Solar panels still work on cloudy days, but they produce less electricity than in direct sunlight. Solar panels generate power from daylight, not just from clear skies, so even on overcast days they can still generate a useful amount of energy. In the UK, it’s common for solar systems to produce lower output in winter or during long periods of cloud, but they can still contribute to household electricity use.
The exact reduction depends on the thickness of the cloud cover and the angle of the panels. Systems with battery storage can help by saving excess energy generated on sunnier days for use when output is lower. A professional installer can also recommend the best panel type and placement to maximise performance in your specific location.
