But hot water isn't as useful as electricity. In summer, when solar is plentiful, radiators aren't run, and showers tend to be cool. In winter, when there's hi

But hot water isn't as useful as electricity. In summer, when solar is plentiful, radiators aren't run, and showers tend to be cool. In winter, when there's higher demand, there's less solar. Electricity is fungible. It can become heat, or light, or compute, or just about anything. Hot water isn't that versatile.