Review on 🚗 Efficient 300W Pure Sine Wave Power Inverter for Car: DC 12V to AC 120V Converter with Dual USB Ports by Dylan Goins

I tested a similar 300W Bestek with the same hardware. This one is weaker, but it resets automatically after shutdown, so you don't have to flick the power button after a failure! This is also quieter and consumes only half as much power in standby (1/4A, 3W). But this consumes significantly more power at full load. Choose your poison. Powering a 90w LED headlight (switch mode power supply) took 100w from my battery, 90% efficiency. Two 180W headlights consumed 210W. Add a soldering iron (resistive load transformer) and 260W draws 330W, reducing the efficiency to 79%. Adding a second soldering gun (larger) to get the load up to 320 watts caused the inverter to shut down immediately. If I disconnect the load fast enough, the current drops but the signal light doesn't go out. When the load was on for a long time, it would alarm and turn on the red indicator, and it would take longer to recover power after the load was turned off. The largest load I could handle was 270W, which used 350W at 77% efficiency. My Milwaukee cord drill didn't work at all. Any variable speed setting, any trigger pull speed would cause this inverter to shut down the output immediately. Even without a load, the drill did not rotate once. A full throttle plugged into an outlet is about 200W. Make sure you're not trying to connect brushed motors. Result? No impulse capacity. It turns off in the 300W period. And he will not use power tools. And while other brands become more efficient as the load increases, this one becomes more wasteful when the load is high.