Solar and batteries pay off when the numbers fit your roof, your tariff and how you use electricity, and those numbers changed a lot in 2026. US tax credits ended, Great Britain legalised plug-in solar, and Australia started discounting home batteries. These guides show the maths so you can redo it with your own figures.
Calculators for this topic
- Solar Panel Payback CalculatorEstimate solar generation, yearly bill savings and payback time from your system size, local yield, self-use share and export rate.Open calculator →
- Home Battery Payback CalculatorEstimate what a home battery saves by storing surplus solar or charging on a cheap rate, and how many years it takes to pay…Open calculator →
Every figure in these guides links to its source and shows when we last checked it. Read how we research, or tell us if something has changed.