yep, a big, several hundred watts, class Aamp is a heavy draw and should have a clean sine wave to avoid inefficiency in the power supplies and possible hum.
Same applies in the home where you need proper switching between the inverter and the grid as well as good sine wave forms for all your home stuff. But you're not going to power either of these kinds of loads for long with batteries unless you have a big bunch of them in which case managing a multi battery system gets complicated for reasons of ballance. Running big loads for long times from batteries is not yet ready for prime time and can get very expensive and rather dangerous. tom Net-Tamer V 1.13 Beta - Registered
