I assume you mean five hundred watt. You can plug it into a standard 110V or 220V outlet. I believe the overall efficiency is about 50% (draws 1000W with 500W output). Al N1AL On Mon, 2010-05-17 at 16:05 -0700, Karl Marderian wrote: > If it only a five watt unit, is there any word on voltage needed. And > for that matter amps. > N6XVT