |
|---|---|---|
| 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: Inverter fault. Flashing: Warning condition occurs in the inverter. |
Function Buttons:
| Function Button | Description |
|---|---|
| ESC | To exit setting mode. |
| UP | To go to the previous selection. |
| DOWN | To go to the next selection. |
| ENTER | To confirm the selection in setting mode or enter setting mode. |
5.3 LCD Display Icons
The LCD display shows various information about the inverter's status and operation.
Input Source Information:
- Shows AC input.
- Shows PV input.
- Displays input voltage, input frequency, PV voltage, battery voltage, and charging current.
Configuration Program and Error Information:
- Shows setting programs.
- Shows warning and error codes.
- Warning: Flashes with warning code.
- Error: Lights up with error code.
Output Information:
- Displays output voltage, output frequency, load in percent, load in VA, load in Watt, and discharge current.
Battery Information:
- When this function is disabled, the on/off status of the inverter output is not affected, regardless of whether the connected load is low or high.
- The inverter's power is not affected.
- In AC mode, the battery charge status is displayed.
Charging Information:
- OVERLOAD: Indicates overload.
- Shows load level at 0-24%, 25-50%, 50-74%, and 75-100%.
Operating Information:
- Indicates that the unit is connected to the grid.
- Indicates that the unit is connected to the PV panel.
- BYPASS: Indicates that the load is supplied by utility power.
- Indicates that the grid charger circuit is functioning.
- Indicates that the DC/AC inverter circuit is functioning.
Mute:
- Indicates that the alarm is deactivated.
5.4 LCD Setting
After pressing and holding the ENTER button for three seconds, the unit enters setting mode. Press the "UP" or "DOWN" button to select setting programs. Then press ENTER to confirm the selection, or ESC to exit.
Setting Programs:
The manual provides a detailed list of configurable parameters, including:
- Program 00: Exit setting mode.
- Program 01: Output source priority (Solar first, Utility first, SBU priority).
- Program 02: Maximum charging current.
- Program 03: AC input voltage range.
- Program 04: Power saving mode enable/disable.
- Program 05: Battery type (Flooded, AGM, User-defined).
- ... and many more settings for output voltage, frequency, alarm control, auto restart, battery equalization, etc. Refer to the full PDF manual for a complete list and detailed descriptions of each setting.
5.5 Operating Mode Description
Standby Mode / Power Saving Mode:
- Standby Mode: The inverter is not yet switched on, but can charge the battery without AC output.
- Power Saving Mode: When activated, the inverter output is switched off if the connected load is very low or not detected.
Line Mode:
- The unit supplies output power from the grid. It also charges the battery in grid mode.
- If "SBU Priority" is selected and solar power is insufficient to supply the load, solar power and utility supply the load and charge the battery simultaneously.
Battery Mode:
- The unit supplies output power from the battery and PV.
- PV energy supplies power to consumers and charges the battery simultaneously.
5.6 Battery Equalization Function
The equalization function is integrated into the charge controller. It reverses the build-up of negative chemical effects such as stratification, where the acid concentration at the bottom of the battery is higher than at the top. The equalization function also helps remove sulfate crystals that may have formed on the plates. If this condition, known as sulfation, remains uncontrolled, the overall capacity of the battery will be reduced. Therefore, it is recommended to equalize the battery regularly.
How to apply the equalization function:
You must first activate the battery equalization function in LCD setting program 33. Then you can apply this function in the unit using one of the following methods:
- Setting the equalization interval in program 34.
- Immediate activation of the equalization function in program 39.
When is equalization performed?
In the float phase, when the set equalization interval (battery equalization cycle) is reached or equalization is immediately active, the controller starts the equalization stage.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your DATOUBOSS inverter. While specific maintenance steps are detailed in the full user manual, general recommendations include:
- Keep the inverter clean and free from dust and debris, especially around ventilation openings.
- Ensure proper ventilation and ambient temperature to prevent overheating.
- Periodically check all cable connections for tightness and signs of wear or corrosion.
- Monitor the LCD display for any warning or fault codes and address them promptly.
- Perform battery equalization as recommended in the manual to maintain battery health.
7. Troubleshooting
This section provides solutions to common issues. If the problem persists after following these steps, please contact qualified service personnel.
| Problem | LCD/LED/Buzzer Indication | Explanation / Possible Cause | What to Do |
|---|---|---|---|
| Unit switches off automatically during startup. | LCD/LEDs and buzzer active for 3 seconds, then completely off. | Battery voltage too low (<1.91V/cell). | 1. Recharge the battery. 2. Replace the battery. |
| No reaction after power on. | No indication. | 1. Battery voltage too low (<1.4V/cell). 2. Battery connected with reverse polarity. | 1. Check if batteries and wiring are correctly connected. 2. Recharge the battery. 3. Replace the battery. |
| Mains voltage present, but unit operates in battery mode. | Input voltage 0 on LCD, green LED flashes. | Input protection triggered. | Check if AC breaker tripped and AC wiring is correctly connected. |
| Mains voltage present, but unit operates in battery mode. | Green LED flashes. | Insufficient quality of AC power supply (utility or generator). | 1. Check if AC cables are too thin or too long. 2. Check if generator (if present) works well or if input voltage range is correct (UPS mode). |
| Mains voltage present, but unit operates in battery mode. | Green LED flashes. | Set "Solar First" as priority for output source. | Change output source priority to "Utility first". |
| Buzzer beeps continuously and red LED lights up. | LCD display and LEDs flash. | Battery disconnected. | Check if battery cables are correctly connected. |
| Buzzer beeps continuously and red LED lights up. | Fault Code 07. | Overload fault. Inverter overloaded by 110% and time expired. | Reduce connected load by switching off some devices. |
| Buzzer beeps continuously and red LED lights up. | Fault Code 05. | Output short-circuited. | Check if wiring is correctly connected and remove abnormal loads. |
| Buzzer beeps continuously and red LED lights up. | Fault Code 02. | Internal converter component temperature above 120°C. | Check if unit airflow is blocked or if ambient temperature is too high. |
| Buzzer beeps continuously and red LED lights up. | Fault Code 03. | Battery is overcharged. | Return to repair center. |
| Buzzer beeps continuously and red LED lights up. | Battery voltage too high. | Battery voltage too high. | Check if battery specifications and quantity meet requirements. |
| Buzzer beeps continuously and red LED lights up. | Fault Code 01. | Fan fault. | Replace the fan. |
| Buzzer beeps continuously and red LED lights up. | Fault Code 06/58. | Abnormal output (inverter voltage less than 190Vac or more than 260Vac). | 1. Reduce connected load. 2. Send to repair center. |
| Buzzer beeps continuously and red LED lights up. | Fault Code 08/09/53/57. | Internal components failed. | Return to repair center. |
| Buzzer beeps continuously and red LED lights up. | Fault Code 51. | Overcurrent or overvoltage. | Restart the unit. If the error occurs again, please send it to the repair center. |
| Buzzer beeps continuously and red LED lights up. | Fault Code 52. | Bus voltage too low. | Restart the unit. If the error occurs again, please send it to the repair center. |
| Buzzer beeps continuously and red LED lights up. | Fault Code 55. | Output voltage unbalanced. | Restart the unit. If the error occurs again, please send it to the repair center. |
| Buzzer beeps continuously and red LED lights up. | Fault Code 56. | Battery not correctly connected or fuse blown. | If the battery is well connected, bring it to the repair center. |
8. Specifications
8.1 Line Mode Specifications
| Parameter | 3.8KW 24V | 3.8KW 48V | 6.2KW 48V |
|---|---|---|---|
| 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 | ||
| Maximum 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 | If AC input voltage drops to 95V or 170V depending on the model, output power is reduced. | ||
8.2 Inverter Mode Specifications
| Parameter | 3.8KW 24V | 3.8KW 48V | 6.2KW 48V |
|---|---|---|---|
| Rated Power | 4.2KVA/3.8KW | 7.0KVA/6.2KW | |
| Output Voltage Waveform | Pure Sine Wave | ||
| Output Voltage Regulation | 230Vac ±5% | ||
| Output Frequency | 60Hz or 50Hz | ||
| Peak Efficiency | 94% | ||
| Overload Protection | 5s@≥150% Load; 10s@110 %~150% Load | ||
| Surge Capacity | 2* Rated Power for five seconds | ||
| Nominal DC Input Voltage | 24Vdc | 48Vdc | |
| Cold Start Voltage | 23.0Vdc | 46.0Vdc | |
| Low DC Warning Voltage (<20% load) | 22.0Vdc | 44.0Vdc | |
| Low DC Warning Voltage (20%-50% load) | 21.4Vdc | 42.8Vdc | |
| Low DC Warning Voltage (>50% load) | 20.2Vdc | 40.4Vdc | |
| Low DC Disconnect Voltage (<20% load) | 21.0Vdc | 42.0Vdc | |
| Low DC Disconnect Voltage (20%-50% load) | 20.4Vdc | 40.8Vdc | |
| Low DC Disconnect Voltage (>50% load) | 19.2Vdc | 38.4Vdc | |
| High DC Recovery Voltage | 23.0Vdc | 46.0Vdc | |
| High DC Disconnect Voltage | 31Vdc | 62Vdc | |
| No Load Current Consumption | <25W | <50W | |
| Power Consumption in Power Saving Mode | <10W | <15W | |
8.3 Utility Charging Mode Specifications
| Parameter | 3.8KW 24V | 3.8KW 48V | 6.2KW 48V |
|---|---|---|---|
| Charging Current (UPS) @ Nominal Input Voltage | 80A | 60A | 80A |
| Bulk Charge Voltage (Flooded Battery) | 29.2V | 58.4V | |
| Bulk Charge Voltage (AGM/Gel Battery) | 28.2V | 56.4V | |
| Float Charge Voltage | 27Vdc | 54Vdc | |
| Charging Algorithm | 3-Step | ||
8.4 Solar Charging Mode Specifications
| Parameter | 3.8KW 24V | 3.8KW 48V | 6.2KW 48V |
|---|---|---|---|
| Rated Power | 6000W | ||
| PV Charging Current | 110A | 80A | 110A |
| Efficiency | 98.0% max. | ||
| Max. PV Array Open Circuit Voltage | 450Vdc | ||
| PV Array MPPT Voltage Range | 55-450Vdc | ||
| Minimum Battery Voltage for PV Charging | 2W | ||
| Power Consumption in Standby Mode | +/-0.3% | ||
| Battery Voltage Accuracy | +/-2V | ||
| PV Voltage Accuracy | 3-Step | ||
| Charging Algorithm | 3-Step | ||
8.5 General Specifications
| Parameter | 3.8KW 24V | 3.8KW 48V | 6.2KW 48V |
|---|---|---|---|
| Safety Certification | CE | ||
| Operating Temperature Range | 0°C to 55°C | ||
| Storage Temperature | -15°C to 60°C | ||
| Dimensions (D*W*H), mm | 423*290*100 (mm) | 423*290*105 (mm) | |
| Net Weight, kg | 6.8KG | 6.9KG | 7.5KG |
9. User Tips
- Remote Monitoring: If your model includes the optional Wi-Fi module, utilize it for convenient real-time monitoring of the hybrid inverter's function status and parameters. This allows you to check your system's performance without distance limitations.
- Power Configuration: Take advantage of the ability to set the priority of mains and photovoltaic power. Adjust these settings according to your actual situation and energy needs to optimize efficiency and cost savings.
- Battery Health: Regularly perform the battery equalization function as described in the manual (Section 5.6) to prevent sulfation and stratification, which can extend the lifespan and maintain the capacity of your batteries.
10. Warranty and Support
For detailed warranty information, service, and support, please refer to the complete user manual PDF available at: DATOUBOSS Inverter User Manual (PDF). This document contains comprehensive details on product guarantees, technical assistance, and contact information for authorized service centers.
Always ensure that any maintenance or repair work is carried out by qualified personnel to maintain product safety and warranty validity.
