Central PCS topology
Also known as: Central inverter, Centralized PCS
A power conversion system topology in which one Central PCS converts DC from several battery strings or DC blocks into AC at a single point. It is the alternative to a string (distributed) topology, which spreads conversion across many smaller units.
In energy storage
Central PCS topology designs concentrate conversion in a few larger BESS units, often with 1 to 4 MVA PCS equipment. The trade-off is granularity and resilience: a single unit fault takes a larger block of capacity offline, and control is coarser than a string design. Common in utility-scale BESS where cost and footprint dominate.