Renewable and Alternative Energy Portfolio Standards

Learn about the Massachusetts Renewable Energy Portfolio Standard and Alternative Energy Portfolio Standard, including RPS Class I (formerly RPS), RPS Class II, and APS.

Massachusetts' Renewable Energy Portfolio Standard (RPS) was one of the first programs in the nation that required a certain percentage of the state's electricity to come from renewable energy. The Alternative Energy Portfolio Standard (APS) was established to complement the RPS Program, providing requirements and incentives for alternative electricity technologies.

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