2026-04-14T02:56:03Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/3959692026-03-31T11:25:30Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Codina Torras, Eloi author Domenech Léga, Bruno author Juanpera Gallel, Marc author Palomo Avellaneda, Leopold author Pastor Moreno, Rafael author 2023-12 Grid-connected photovoltaic (PV) facilities are more attractive than ever due to the electricity price surges and the reduction of solar energy generation costs. This paper develops a solving procedure including a simulation model to analyze the techno-economic performance of PV-battery facilities, taking into account the latest Spanish regulatory framework. The procedure finds the best facilities for multiple objectives, maximum profitability and maximum self-sufficiency, in different locations, load profiles and economic scenarios. The results indicate that PV modules are profitable without subsidies, with installations between 1 and 6 kWp. Meanwhile, batteries are only convenient when seeking maximum independence from the grid, with capacities up to 9 kWh. The findings suggest that the economic feasibility of facilities is influenced by the location and compensation rate surplus electricity, while the facility is mainly determined by the load profile. A sensitivity analysis shows that a variation in grid tariffs and technology prices has a limited impact on the facility's size but modifies the system's profitability. Finally, an analysis of the latest unprecedented grid price surges indicates that self-consumption facilities help become a more resilient society against unexpected events. Therefore, policymakers should keep promoting the adoption of these technologies and keep the current advantageous regulations. Peer Reviewed Postprint (published version) Àrees temàtiques de la UPC::Energies::Energia solar fotovoltaica Photovoltaic power systems Self-consumption Techno-economic analysis Residential solar facilities BatteriesSpain Instal·lacions fotovoltaiques Is switching to solar energy a feasible investment? A techno-economic analysis of domestic consumers in Spain