Your latter suggestion (public corporation) exists. Check out Renew Power - they're a large developer from India. The challenge historically has been there are

Your latter suggestion (public corporation) exists. Check out Renew Power - they're a large developer from India. The challenge historically has been there are very few such listed developers. Most of this asset class so far has only been available to very large funds - Goldman, Walburg, etc who operate privately. That's why we entered the space too (see: www.renewables.org - only for accredited investors for now)