The RESOL Smart Displays SD3 and SDFK are used for visualising data issued by the controller. The Smart Display SD3 indicates the collector temperature, the store temperature and the energy yield of the solar thermal system. In the heating area, the Smart Display SDFK indicates the solid fuel boiler temperature and the bottom/top store temperatures as well as the pump status. Both Smart Displays are designed for simple connection to RESOL controllers with VBus®. An additional power supply is not required.