What are combi-units?
A Combi-Unit combines Victron’s pure sinewave Phoenix inverter and their intelligent battery charger together with an automatic transfer switch in one compact enclosure. The benefit is that you only need one box and it’s generally cheaper than two separate units. The additional transfer switch means the unit switches between inverter and charger with an available mains input. In fact it switches so fast it can be used as a UPS.