Decent article summarizing much of what's been flowing through my reader lately
http://electrek.co/2016/04/28/i-was-wrong-about-the-limits-of-solar-pv-is-becoming-dirt-cheap/
Great episode on Planet Money about falling prices for a home install.
Two main reasons
- overproduction in China
- refined installation process that means it takes 1/4 (maybe less) as much time to install as a few years ago.
http://www.npr.org/sections/money/2015/04/10/398811199/episode-616-how-solar-got-cheap