Victron Quattro 12Volt 3000VA 120A charging current 230V VE.Bus. The Quattro, like the MultiPlus, is a combined inverter and charger. It can additionally take two AC inputs and automatically connects to the active source. Its many features include a true sine wave inverter, adaptive charging, hybrid PowerAssist technology and several system-integrating features such as three-phase, split-phase and parallel operation.