First Solar, Inc. and SolarCity Corporation announced a module supply agreement and investment that will make solar power an affordable option for more U.S. homeowners and businesses. The two companies have entered into a five-year agreement that calls for First Solar to supply 100 megawatts of its advanced thin film solar modules to SolarCity, marking First Solar’s entrance into the U.S. residential segment. Pursuant to the agreement, First Solar will begin delivering modules to SolarCity...