Renewable portfolio standards (RPS) are an important part of the U.S. renewable energy policy landscape.Twenty-nine states, from California to North Carolina, have enacted these policies to require utilities to provide at least some of their power from renewable sources. This year, at least fourteen of these states considered bills that would have watered down or repealed these policies. But these rollbacks proved to be unpopular, and on balance state legislatures have made RPS policies more ambitious in 2013.
Taken together, RPS policies will require nearly 10% of electricity sold in the U.S. to come from renewable sources by 2020. And with the help of federal tax credits, grants and loan guarantees, most RPS policies appear to have had limited impacts on electricity rates so far. But every state’s RPS is different, and the diversity of policy designs is a great opportunity to learn what is working well and what can be improved in these policies.