The proposed project will develop a new heat pump that uses unglazed photovoltaic thermal (PVT) collectors as a source of heat and power (the heat pump will be protected by a utility model), based on previous research in the field of refrigeration and renewable energy. The heat pump will be demonstrated in laboratory conditions as a working sample by the end of June 2025. The second parallel project objective is to design the hydraulic circuit and optimise the operation of a conventional heat pump available on the market, which uses heat from ground boreholes in combination with PVT collectors. The semi-operation of the optimized hydraulic circuit will be demonstrated on a real installation of a heat pump with ground borehole and PVT collectors in a family house by the end of the project.