Victron MultiPlus 12/500 - 20-16 - 120V - VE. Bus UL Approved [PMP121500100]MultiPlus 12 500 20 16 120V VE. Bus UL Approved The MultiPlus is a powerful true sine wave inverter, a sophisticated battery charger that features adaptive charge technology, and a high speed AC transfer switch in a single compact enclosure. Next to these primary functions, the MultiPlus has several advanced features, as outlined below. Parallel Operation and Three Phase Capability Up to six Multis can operate in parallel to achieve higher power