Tunbridge Wells Solar Heating Systems...Tunbuild. Solar PV panels are placed on your roof to capture energy from the sun and convert into electricity for use in your home. You save on your energy bills by generating your own power and getting paid for it! Get paid for all the electricity you generate through the Feed-in Tariff scheme and earn on extra electricity by selling it back to the grid. Using our vast knowledge and experience of designing, installing & commissioning solar panels we can ensure that your installation will be designed to perform to its highest efficiency.