Calculators
Single questions. Sourced answers.
Free tools on public data: NLR PVWatts production, EIA utility rates, each utility’s rule for exported solar, and LBNL installed prices. Every number names its source and date. No sign-up.
No federal credit: the homeowner credit (§25D) ended for systems installed after 2025-12-31. A lease or PPA price may reflect the lessor’s §48E credit. 26 U.S.C. §25D(h) and (e)(8)(A) · policy as of 2026-09-24
Need the whole system?
The Modeler sizes PV, wind, storage and generators, runs 8,760-hour dispatch, and reports lifecycle cost and outage survival. Businesses start in the Quote Studio.