Sine wave should work fine. Do you mean square wave?
If you worry about returns, party like it’s 1999 and buy from a brick’n’mortar store.[/quote]
There are 3 types of UPS.
1. Pure sine wave
2. Square wave.
3. Simulated sine wave (also called step up sine wave). Basically, it looks like a stair case function going up and down.
Think of #3 at taking a analog sine wave signal and running it through an AtoD converter, where the AD converter has lots of steps..
