At least in the Bay Area I think a large part of the problem with residential solar is simply local red tape. Systemwide though solar can be a pretty large chu

At least in the Bay Area I think a large part of the problem with residential solar is simply local red tape. Systemwide though solar can be a pretty large chunk of the power grid. Right now renewables are about a third of the current electricity supply (and I believe historically it's topped out at closer to 80-90% under the right conditions) with solar being 80% of that. http://www.caiso.com/TodaysOutlook/Pages/supply.aspx http://www.caiso.com/TodaysOutlook/Pages/supply.aspx