This study investigates the integration of solar photovoltaic (PV) systems for electricity generation as a sustainable energy solution to power high-temperature heat pumps (HTHPs) in typical guesthouse buildings. Considering Albania’s significant solar energy potential and the rapid growth of its tourism sector, the proposed approach aims to reduce greenhouse gas emissions, lower operational energy costs, and improve energy performance in guesthouses that accommodate an increasing number of tourists. The research analyzes the technical and economic feasibility of implementing solar PV systems sized to meet the electricity demand of HTHPs under Albania’s climatic and regulatory conditions. The research analyzes the technical and economic feasibility of implementing solar PV systems sized to meet the electricity demand of HTHPs, as well as the potential for year-round operation in varying climatic conditions. A case study of a representative guesthouse building is presented to evaluate system performance, energy savings, and payback period. The results demonstrate that coupling solar PV with high-temperature heat pumps offers a viable pathway to decarbonize heating systems in the hospitality sector, especially in regions with high solar potential.