Solar Panel Payback Calculator
Estimate how long solar panels may take to pay back from installation cost, annual generation, self-use and export assumptions.
Annual value = self-used generation x import price + exported generation x export price.
What this does not include
This simple payback does not include inverter replacement, finance interest, maintenance, roof work, shading or future tariff changes.
Why export rates matter
When export rates are low, using more electricity at home is usually more valuable than sending it back to the grid.
Solar payback FAQ
What is simple solar payback?
Simple payback divides installation cost by estimated annual value. It does not include finance, maintenance or future tariff changes.
Why does self-use matter?
Electricity you use at home usually saves more than electricity exported to the grid, so self-use can strongly affect payback.