Somewhat off-topic. I'm all for solar, but there are some nasty practices out there with the "free" installs (lease). To maximize energy-harvesting potential, many "free" solar installers don't seem to care at all about ruining the look of nice houses, for example stuff like this [1], reducing the value of the home and increasing the time to sell. There are many horror stories about unexpected liens on homes [2] preventing a sale and/or refinancing. I'll jump on solar as soon as they make affordable panels that resemble shingles (they exist, I know [3], but expensive)

[1] http://www.greensunnj.com/resource/1430381659000/Bad_Princet...

[2] http://watchdog.org/212170/surprise-solar-liens/

[3] http://cleantechnica.com/2015/02/08/solar-shingles-renewable...