I'm not sure what took so long, but the dramatic drop in solar panel prices in the past few years surely helps to make such a project much more affordable and competitive. (treehugger.com)
It shows the drop in solar panel prices over 36 years. (treehugger.com)
Average solar panel prices have fallen by 55 percent since 2010 even as German government support has begun dropping sharply. (discovermagazine.com)