RES coupled with DCHP and PCM heat storage will be of paramount importance for increasing the penetration of low carbon sources of energy into the heating and cooling markets. In fact, DCHPs Today are mainly used to adapt the energy consumption to the required load. This does not take into account the electricity source, particularly important in case of highly variable loads from PV panels. The addition of thermal storage would decouple the heat generation phase from the heat consumption phase. The same DC inverter technology could therefore be used to couple the HP to the solar PV source to convert the available electric load into heat in real time. Any heat generated is then loaded into the PCM storage that is sized in order to satisfy any heating requirements from the building.