1. Product Overview
The ANENJI ANJ-4000W-24V-WIFI is a versatile hybrid solar inverter/charger designed to provide uninterruptible power support. It integrates the functions of an inverter, solar charger, and battery charger into a compact unit. The comprehensive LCD display allows for user-configurable settings and easy operation, including battery charging current, AC/solar charger priority, and acceptable input voltage for various applications.
Key Features:
- Pure sine wave output
- Power factor 1.0
- PV input Voltage range: 60-500Vdc
- Built-in MPPT 100A solar charger
- Lithium Battery Activation support
- Capable of working without a battery
- On-grid and off-grid functionality
- Detachable dust cover for harsh environments
- Optional WiFi remote monitoring
- Supports multiple output priorities: UTL, SOL, SBU, SUB, SUF
- EQ function to optimize battery performance and extend lifecycle
2. Installation
2.1. Unpacking and Inspection
Before installation, carefully inspect the unit. Ensure that no damage occurred during transit. The package should contain:
- The inverter unit x 1
- User manual x 1
2.2. Preparation
Before connecting any wiring, remove the bottom port cover by unscrewing the two retaining screws.
2.3. Mounting the Unit
Consider the following points when selecting an installation location:
- Do not mount the inverter on flammable construction materials.
- Mount on a solid surface.
- Install the inverter at eye level for easy reading of the LCD display.
- The ambient temperature should be between 0°C and 55°C for optimal operation.
- The recommended installation position is vertically on a wall.
- Ensure sufficient clearance from other objects and surfaces for adequate heat dissipation and wiring access.
WARNING: SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.
2.4. Battery Connection
CAUTION: For safety and regulation compliance, install a separate DC over-current protector or disconnect device between the battery and inverter. Refer to the typical amperage table for fuse/breaker sizing.
WARNING: All wiring must be performed by qualified personnel. Use appropriate cable for battery connection to reduce risk of injury.
Recommended battery cable, stripping length (L2), and tinning length (L1):
| Model | Maximum Amperage | Battery capacity | Wire Size | Cable mm² | L1 (mm) | L2 (mm) | Torque Value |
|---|---|---|---|---|---|---|---|
| 4.2KVA | 137A | 100AH | 2AWG | 38 | 3 | 18 | 2~3 Nm |
Steps to implement battery connection:
- Remove 18 mm of insulation from positive and negative cables.
- Connect all battery packs as required.
- Insert battery cables into the inverter's battery connector and tighten bolts to 2-3 Nm. Ensure correct polarity (+ to + and - to -) at both the battery and inverter.
2.5. AC Input/Output Connection
CAUTION: Before connecting to AC input power, install a separate AC breaker (recommended 50A) between the inverter and the AC source. Do not mis-connect input and output connectors. Do not apply anti-oxidant substance on terminals before connecting.
WARNING: All wiring must be performed by qualified personnel. Use appropriate cable for AC input connection.
Suggested cable requirement for AC wires:
| Model | Gauge | Torque Value |
|---|---|---|
| 4.2KVA | 10AWG | 1.4~1.6Nm |
Steps to implement AC input/output connection:
- Before making AC input/output connections, ensure the DC protector or disconnector is open.
- Remove 10mm of insulation sleeve for six conductors. Shorten phase L and neutral conductor N by 3mm.
- Insert AC input wires according to polarities (L, N, PE) indicated on the terminal block and tighten the screws. Connect the PE protective conductor (yellow-green) first.
- Insert AC output wires according to polarities (L, N, PE) indicated on the terminal block and tighten the screws. Connect the PE protective conductor (yellow-green) first.
- Ensure all wires are securely connected.
WARNING: Ensure AC power source is disconnected before hardwiring to the unit.
CAUTION: Appliances like air conditioners require a 2-3 minute restart delay. Check if your air conditioner has a time-delay function before installation to prevent damage.
2.6. PV Connection
CAUTION: Before connecting to PV modules, install a separate DC circuit breaker between the inverter and PV modules.
WARNING: All wiring must be performed by qualified personnel. Use appropriate cable for PV module connection.
Steps to implement PV module connection:
- Remove 10mm of insulation sleeve for positive and negative conductors.
- Check correct polarity of connection cable from PV modules and PV input connectors. Connect positive pole (+) to positive pole (+) and negative pole (-) to negative pole (-).
- Ensure the wires are securely connected.
PV Module Selection: When selecting PV modules, consider the following:
- Open circuit Voltage (Voc) of PV modules must not exceed the max. PV array open circuit voltage of the inverter (500VDC).
- Open circuit Voltage (Voc) of PV modules should be higher than the min. battery voltage.
2.7. Final Assembly
After connecting all wiring, reinstall the bottom port cover by screwing the two retaining screws.
3. Operation
3.1. Power ON/OFF
Once the unit is properly installed and batteries are connected, simply press the ON/OFF switch (located on the bottom of the case) to turn on the unit.
3.2. Operation and Display Panel
The front panel of the inverter features an LCD display, three indicators, and four function keys to show operating status and input/output power information.
LED Indicators:
| LED Indicator | Color | Status | 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 |
3.3. LCD Setting
To enter setting mode, press and hold the ENTER button for 3 seconds. Use the "UP" or "DOWN" buttons to select setting programs, then press "ENTER" to confirm or "ESC" to exit.
The manual provides detailed tables for various LCD settings, including:
- Program 01: Output source priority (Utility first, Solar first, SBU priority, SUB priority, SUF priority)
- Program 02: Maximum charging current (60A default)
- Program 03: AC input voltage range (Appliances, UPS, Generator)
- Program 05: Battery type (AGM, User-Defined, Flooded, Lithium battery without communication, PYLON US2000)
- Program 06: Auto restart when overload occurs
- Program 07: Auto restart when over temperature occurs
- Program 08: Output voltage (220V, 230V, 240V)
- Program 09: Output frequency (50Hz, 60Hz)
- Program 10: Auto bypass (manual, auto)
- Program 11: Maximum utility charging current
- Program 12: Setting voltage point back to utility source (for SBU/Solar first priority)
- Program 13: Setting voltage point back to battery mode (for SBU/Solar first priority)
- Program 16: Charger source priority (Solar first, Solar and Utility, Only Solar)
- Program 18: Buzzer mode (Buzzer mute, various warning sounds)
- Program 19: Auto return to default display screen
- Program 20: Backlight control
- Program 23: Overload bypass
- Program 25: Modbus ID Setting
- Program 26: Bulk charging voltage (C.V voltage)
- Program 27: Floating charging voltage
- Program 29: Low DC cut-off voltage
- Program 32: Bulk charging time (C.V stage)
- Program 33: Battery equalization
- Program 34: Battery equalization voltage
- Program 35: Battery equalized time
- Program 36: Battery equalized timeout
- Program 37: Equalization interval
- Program 39: Equalization activated immediately
- Program 41: Automatic activation for lithium battery
- Program 42: Manual activation for lithium battery
- Program 43: Setting SOC point back to utility source
- Program 44: Setting SOC point back to battery mode
- Program 45: Low DC cut-off SOC
- Program 46: Maximum discharge current protection
3.4. Battery Equalization
The equalization function helps reverse the buildup of negative chemical effects like stratification and removes sulfate crystals, which can reduce battery capacity. It is recommended to equalize batteries periodically.
How to Apply Equalization Function:
- Enable battery equalization in LCD setting program 33.
- Apply by setting equalization interval in program 37 or activating immediately in program 39.
When to Equalize:
In the float stage, when the set equalization interval is reached or equalization is activated immediately, the controller will enter the Equalize stage.
3.5. Setting for Lithium Battery
If using a lithium battery, ensure it is a configured type. The inverter has two connectors for lithium batteries: RS485 port of BMS and power cable.
Lithium Battery Connection Steps:
- Assemble battery terminals based on recommended cable and terminal size (similar to Lead-acid batteries).
- Connect the RS485 port of the battery to the BMS (RS485) communication port of the inverter.
Lithium Battery Communication and Setting:
Connect the BMS communication cable 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 according to battery parameters.
- Start or stop charging based on battery status.
RS485 Communication Port Pin Assignment:
| Pin number | RS485 Port |
|---|---|
| PIN1 | RS485-B |
| PIN2 | RS485-A |
| PIN7 | RS485-A |
| PIN8 | RS485-B |
LCD Setting for Lithium Battery:
After connecting, complete and confirm the following settings:
- Select program 05 as lithium battery type.
- Confirm program 41/42/43/44/45 setting values.
If communication is successful, the LCD will display specific icons for lithium battery status, including charging voltage, current, and SOC.
Setting for PYLON US2000 Lithium Battery:
For PYLONTECH US2000 lithium batteries, configure the Dip Switches:
- Dip Switch 1: Set to "ON" (1) for baud rate 9600.
- Dip Switches 2, 3, and 4: Reserved for battery group address. "ON" (1) is upper position, "OFF" (0) is bottom position.
Installation Process:
- Use the RS485 cable to connect the inverter and Lithium battery.
- Switch on the Lithium battery.
- Press the Lithium battery for more than three seconds to start it.
- Turn on the inverter.
- Select battery type "Li2" in LCD program 5. If communication is successful, the battery icon will light up on the LCD.
Setting for Lithium Battery Without Communication:
For lithium battery applications without communication, obtain the battery BMS specifications (Max charging voltage, Max charging current, Discharging protection voltage) and follow these settings:
- Set battery type as "LIB" 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 (program 02) to be less than the Max charging current of BMS.
- Set voltage point back to utility source (program 12) to be ≥ Low DC cut-off voltage + 1V.
4. Troubleshooting
4.1. Fault Reference Code
The inverter's LCD display will show specific fault codes if an issue occurs. Refer to the table below for explanations and corresponding icons.
| 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 |
4.2. Warning Indicator
The inverter provides warning indicators with audible alarms and flashing icons for various conditions.
| Warning Code | Warning Event | Audible Alarm | Icon flashing |
|---|---|---|---|
| 02 | Temperature is too High | Beep three times every second | 02 |
| 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 |
| 14 | Fan blocked | None | 14 |
| 15 | PV energy is low | Beep twice every 3 seconds | 15 |
| 19 | Lithium Battery communication is failed | Beep once every 0.5 second | 19 |
| 21 | Lithium Battery over current | None | 21 |
| E9 | Battery equalization | None | E9 |
| bP | Battery is not connected | None | bP |
4.3. 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. Input protector is tripped | 1. Check if batteries and the wiring are connected well. 2. Re-charge battery. 3. Replace battery. Check if AC breaker is tripped and AC wiring is connected well. | |
| Mains exist but the unit works in battery mode. | Insufficient quality of AC power. (Shore or Generator) 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) 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. | |
| 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. | |
| Buzzer beeps continuously and red LED is on. | Fault code 03 | Battery is over-charged. The battery voltage is too high. | Return to repair center. Check if spec and quantity of batteries are meet requirements. |
| Fault code 06/22 | Output abnormal (Inverter voltage below than 190Vac or is 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, please return to repair center. | |
| Fault code 14 | Bus voltage is too low. | If the wires is connected well, please return to repair center. | |
| Another fault code |
5. Specifications
Detailed technical specifications for the ANENJI ANJ-4000W-24V-WIFI Hybrid Solar Inverter are provided below.
5.1. Table 1 Line Mode Specifications
| INVERTER MODEL | 4.2KVA |
|---|---|
| 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) |
| Output power derating: When AC input voltage drops to 95V or 170V depending on models, the output power will be derated. |  |
5.2. Table 2 Inverter Mode Specifications
| INVERTER MODEL | 4.2KVA |
|---|---|
| Rated Output Power | 4.2KW |
| 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 | 24Vdc |
| Cold Start Voltage | 23.0Vdc |
| Low DC Warning Voltage (for AGM and Flooded) | @load < 20%: 22.0Vdc @20% ≤ load < 50%: 21.4Vdc @load ≥ 50%: 20.2Vdc |
| Low DC Warning Return Voltage (for AGM and Flooded) | @load < 20%: 23.0Vdc @20% ≤ load < 50%: 22.4Vdc @load ≥ 50%: 21.2Vdc |
| Low DC Cut-off Voltage (for AGM and Flooded) | @load < 20%: 21.0Vdc @20% ≤ load < 50%: 20.4Vdc @load ≥ 50%: 19.2Vdc |
5.3. Table 3 Charge Mode Specifications
| Utility Charging Mode | |
|---|---|
| INVERTER MODEL | 4.2KVA |
| Max Charging Current (PV+AC) (@VI/P=230Vac) | 100Amp |
| Max Charging Current (AC) (@ VI/P=230Vac) | 80Amp |
| Bulk Charging Voltage (Flooded Battery) | 29.2Vdc |
| Bulk Charging Voltage (AGM / Gel Battery) | 28.2Vdc |
| Floating Charging Voltage | 27Vdc |
| Overcharge Protection | 32Vdc |
| Charging Algorithm | 3-Step |
| Solar Input | |
| INVERTER MODEL | 4.2KVA |
| Rated Power | 4.5KW |
| Max. PV Array Open Circuit Voltage | 500Vdc |
| PV Array MPPT Voltage Range | 60Vdc~500Vdc |
| Max. Input Current | 15A |
| Max. Charging Current(PV) | 100A |
5.4. Table 4 General Specifications
| INVERTER MODEL | 4.2KVA |
|---|---|
| Operating Temperature Range | -10°C to 55°C |
| Storage temperature | -15°C~60°C |
| Humidity | 5% to 95% Relative Humidity (Non-condensing) |
| Dimension(D*W*H), mm | 358x295x105 |
| Net Weight, kg | 6.2 |
6. User Tips
- Initial Setup: It is recommended to complete all LCD settings without turning on the inverter (just let the LCD show, no output). After finishing all settings, restart the inverter.
- Environmental Protection: Utilize the detachable dust cover in harsh environments to prolong the inverter's lifespan.
- Remote Monitoring: Take advantage of the complimentary WiFi module for real-time performance monitoring via your mobile device.
- Battery Optimization: Use the EQ function to optimize battery performance and extend its lifecycle.
- Lithium Battery Compatibility: If using a lithium battery, ensure proper communication setup via RS485 for optimal performance and protection.
7. Warranty and Support
This ANENJI Hybrid Solar Inverter comes with a 1-year warranty.
For further detailed information, including comprehensive diagrams and advanced settings, please refer to the official user manual PDF available at: ANENJI Hybrid Solar Inverter User Manual (PDF).
