Groo:

I do not have any personal experience, but when I "Webcrawled" (I like to give the underdog search engines a chance.), I get the impression that solar, and wind energy systems are very extensive in Australia.

If they use a lot of those systems there, it would seem to stand to reason that they would have more knowledge than places that make it hard (U.S.A.?) for people to get off the grid.

Good luck.

Bountyhunter