Rex Parris, the mayor of Lancaster, California, wants every new home in his city to host solar. And starting next January, that could be a reality. Yesterday in Lancaster, homebuilder KB Home celebrated its 1,000th new home with solar panels from SunPower. Speaking at the event, Mayor Parris announced his city will institute a first-of-its-kind requirement that solar be installed on every new single-family home built in Lancaster after January 1, 2014. The new law will be written into Lancaster’s “Residential Zones Update” on residential solar. Along with a range of green building provisions, it specifies that new single family...