Residential ESS networks generally work in conjunction with PV domestic systems, where DC voltages won’t be very high, usually not superior to 500V DC. ABB low-voltage portfolio offers a wide range of miniature circuit-breaker and switch-disconnectors with fuses to be used on the DC battery side to provide basic safety functions. To complete the offering, residual current devices type B and a complete range of energy meters specifically designed for interaction and communication are available.
A small commercial or domestic system can be described in its basic components in the following schematic: