Solar Calculators

Solar quotes are full of assumptions — these calculators are being built to let you check them yourself. The panel-sizing tool will work from your actual monthly consumption and local sun hours to estimate system size; the payback calculator turns system cost, generation and your tariff into a break-even year; and the battery tool sizes backup storage from the loads you actually need during an outage.

Solar economics vary hugely by location, tariff structure and incentives, so treat results as planning estimates to compare against installer proposals — a quote that's wildly off from the math deserves questions. As always, everything runs in your browser and your usage data stays on your device.