A Solar Powered District Heating Project in Bristol uses PV powered heat pumps to charge the ground with summer heat for easier extraction of heat in winter: Solar Powered District Heating .

The CHOICES consortium behind the project decarbonises heating by using green electricity in summer to charge an interseasonal heat store. Ground source heat pumps are used in winter to transfer heat into community buildings without burning fossil fuels. Grid balancing systems are employed to ensure that electricity is not demanded from the grid at times of peak use.

The consortium has created a district heating system based on solar energy and seasonal thermal energy storage which can be scaled up to serve additional buildings and be readily employed in other locations.