Integrating lithium-ion and thermal batteries with heat pumps for enhanced photovoltaic self-consumption

Alicia López-Ceballos, Carlos del Cañizo, Ignacio Antón and Alejandro Datas

Applied Energy, 2025, vol. 390, issue C, No S0306261925004970

Abstract: A promising solution to fully decarbonize the energy consumption of buildings consists of hybridizing solar PV installation with lithium-ion (Li-ion) batteries and heat pumps. However, the high capital cost per unit of energy storage of Li-ion batteries often results in systems with relatively small storage capacities, leading to low self-consumption ratios. Thermal batteries with power generation capacity, such as Power-to-heat-to-power storage (PHPS), leverage the significantly lower cost of thermal energy storage to increase the overall storage capacity of the system. In addition, PHPS systems generate heat as a by-product during the energy conversion, which can be used directly in the building to supply its heating demand.

Keywords: Solar; Photovoltaics; Self-consumption; Thermal energy storage; Power-to-heat-to-power; Thermal batteries; Cogeneration; Combined heat and power; Heat electrification (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1016/j.apenergy.2025.125767

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