The decarbonization of the industrial sector is currently one of the top priorities to meet environmental sustainability targets and to mitigate the impacts of climate change. This master thesis investigates the integration of a Power-to-Heat solution in an industrial context to reduce fossil fuel dependence for heat production. Specifically, the study focuses on the implementation of an electric boiler combined with a thermal energy storage system in the heating circuit of TotalEnergies lubricant blending plant in Madrid, Spain. The proposed system is designed to operate flexibly, leveraging lower electricity prices during off-peak hours to enhance economic efficiency. The analysis, conducted in collaboration with NewHeat as part of the European INDHEAP project, models the plant’s thermal demand and electricity price fluctuations to define an optimal sizing and operational strategy.