Expanding from one 18kW inverter to six parallel units increases the combined nominal output capacity to 108kW. However, the larger system requires coordinated electrical infrastructure rather than simply adding more inverters. Parallel operation involves communication between units, suitable AC distribution, protection coordination and sufficient battery power. At higher output levels, the combined DC current demand becomes a major consideration in battery and conductor sizing. For a larger three-phase off grid solar system, planning the battery architecture, switchgear, equipment space and future load requirements before the initial installation can simplify later expansion. The 108kW rating represents the combined inverter output capacity. Sustained operation at that level still depends on the available solar generation, stored battery energy and overall system design.
