Sonoma Clean Power will build the largest floating solar array in the U.S., a project that’s scheduled to be completed in 2016 and will create enough energy to power 3,000 houses. The array will span six wastewater ponds filled with treated sewage. Floating solar, which typically involves installing solar panels on pontoons that rest on the surface of a body of water and is also called “floatovoltaics”, has been installed in California before.