In sunny San Diego ... some solar hot water. The company uses 24.3% efficient solar cells, slices them into thin strips and surrounds them with reflective mirrors that can boost overall panel ...

San Diego is the most environmentally sustainable ... from recycling to sharing rides to installing solar panels on their homes,” said WalletHub analyst Chip Lupo in a release.

where solar panels dot millions of rooftops in cities like Las Vegas, Phoenix, San Diego and Los Angeles. But still, by and large, homes on the market aren't likely to have solar panels.