Advocates for renewable energy hail net-metering as a key policy so that electricity from solar and wind is generated at the same place where it is consumed.

Supporters refer to it as the policy that lets the electric meter spin backwards. It allows people who own solar power systems, for example, export electricity to the grid and earn credits — at retail prices — on their utility bill.

In a new report called “Freeing the Grid,” advocates with several groups grade each state on their net-metering policies.

Environmental trendsetter California tied for fifth, but Colorado got the top spot.

Delaware, Maryland and New Jersey followed Colorado in the ranking, while California, Oregon and Pennsylvania tied for fifth.

Seven states flunked by default. Those states  — Alabama, Alaska, Mississippi, South Carolina, South Dakota, Tennessee and Texas — have no statewide net-metering policy.

The report also looked at how states fare on another key policy: interconnection standards, which determine how a generator on a customer’s site plugs into the electricity grid.

The study named Virginia, Illinois, Oregon, Washington, DC and Maryland as the top winners, respectively, in that realm. California came in at number 12, with a B.

(Photo Credit: Cheryl Ravelo / Reuters)