Solar Panel Savings Calculator
Curious what solar panels could save your home? Use our free calculator for a quick, no-pressure estimate of your yearly savings, payback time and system size. These are indicative figures — your exact numbers come from a free, no-obligation survey by our MCS-certified local team across Dorset, Hampshire and Wiltshire.
How the solar savings calculator works
The calculator estimates the size of solar PV system that suits your electricity use, then works out how much you could save each year from two things: the grid electricity you no longer buy (because your panels power your home directly), and the Smart Export Guarantee payments you earn for exporting surplus energy. It then compares that yearly benefit against a typical installed cost to estimate your payback time.
South-facing roofs generate the most, and homes that use more electricity during daylight hours save the most — though adding a solar battery lets you store daytime generation to use in the evening, which increases savings further.
Solar savings calculator FAQs
How accurate is the calculator?
It gives a realistic ballpark based on typical UK performance and current energy prices. Your real figures depend on your roof orientation and pitch, shading, your exact usage pattern and the equipment specified — which is exactly what our free survey confirms.
How much do solar panels cost?
Most home systems fall between roughly £4,800 and £12,000 installed depending on size, with 0% VAT on residential solar. See our full guide to what determines solar panel cost.
Do solar panels pay for themselves?
For most suitable homes, yes — typical payback is around 6–10 years, after which you generate largely free electricity for the remaining 15–20+ years of the system’s life. Read our honest look at whether solar is worth it.
Ready for your exact figures? Get a free, no-obligation quote from our local MCS-certified team, or explore solar panel installation and battery storage.