Top Ten list for Utilities selling renewable energy. Some familiar names continue to be on the list and some new names appear. One surprising ranking was the change in ranking of the top utility with renewable energy sales (megawatt hours /year), Portland General Electric (Oregon) overtook Austin Energy in Austin, Texas, in 2012, selling the largest amount of renewable energy in the nation through its voluntary green power program.
What I found interesting in this article is the wide geographical representation of utilities all over the US. While these utilities sell only a small fraction of the entire renewable energy sold in the US it is noteworthy that these programs are representative of volunteer programs where customers specifically elect to purchase renewable energy.
Here's the entire article