Marin Clean Energy claims to offer its Light Green customers 56 percent renewable electricity and Deep Green customers 100 percent for a modest premium, while Pacific Gas and Electric Co. offers just over 20 percent.
How does Marin Clean Energy offer so much more clean energy? Simply by taking a shortcut. It buys large quantities of unbundled Renewable Energy Certificates (RECs), which allow it to procure the same dirty energy that PG&E provides and call it “green.”