An extremely powerful inverter has been developed, using Ignitrons. Unfortunately, the document is behind a paywall. ($35) However, the basic system is shown in patent #US2523094A. Of course, the power of any inverter depends on the size of the transformer.
Hover dam would be hard pressed to keep up with that. LOL
Doug The sky is not the limit...There are footprints on the MOON. Your only as DUMB as where your standing. No matter where you go there you are. You must be logged in to see this link. SKYPE doug.bennett49er