This business case demonstrates the advantages of a hybrid battery energy storage system combined with a power-to-heat (PTH) solution. The installed thermal PTH system, which is already used for additional applications, provides negative power which is usually limited to the secondary reserve market. By combining both systems, cumulative thermal storage capacity equals installed BESS capacity. In this case, only 600 kWh battery capacity is required instead of 1000 kWh. Overall, this results in a reduced CAPEX of 30–40%.
Combining a battery energy storage system with thermal storage provides the investor with two advantages:
Today's battery market prices vary between €500 and €1,400. With the combined battery energy storage & power-to-heat concept, fewer batteries are required, which results in less investment and faster payback times. Based on a battery price of €600, the payback period of systems with power-to-heat will be 5 years instead of 8.4 years without it.
As a long-term expert in battery and power conversion technology AEG Power Solutions provides a comprehensive solution based on the following systems and services: