I was really surprised too - our family (with electric car and a lot of tech) uses only a third of the energy used in TFA! Still, even with our lower usage, so

I was really surprised too - our family (with electric car and a lot of tech) uses only a third of the energy used in TFA! Still, even with our lower usage, solar still makes sense (especially with a South-facing roof) because electricity is so damned expensive in the UK :(