The Mastervolt Mac Plus 24/12-50 is a DC-DC charger taking a 24V source and delivering 50A of controlled 12V output to a service battery.
Smart alternators are the problem this solves. Modern engines with start-stop systems vary alternator output to save fuel, and a service bank wired directly to one never reaches full charge. A DC-DC charger takes whatever the alternator gives and delivers a proper charging profile regardless, while engine-run detection stops the starter battery being drained when the engine is off.
Stepping 24V down to 12V also suits a boat with a 24V engine system and 12V house loads, which would otherwise need a separate charging path. The 3-Step Plus algorithm supports flooded, gel, AGM, spiral, lithium-ion, traction and user-defined profiles including LiFePO4.
A fanless aluminum housing runs silently, and the unit doubles as a stabilized DC power supply for sensitive loads. MasterBus, CZone and NMEA 2000 are all supported for monitoring and automation, and units can be paralleled where more capacity is needed. Ignition protected with overload, over-temperature, short-circuit and reverse-polarity protection. Explore more DC-DC battery chargers.
- Solves the smart alternator charging problem
- A bank wired direct to a smart alternator never fills
- 24V in, 50A of 12V out for a service bank
- MasterBus, CZone and NMEA 2000 supported
