Tools

Calculators

No signup and no calculator-run telemetry. Household results wait for required inputs; the methodology identifies each formula and omission.

Enter annual use, site-specific production, same-scope price, utility cash flows, and separate source-event dates.

Review the statutory expenditure cutoff and IRS installation-completion rule without inferring eligibility from install year.

Open the source-bound owner ledger for explicit simple or discounted payback cash flows.

Model each entered contract schedule separately, with unsupported structures left unmodeled.

Review appraisal, ownership, contract, and market evidence without applying a national resale multiplier.