Solar thermal panels are designed to heat water rather than generate electricity. They typically use a flat plate or evacuated tube collector mounted on the roof to capture sunlight. Inside the panel, a heat-absorbing surface warms a fluid—either water or a heat-transfer liquid—which then moves through pipes to a storage cylinder. This stored hot water can be used for domestic use, such as showers and washing, or to support central heating systems.
Solar thermal systems work best in sunny conditions but can still contribute in colder or cloudy weather, depending on the system design. They usually need a backup boiler or immersion heater for periods of low sunlight. Regular maintenance includes checking the fluid levels and ensuring the panels and pipes remain free from leaks or blockages. For homes and businesses in the UK, solar thermal can reduce reliance on conventional heating, especially for hot water needs.
