At 1:41 PM on Saturday March 8, California hit a new record of solar energy output of nearly 4.1 GW. That narrowly beat out the previous record of 3.9 GW, which was set the day before. It's also more than double the peak solar output from last June, and quadruple the output from the summer of 2012. Coincident demand for the new record was about 22.6 GW, meaning at that peak solar served about 18 percent of demand, roughly enough to power three million homes. All of that data is from California ISO (CAISO), which reported the new mark earlier this week.