The Bay Area will be joined by San Diego, Fresno, LA and other cities in hosting summer “solarthons”–solar installations and block party fundraisers hosted by GRID Alternatives. The idea behind the events is to gather teams of work crews to install solar electric systems for low-income area families (who work alongside the amateur installers). While volunteer spots are all spoken for for this weekend, the endeavor can still use your cash. Consider it karma to get morning sun in SF?