This bill amends the eligibility criteria for certain thermal energy sources classified under class I renewable energy within the renewable portfolio standard. Specifically, it repeals and reenacts sections of RSA 362-F:4 to clarify that geothermal energy, methane gas, and solar thermal energy are eligible for classification as renewable energy sources, provided that the units generating useful thermal energy must have begun operation after January 1, 2013. The specific sections affected are (b) for geothermal energy, (e) for methane gas, and (g) for solar thermal energy.

The bill aims to ensure that only newer installations of these energy sources are recognized under the renewable energy standards, thereby promoting the adoption of more recent technologies. The effective date of the act is upon its passage, allowing for immediate implementation of these clarifications in the law.