I am inspired by Mosaic (
https://joinmosaic.com/). They are available to all in California and New York (without fees?), and I think accredited investors across the US. Although I was initially drawn to the site as a feel-good, donation-type investment, Mosaic seems to have grown up a lot - they are a smart diversification option for folks looking for something similar to CDs or bonds. I've only invested a few hundred dollars but hopefully they'll email me when they have more projects online. From what I understand, it's not equity in the solar projects, just secured debt - basically I'm making a loan for part of the solar installation itself and will be paid back with interest (4.5%) as those panels generate electricity over time. I wish there were more options like this out there. I've also generally liked Calvert Investments (sustainable mutual funds) and Lending Club, though I would much rather invest in solar than in consumer debt!
Permies, please post if you know of other green investing opportunities like Mosaic. I wish groups like
http://benevolencefarm.org/ had P2P lending instead of just donations - maybe one day!
-Frugal JLW