Governance & Policy
Renewable Portfolio Standard (RPS)
A mandate requiring electricity suppliers to source a minimum and rising share of power from renewables — the workhorse of US state clean energy policy.
Definition
A renewable portfolio standard is a regulation requiring electricity suppliers to source a specified, typically rising, percentage of their electricity from eligible renewable resources by set dates. Compliance is demonstrated with renewable energy certificates, creating a tradable market for the renewable attribute. Most US states have adopted an RPS or clean energy standard, with several now mandating 100% clean electricity by mid-century.
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