Solar panel performance in winter in the UK is lower than in summer, but panels still generate electricity on clear, cold days. Solar panels rely on sunlight, not heat, so they can actually be more efficient in cooler conditions. The main limiting factor in winter is shorter daylight hours and more frequent cloud cover, which reduces overall generation.
Snow is usually not a major issue in the UK because panels are smooth and angled, so snow tends to slide off. Even when panels are covered briefly, the sun often clears them quickly. For most households, a solar system will still produce useful energy in winter, but the annual output will be much higher in the sunnier months.
