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Is switching to solar energy a feasible investment? A techno-economic analysis of domestic consumers in Spain

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  • Codina, Eloi
  • Domenech, Bruno
  • Juanpera, Marc
  • Palomo-Avellaneda, Leopold
  • Pastor, Rafael

Abstract

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.

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  • Codina, Eloi & Domenech, Bruno & Juanpera, Marc & Palomo-Avellaneda, Leopold & Pastor, Rafael, 2023. "Is switching to solar energy a feasible investment? A techno-economic analysis of domestic consumers in Spain," Energy Policy, Elsevier, vol. 183(C).
    • Handle: RePEc:eee:enepol:v:183:y:2023:i:c:s0301421523004196
    DOI: 10.1016/j.enpol.2023.113834
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