RateGrid makes solar math answer to the tariff

Why it surfaced

RateGrid ties each encoded tariff to a utility filing, sheet number, and effective date, then exposes endpoints for comparing plans, calculating solar bills, valuing battery dispatch, and tracking rate changes. Its unusually candid documentation labels perfect-foresight dispatch as an upper bound and returns warnings for unmodeled features instead of silently dropping them.

An API for current US electricity rates, NEM 3 export credits, solar billing, and battery-dispatch economics.