The SONY Fortelion is the energy storage system for residential usage by SONY. It is equipped with SONY Olivine lithium-ion iron phosphate battery modules, each having a backup power capacity of 1.2 kWh. By combining up to 16 battery modules, the system’s capacity can be enlarged to a maximum of 19.2 kWh. The SONY Fortelion has an expected service life of 20 years. Each battery modules costs €1,215.38. The smallest complete Sony Fortelion energy storage system comprises 4 battery modules (4.8 kWh) and is available for €6,612.00.