# AC-Coupled Inverter 3–12 kW grid-side AC-coupled inverter for retrofitting storage onto an existing PV system. 3–12 kW grid-side AC-coupled inverter for retrofitting storage onto an existing PV system. Adds storage without touching the existing DC side, with zero-current grid connection and participation in grid demand response. Sizing calculations, simulation and OEM/ODM delivery are available, with voltage level, capacity and interfaces adapted to each project.