About Sun Maths

Sun Maths is a small, independent website of free solar calculators for UK homeowners, made in England.

Solar quotes are often full of jargon and optimistic sums. These calculators give you an honest, independent estimate first, so you know what to expect and can judge the quotes you get.

The figures use current UK electricity prices, published installation costs and computer-modelled sunshine data, and each guide says where its figures come from.

An estimate, not a quote

Every roof and every home is different. Use these results as a starting point, and always get quotes from MCS-certified installers before you decide.