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

Bought on sale at a very competitive price. My expectations weren't high, but I was wrong. First I connected an oscilloscope. Good pure sine wave at 60Hz. The no load current was then measured at 0.25A at a supply voltage of 12.6VDC. Measured power consumption at 8.5 W AC low load. The DC consumption was 1.22 A DC at a conversion efficiency of 55%. A 48 W AC load was then connected and the current drawn was 4.6 A DC for a conversion efficiency of 82%. The case stayed cool and the fan never came on. I didn't have a 150 watt load back then, but I'd like to have it. In my case I use it in the 50-100W AC range so I can live with a group 27 deep cycle battery with an 82% efficiency rating. One complaint, I wish they had painted the DC cables. I plan on cutting off the cigarette lighter plug and hard-wiring it to the battery via a 30A fuse. I should be able to figure out the polarity by opening the cigarette plug.