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    300W (330 VA) UPS Inverter For Home

    5 out of 5 based on 9 reviews | Write a review
    300 watt ups inverter at affordable price for sale online. 330 VA ups inverter with pure sine wave output. 12V, 24V, 48V DC input voltage can be chosen in ATO. Over voltage, over load and short circuit protection is available in ups inverter.
    SKU: ATO-UPSIV-300
    30-day Returns
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    Delivery date: 6-12 days

    300W (330 VA) inverter with uninterruptible power supply. Switch-mode design in 300 watt ups inverter, easy to use. Lightweight and high efficiency pure sine wave ups inverter worth buying.


    • 330 VA ups inverter with pure sine wave output (THD<3%).
    • Built-in 3-stages battery charger, allow to run loads while charging.
    • Automatically switch with a ultra-fast switching time.
    • High efficiency-converts the battery's available power.
    • Pure sine wave 300W ups inverter uses soft-start technology.
    • 90% pure sine wave output, low distortion, waveform and main power line AC waveform are basically the same, equipment accuracy is small, low interference, low noise, strong load capacity, can meet any type of AC load, without damaging the load.
    • Optional crocodile clip and cigar lighters, easy to connect batteries or vehicles’ batteries.
    • Aluminum shell with good heat dissipation and strong shock resistance.
    • Uninterruptible power supply with USB charging port: 5V, ideally qualified for powering your phone, laptop, pc, etc.
    • Intelligent fan for cooling, long use life.
    • LED indicators for power and protections.
    • Switch-mode design in 300 watt ups inverter, easy to use.


    • Model: ATO-UPSIV-300
    • Rated Power: 300W (330 VA)
    • Peak Power: 600W
    • Input Voltage: DC 12V, DC 24V, DC 48V (Optional)
    • Output Voltage: 100V AC, 110V AC, 120V AC, 220V AC, 230V AC, 240V AC±5% (Optional)
    • Output Frequency: 50Hz±0.5Hz, 60Hz±0.5Hz (Optional)
    • Phase: 1- Phase (L, N, G), Do Not provide split phase configuration (L1, L2 + N, G)
    • Output Waveform: Pure sine wave
    • Waveform Distortion: THD<3% (Linear load)
    • Cooling Method: Intelligent air cooling
    • Power Switching Time: ≤ 9 ms
    • USB Port: 5V 1A
    • Max. Efficiency: 90%
    • Working Temperature: -10 ℃— +50 ℃
    • Storage Temperature: -30 ℃— +70 ℃
    Input Voltage DC 12V DC 24V DC 48V (if you want, please contact us)
    Unload Current Less Than 0.3A 0.2A 0.2A
    Input Current 20A 10A 5A
    Input Voltage Range 10-15.5V 20-31V 40-61V
    Low Voltage Alarm 10.5±0.5V 21±0.5V 42±1V
    Low Voltage Protection 10±0.5V 20±0.5V 40±15V
    Over Voltage Protection 15.5±0.5V 31±0.5V 61±1V
    Low Voltage Recover 12.3±0.5V 24±0.5V 48±1V
    Over Voltage Recover 14.8V±0.5V 29.5V±0.5V 59V±1V

    Dimension (Unit: mm)

    300w UPS inverter dimension

    UPS Inverter Output Socket (Optional)

    UPS inverter optional sockets

    Advantages of UPS Inverter

    UPS inverter advantages

    Tips: UPS Inverter Troubleshooting

    The battery or charging circuit is faulty. Check whether the input and output voltage of charging circuit is normal; If the input of the charging circuit is normal and the output is abnormal, disconnect the battery and test again. If it is still abnormal, the charging circuit is faulty. If the input and output of the charging circuit are normal after the battery is disconnected, it indicates that the battery is damaged.

    Battery power supply over current. Whether the inverter breakdown; the battery voltage is too low. If the battery voltage is too low, check whether the battery charging circuit is normal. If the battery charging circuit is normal, check the battery voltage to check whether the circuit works normally.

    After the ups is started, nothing is displayed on the panel. Check whether the mains input fuse is burnt out; check whether the battery insurance is burned down, because some ups will turn off all the output and display of the ups when the battery voltage cannot be detected by itself. Check whether the mains test circuit works normally.

    How to Diagnose Inverter Problems and Repair
    An inverter is a power conversion device. The basic working principle of an inverter is to convert direct current into high-frequency, high-voltage alternating current through pulse width modulation (PWM) technology. The core part of the inverter is a PWM integrated controller, which is responsible for generating PWM signals and converting DC power to AC power through MOS switching tubes. A blown fuse is one of the most common reasons why an inverter has no output. This video will show you how to perform a simple diagnosis of a failed inverter and how to fix the problems.

    Existing reviews of 300W (330 VA) UPS Inverter For Home
    Inverter operation
    I would like to connect 2 WVC350 and lead them into one socket.
    In Germany, 600W (in the future 800W) is currently only allowed on a household outlet.
    Therefore I combine 2 WVC350W on one cable which feeds into the 230V socket.
    The inverters are max 1m away, so a Y-cable with approx. 50cm branch length is sufficient.
    If the cable should be smaller, I have to move the inverters together. But it is important that the inverters synchronize cleanly to the house network.
    From: herman | Date: 07/06/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, we can provide this Y-cable for connecting 2 inverters.
    According to your description, the maximum distance between the two inverters is 1 meter, but we also need to know the distance from the inverter output cable to the socket. Please refer to the attached instruction.
    A few question about inverter
    Thanks for your reply. The internal rectifier simplifies things indeed.To confirm, we would only need to connect the alternator directly to the inverter, correct?
    Just a few final questions- What electrical protections are included in the inverter?
    To which standards is the inverter certified?
    From: isabel | Date: 05/02/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    1. Yes, you guys just need to connect the alternator directly to the inverter.
    2. The electrical protections of the inverter include: over voltage protection, under voltage protection, over frequency protection, under frequency protection, over current protection, and anti-islanding protection.
    3. The inverter has VDE and SAA certification.
    Works well in camper
    I recently used these inverters at night inside my camper to charge devices. Apparently this is very unusual and not the norm for these 300W ups inverters, they should last for a long while quite easily.
    From: Matte | Date: 13/12/2022
    Was this review helpful? Yes No (0/0)
    Enough power for camping
    There isn't a better value for my money anywhere. This 300W ups inverter seems well made, and it's not huge. I need it for minimal power needs when camping so it's enough power. It's not loud at all.
    From: Barrel | Date: 10/11/2022
    Was this review helpful? Yes No (0/0)
    Suitable for household appliances
    This 300W ups inverter is suitable for a variety of household appliances as described on the page, and is a good helper for home appliances. I will order more and recommend everyone to buy it.
    From: Drosy | Date: 31/10/2022
    Was this review helpful? Yes No (0/0)
    300W ups inverter works perfectly
    The 300W ups inverter works perfectly and makes no noise. The most important thing is that the price is very affordable. I use this ups inverter a lot.
    From: Barrel | Date: 11/08/2022
    Was this review helpful? Yes No (0/0)
    Awesome 300W ups inverter
    High quality ups inverter. I took this 300W ups inverter on a camping trip a while back. It's very practical and helps charge my phone. Highly recommended!
    From: Javier | Date: 10/07/2022
    Was this review helpful? Yes No (0/0)
    High quality 300W ups inverter
    The quality of this 300W ups inverter is very good. I use it to charge my laptop. Charging is fast, and I can work while charging. Highly recommended!!
    From: Farrah | Date: 27/06/2022
    Was this review helpful? Yes No (0/0)
    Really happy with this ups inverter
    This ups inverter seems to do a great job supplying AC to the RV and keeping the battery's charged. I've been really happy with this 300 watt ups inverter, it's work very well so far no problems.
    From: Biaxy | Date: 01/06/2022
    Was this review helpful? Yes No (0/0)
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