Victron - Quattro 48/5000/70-100/100 120V VE.Bus [QUA485021100] Inverter VE.Direct 12V 120V The Buck-Boost DC-DC Converter is

The Buck-Boost DC-DC Converter is a DC-DC converter for charging a 12/24V service battery in vehicles with an intelligent dynamo

while combining the L1 and L2 outputs for single-phase 120V on each line

Discharging the accessory battery for example will not result in also discharging the starter battery

New model: MultiPlus 20k

Victron - Quattro 48/5000/70-100/100 120V VE.Bus [QUA485021100] Inverter VE.Direct 12V 120V The Buck-Boost DC-DC Converter isSimilar to the MultiPlus, the Quattro is also a combined inverter and charger. Additionally it can accept two AC inputs and automatically connect to the active source. Its many features include a true sine wave inverter, adaptive charging, hybrid PowerAssist technology plus multiple system integration features such as three or split phase operation and parallel operation.