Can I use an AC inverter on a car to charge a battery?

Yes. The DC-AC inverter plugged into the car needs to be a Sine Wave Inverter that has at least 130 Watts. We suggest 200W or more. Our chargers are bivolt so you can use it at a 110VAC or 220VAC output.

Keep in mind that charging the battery from a car battery will drain the car battery unless the car is running.

Also be wary of the connections, cabling, heat and such. As there are several precautions to have in mind while doing this.

Link: Can I use a solar panel to charge my battery?