Solar water heating systems use free heat from the sun to warm domestic hot water. A conventional boiler or immersion heater is then used to provide hot water when solar energy is unavailable.

How do solar water heating systems work?

Solar water heating systems use solar panels, called collectors, fitted to your roof. These collect heat from the sun and use it to warm water which is stored in a hot water cylinder.

A boiler or immersion heater can then heat this water further until it rea...