Could power my upstairs gas stove during a Texas freeze. The stove drew 450W in run mode, 750W in pulsed mode. Measured at a killer watt. My problem is that my car's alternator can't handle 40A of current at idle, the engine has to rev up to 1500rpm. This is not the fault of the inverter. Just something to note. The modem and router with power supply (20 W) without a motor work perfectly.