Residential installations of solar PV hit a record high in the third quarter of 2012, according to a new report published by GTM Research and the Solar Energy Industries Association (SEIA). The US Solar Market Insight: Third Quarter 2012 reports that more than 118 MW of solar PV capacity was added to the United States residential sector in Q3, a growth of 12 percent since last quarter and the strongest showing ever in a single quarter.