sine wave ups pic microcontroller
Huh? There are entire cities run off of UPS, they're hardly just for temporary use..
Hardly that impossible to build one yourself. Not necessarily cost effective in the USA etc, but makes much more sense in other countries.
OP look up Magic Sinewave stuff, there's little sense in worrying about a true sinewave generator when you can do it very well digitally. That said, still, no kidding get someone in USA to buy you one and ship it to you. My name brand 750W UPS was only $10 after rebate.. Usually more like $50 though, that was a very rare deal..
Heck get it from China, that's probably where they're made anyway and no shipping here and back so less gas lol. Problem is it'll probably cost 3x as much not coming from a USA retailer..