Rooftop solar makes sense when independence is a key need. Where I live (San Francisco Bay Area, California, USA) the power utility is extremely corrupt. This m

Rooftop solar makes sense when independence is a key need. Where I live (San Francisco Bay Area, California, USA) the power utility is extremely corrupt. This makes their service the terrible combination of unreliable (sometimes being disconnected for several days at a time) and extremely expensive (they charge about half a dollar per kWh). Being as independent from them for my energy needs as possible means buying solar, and my roof is the only open space I have available.