Free planning tool

Free solar calculator

Get PV, inverter, battery sizes plus cost and payback in under a minute. No upsell to see the result.

  • PV / inverter / battery sized for your appliances or your bill
  • Budget · Standard · Premium options side-by-side
  • Transparent confidence score + formula disclosure
  • Optional: request quotes from verified installers

Results are planning estimates. A licensed installer site survey is required before purchase.

Deterministic engine

Same PRD §10 formulas every run. No black-box AI in the sizing path.

Transparent confidence score

See exactly which inputs lifted or capped your score (PRD §11).

Verified installer marketplace

Optional: request quotes from installers vetted in your country.