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    300 Watt Pure Sine Wave Power Inverter, 12V DC to 110V AC

    5 out of 5 based on 6 reviews | Write a review
    Favorable price pure sine wave inverter provides 300 Watt continuous and 600 Watt peak power, selectable 12/24/48 volts DC input and 100/110/120/220/230/240 Volts AC output, 50/60Hz, reliable DC to AC power inverter with full safety protections, LED indicator, built-in cooling fan with low noise, ideal for charging devices in your car.
    SKU: ATO-PI-300W
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    Low price 300W pure sine wave power inverter for sales, converting 12V, 24V or 48V DC battery power to 110/120/220/240V AC power, best solution for charging your electronics or devices on the vacations, work trips or camping.


    • 300 Watt continuous power and 600 Watt peak power
    • Pure sine wave inverter, capable of producing clean & stable electricity
    • Soft-start technology
    • USB charging port for powering your phone, laptop, etc.
    • Aluminum alloy casing with good heat dissipation
    • Multiple protections against under and over voltage, over load, over temperature, short circuit and input polarity reverse connection
    • ON/OFF switch design, easy to use
    • Intelligent cooling fan, long working life

    Note: Refrigerators or devices similar to refrigerator loads need to choose an inverter with a power of more than 10 times.


    Model ATO-PSWI-300
    Output Power 300 Watt
    Peak Power 600 Watt
    Phase 1- Phase (L, N, G), Do Not provide split phase configuration (L1, L2 + N, G)
    Input Voltage * DC 12V DC 24V DC 48V DC 12V DC 24V DC 48V
    Input DC Voltage Range 10-15.5V 20-31V 40-61V 10-15.5V 20-31V 40-61V
    Output Voltage * 100V AC or 110V AC or 120V AC ±5% 220V AC or 230V AC or 240V AC ±5%
    No-load Current (less-than) 0.3A 0.2A 0.1A 0.3A 0.2A 0.1A
    Output Frequency * 50Hz±0.5Hz or 60Hz±0.5Hz
    Output Wave Pure sine wave
    Waveform Distortion THD<3% (linear load)
    USB Port 5V 1A
    Outlet Type Universal outlet
    Max. Working Efficiency 90%
    Low Voltage Alarm 10.5V±0.5V 21V±0.5V 42V±1V 10.5V±0.5V 21V±0.5V 42V±1V
    Low Voltage Shutdown 10V±0.5V 20V±0.5V 40V±1.5V 10V±0.5V 20V±0.5V 40V±1.5V
    Low Voltage Recovery 13V±0.5V 24V±0.5V 48V±1V 13V±0.5V 24V±0.5V 48V±1V
    Over Voltage Shutdown 15.5V±0.5V 31V±0.5V 61V±1V 15.5V±0.5V 31V±0.5V 61V±1V
    Over Voltage Recovery 14.8V±0.5V 29.5V±0.5V 59V±1V 14.8V±0.5V 29.5V±0.5V 59V±1V
    Protection Low voltage, Over voltage, Over load, Over temperature, Short circuit, Input polarity reverse connection
    Cooling Way Intelligent air cooling
    Remote Control * Wired control (2m) or Wireless control (30m)
    Operating Temperature -10℃~ +50℃
    Storage Temperature -30℃~ +70℃
    Humidity ≤90%, non-condensing
    Dimensions (W*H*D) 186x106x63mm
    Package Size (W*H*D) 235x143.5x82mm
    Net./Gross Weight 0.7kg/1.0kg
    Certificate CE, RoHS
    Warranty 12 Months


    300 Watt Pure Sine Wave Power Inverter Details

    Wiring Diagram

    12V 24V pure sine power inverter wiring
    Note: The wiring of 48V inverter is similar to the 24V inverter, and the batteries are connected in series.

    Protection Functions & Applications

    Pure Sine Wave Power Inverter Protection Functions

    Pure Sine Wave Inverter Safety Protections

    Pure Sine Wave Power Inverter Applications

    Tips: Why a 300W power inverter connected to a car cigarette lighter can’t get a desktop computer start up?

    It is not recommended that you take power from the cigarette lighter to charge more than 120W electrical appliances. The cigarette lighter can only withstand about 10A current and about 100W power, because there is about 2-meter wire connected the battery to cigarette lighter, and the negative polarity of battery is connected to the car shell, causing too much loss of voltage and current. The inverter will not start up when it detects that there is no enough voltage and current to maintain its work. The inverter's best operating voltage is 11-13V.

    Possible solutions:
    1. Change thicker wires from the positive and negative polarity of battery to the cigarette lighter.
    2. Connect the original battery connection clip line of the inverter to the positive and negative poles of the car battery, thus electrical appliances within 300W can be started.

    In this video, ATO makes a simple test on the input and output voltage of 1000W 24 DC to 220V AC pure sine wave power inverter. And, this power inverter is used to power a cell phone and a fan which work normally.

    Existing reviews of 300 Watt Pure Sine Wave Power Inverter, 12V DC to 110V AC
    Perfect for my home
    A 300 watt pure sine wave inverter is perfect for my home. In case of some unexpected situations, such as short circuit or power failure, I can use this pure sine wave inverter to charge my mobile phone. It's convenient and practical.
    From: Drew | Date: 17/08/2022
    Was this review helpful? Yes No (0/0)
    Using when climbing mountain
    I bought this pure sine wave inverter for my father, 300 watt pure sine wave power inverter is just right for him. He likes to take this power inverter when he climbs mountains. A very satisfying shopping.
    From: Farrah | Date: 13/07/2022
    Was this review helpful? Yes No (0/0)
    Easy to carry
    We like to travel with an RV. This 300 watt pure sine wave inverter works wonderfully. We can now cruise down the roads, camp where ever, and remain fully able to work and connect with family and friends.
    From: Enon | Date: 02/06/2022
    Was this review helpful? Yes No (0/0)
    Great 300 watt power inverter
    We secured it on a horizontal space, and it works perfectly. The pure sine wave inverter is as good as I expected. It performed extremely well in a very hot and humid climate. Great product! I would buy it again if I needed another one.
    From: Beahn | Date: 27/03/2022
    Was this review helpful? Yes No (0/0)
    Very happy with this power inverter
    I'm very happy with this pure sine wave power inverter. I had tried many other inverters without good results. And so far I am pleased to have chosen this one. I will buy again and recommend this product.
    From: Shaun | Date: 17/03/2022
    Was this review helpful? Yes No (0/0)
    I am interested in your pure sine wave inverter
    I am interested in your pure sine wave inverter. Did you have service support?
    From: Bradf | Date: 28/12/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, and we honor 18 month warranty.
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