http://biz.yahoo.com/p/913conameu.html
(This is a good site, but it represents different types of
utilities. So, once you feel you have found a decent one to start
analyzing, click on the name of the business to see what it specializes
in.)
http://en.wikipedia.org/wiki/List_of_renewable_energy_companies_by_stock_exchange
(For each company you may choose, make sure you click on the "quote" tab to retrieve the financial information.)