AC blocks (PCS integrated)

Enclosures that ship with the power conversion system inside, so the site gets AC at the terminals instead of a DC bus. Fewer interfaces and one warranty holder, at the cost of less flexibility in PCS choice and typically lower energy per footprint.

Compare rated AC power and duration, PCS topology, grid-code certifications and the split of warranty responsibility. Because PCS is inside, the $/kWh figure is not comparable with DC blocks — keep the two classes apart when benchmarking.