Does solar pay back at your home?
SolarSums is a free calculator. Enter your postcode and roof details and it estimates what solar panels, a home battery and EV charging could cost and save over 20 years.
It uses solar yield data from PVGIS (the EU Joint Research Centre), live tariff rates from the public Octopus Energy API, and installation costs from DESNZ and the Energy Saving Trust. Every assumption is listed on the calculator page and you can change any figure.
The results are an illustrative estimate, not advice. Get quotes from MCS-certified installers before you decide.