Free, no sign-up calculators to help you make sense of solar panel costs, savings, and payback — based on real UK data.
Work out whether a solar diverter will save you money by heating your hot water with surplus solar.
Find the right battery size for your solar system and find out whether a battery will pay back within its…
Calculate how many free solar miles you can drive each year and your annual saving on EV charging.
Find out how many solar panels will fit on your roof and what size system you can install.
See realistic low, typical, and optimistic cost and savings estimates for your solar installation — based on 2026 UK data.
Calculate your solar panel costs, annual savings, and payback period with low, typical, and optimistic scenarios — based on 2026…