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    4000 Watt 24V/48V Pure Sine Wave Inverter Charger

    4.7 out of 5 based on 4 reviews | Write a review
    High efficiency pure sine wave inverter / charger outputs 4000W continuous power and 12000 surge power, low frequency type, optional 24V or 48V DC input and 110V/120V or 220V/230V/240V AC output voltages, also available with 240V AC input & 120V/240V AC split phase output, real-time LCD display, easy to install, with protections against overload, over-temperature, low battery and overcharge, ideal for powering most household appliances.
    SKU: ATO-PI-LW4000
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    4000 Watt off grid inverter battery charger delivers reliable pure sine wave power from 24V/48V DC battery source, low frequency type with transformer, UPS function. The combined inverter / charger is ideal for powering refrigerators, air conditioners, TVs, fans, computers, audio/video components or other equipment, appliances and electronics. It is widely applied in wind generator, solar power system, house, vehicle, ship, navigation, mobile electricity work and telecommunications device, launch station and any places where the city power is needed.


    • 4000 Watt continuous output power
    • Peak power is 3 times of rating power
    • Pure sine wave output, available for sensitive loads such as air conditioner, motor door, etc.
    • Fast and powerful inverter charger, 3-step progressive charging, 7 battery type selector
    • High power factor
    • Automatically transfer between battery and line mode
    • Microprocessor control guarantees the high reliability
    • Optional remote control function
    • Multi safety protections against over load, over temperature, over charging, and low battery
    • LCD digital display shows voltage, load and battery info in real time
    • Apply for split phase system, 2 live lines 1 neutral line, and voltage is 120V/240V

    4000W Inverter/Charger Specification

    Model LW4000
    Power 4000 Watt
    AC Input Phase Single Phase
    Waveform Pure Sine Wave
    Voltage* 110V/120V AC or 220V/230V/240V AC
    Acceptable Voltage 95-126V AC or 194-253V AC±4%
    Low Line Disconnect 85V AC±4% or 184V AC±4%
    Low Line Re-connect 95V AC±4% or 194V AC±4%
    High Line Disconnect 136V AC±4% or 263V AC±4%
    High Line Re-connect 126V AC±4% or 253V AC±4%
    Frequency 50Hz: 41-54Hz or 60Hz: 51-64Hz (Auto detection)
    AC Output Phase & Waveform Single Phase & Pure Sine Wave (bypass mode sync to input)
    Voltage* 110V/120V AC or 220V/230V/240V AC
    120V/240V AC split phase output Also Available: L1+L2=240V, L1+N=120V, L2+N=120V
    Voltage Regulation ±10%rms (bypass mode sync to input)
    Frequency 50Hz±0.3Hz or 60Hz±0.3Hz (bypass mode sync to input)
    Peak Power 3 times of rating power (12000W)
    Short Circuit Protection Yes, shutdown after 10ms
    Power Factor 0.9-1.0
    Outlet Wiring terminal block
    DC Input Battery Voltage* 24V DC 48V DC
    Minimum Start Voltage 20V DC 40V DC
    Low Battery Alarm 21±0.6V DC 42±1.2V DC
    Low DC Input Shut-down 20±0.6V DC 40±1.2V DC
    High DC Voltage Alarm & Fault 32±0.6V DC 64±1.2V DC
    High DC Input Recovery 31±0.6V DC 62±1.2V DC
    Max Charger Current 20A/35A/50A/75A/90A (According to the inverter model)
    Efficiency Line Mode >96%
    Battery Mode >85%
    General Power Saver Load ≤ 25W (Enabled on "P/S auto" setting of Remote control)
    Audible Alarm Sounding when the heat sink's temperature is over 105℃ and shutdown after 30 seconds.
    Over Load Protection 110%<load<150%, beeps 0.5s every 1s, and Fault after 60s.
    Load>150%, beeps 0.5s every 1s, and Fault after 20s.
    Protections Low battery, over charging, over temperature, over load
    Remote Control* Wired remote control (5m) for power on/off
    Indicators LCD display
    Operating Environment 0-40℃, 0-90%℃ RH (non-condensing)
    Protection Grade IP20
    Audible Noise <60dB
    Net Weight 35.5kg
    Dimension (LxWxH) 660×225×200mm

    * It can be selected in the drop-down list.


    4000 Watt Pure Sine Wave Inverter Charger Details

    Inverter/Charger Working Principle & Applications

    power inverter charger working principle and applications

    Inverter Split-Phase Output Terminal Description

    Inverter Charger Split-Phase Output Terminal Connection

    Tips: Daily Maintenance of Power Inverters

    1. Check whether the load is within the rated power, the voltage range and current of the power inverter.

    2. Maintain your inverters properly and regularly: use wet cloth to wipe out the external dust and dirt of the inverter; tighten the screw of the DC input terminal; use high-pressure air gun to clean up the internal dust and foreign matter.

    3. Inverter must be turned off when cleaning and maintenance is carried out.

    4. In the process of maintaining inverters, it is best to do the following:

    • First, periodically check whether the line part is intact. If there is something abnormal, it is necessary to timely replace.
    • Secondly, in the process of using the inverters, it is necessary to stop and check immediately if there is a problem. Only after the problem is solved, can the inverters continue to be used.
    • Thirdly, in the process of maintenance, the failure of unknown cause should be recorded in advance, and then ask the manufacturer to deal with it.
    • Fourth, when cleaning inverters, it is necessary to use soft cloth for scrubbing, not to use too much friction scrubbing tools.
    • Fifth, periodically check whether its heat sink and seal are blocked or not. If so, dust should be disposed of in time.
    Existing reviews of 4000 Watt 24V/48V Pure Sine Wave Inverter Charger
    Efficient Inverter Charger
    A few days ago, somebody messed around with the settings and set the charger to 80 amps at 100%. I've got two 24V battery banks wired parallel and even though the batteries read 100% it still gives them 30V. I found a manual online that showed how to adjust the settings and it showed 6 different settings that can be changed. When I go through the settings it only lets me change 2 settings, VAC output and Hz. Maybe I'm missing something or maybe the charger is just bad at this point but any help would be appreciated.
    From: Zenn | Date: 13/05/2024
    Was this review helpful? Yes No (0/0)
    ATO Responded
    You can send us a picture of the inverter nameplate label you received to confirm the specific model. Our email address is Regarding the settings of the inverter, you can refer to this manual for instructions. See on:
    High flexibility and adaptability
    The ability to choose between 24V and 48V configurations adds flexibility to meet different power system requirements.
    From: Fiora | Date: 23/11/2023
    Was this review helpful? Yes No (0/0)
    4000w inverter charger
    Can your inverter charger output split phase?
    From: Eric W. | Date: 04/12/2019
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Our inverter charger is available with 240V AC input to 120/240V AC split phase output.
    Easy to install, and works great.
    This inverter charger was purchased to replace the damaged one in my RV. The old one was 2000 watts, and I would need an upgrade one - 4000w inverter charger - for the batteries are always fully-charged and powering more devices on the road trip. This was easy to hook up, just disconnecting the wires from the old unit and connecting the new ones. So far, works great.
    From: Julian | Date: 12/11/2019
    Was this review helpful? Yes No (0/0)
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