Rooftop solar estimate and electricity rates for any US address, built only from public NASA, EIA and LBNL data.
Monthly and annual output for an equator-facing roof from NASA POWER 2001-2020 irradiance and temperature, with PVWatts-style losses.
Utilities serving the point from retail service-territory maps, with each one's EIA-861 2024 residential rate and typical usage. Retail-choice areas use the state's retail-provider average.
Installed price from LBNL Tracking the Sun, simple payback and 25-year savings, flat-rate and state-trend scenarios. The 25D homeowner credit ended for expenditures after 2025, so owner-purchased 2026 installs get no federal credit.
x402 payments in USDC on Base or Solana, no signup. Bad input is rejected before payment; failed lookups are never charged.
Limits: production is typically within ±10% for an unshaded roof (shading and roof azimuth are not modeled); rates are utility averages, not your tariff; savings assume full net metering; state and utility incentives are not included. Not financial advice.
A real estimate for 200 W Washington St, Phoenix, AZ 85003, generated 2026-10-01. Free, no payment.
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