I recently started an alternative power collection here on Dreamstime. Alternative/renewable power sources are certainly a hot topic in today's society. Thankfully, there are many great photos of alternative power sources. I've tried to pickup some of those that I think are particularly well-executed or unique.
Naturally, I've thrown a few of my solar panel shots into the collection, but there are many other great shots from a variety of photographers.
Here's a link to my collection: alternative power collection
Here are some sample photos in my collection: