Walter Schaefer, ERS, for Zondits. May 18, 2016 The recent rapid expansion of rooftop solar capacity in the United States has several well-documented causes, including falling system prices, generous (and extended[note]http://www.greentechmedia.com/articles/read/breaking-house-passes-1.1-trillion-spending-bill-with-renewable-energy-tax[/note]) subsidies, and innovative financing schemes. But can these factors alone explain a boom that has resulted in year-over-year growth rates between 60-70%[note]http://www.greentechmedia.com/articles/read/us-solar-market-sets-new-record-installing-7.3-gw-of-solar-pv-in-2015[/note] and has […]