To the OP ...
Ignoring the feeble attempts by some to downplay the risks involved in using an MSW inverter consider this comment posted recently by forum member
Naio in this discussion ...
"My two laptops charged fine on a MSW inverter... and then, a couple weeks later, one died completely and the other needed a new battery. I don't recommend risking it."Hard as it may be for some to believe, manufacturers who design and build these inverters all recommend caution before using an MSW inverter as not all electrical devices can be safely be powered with one ... with a sine wave inverter that closely emulates shore power they can. Fact, not theory. ;)