Does the British Isles Have Enough Solar Energy / Radiation?
A popular misconception is that the Sun has to be shining for the panels to work. This is not true as it is radiation from the sun that is harnessed, not sunlight. The UK and Ireland receive more than enough solar radiation to make a solar hot water system a viable prospect. England, Scotland, Wales, Northern Ireland and the Irish Republic receive about 65% of the solar radiation levels experienced in Spain, and about 55% of that at the equator.