my son's place is off grid. He has a solar array that feeds into a control shed, which feeds the battery shed, which goes back into the control shed and is converted to AC. He runs his small house, well pump and everything else off the solar. No hookup to the power company. I believe the cost was $16K for everything. His father in law, a master electrician hooked it all up. Running trouble free for 5 years now.
