Data Source

U.S. Energy Information Administration (EIA) Open Data API v2

Public domain data, updated hourly

Coverage

7 US ISOs/RTOs: CAISO, ERCOT, PJM, MISO, NYISO, ISO-NE, SPP

Renewable Share

Estimated from ISO capacity mix baselines (EIA-860). For real-time fuel mix, see individual ISO dashboards.