The Mastervolt Mac Plus 24/24-30 + CZone DC-DC Charger is a rugged, silent solution designed to keep your service battery charged while protecting your starter battery. This 24 V input to 24 V output unit delivers up to 30 A, optimized for marine systems and easy integration with MasterBus, CZone and NMEA 2000.
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Nominal and operating voltages: Nominal input 24 V and nominal output 24 V; input range 10–16 V; output range 20–30 V.
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Power and efficiency: Max output power 850 W; nominal output power 810 W; max current 30 A; efficiency > 95% (peak 97%).
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Charging algorithm: 3-step+ charging delivers fast, safe charging for service batteries.
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Battery chemistry compatibility: Supports flooded, Gel, AGM, and Li-Ion (including LiFePO4).
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Engine run detection: Ensures the alternator charges only when the engine is running, protecting the starter battery.
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Cooling and durability: Fanless, silent operation with a rugged aluminum housing resistant to dust and water ingress.
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Networking and monitoring: Works with MasterBus, CZone and NMEA 2000 for intelligent monitoring and automation; includes a 3-color status LED.
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Parallel configurations: Up to 10 units in parallel for charging capacities well over 100 A in larger systems.
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Voltage stability and sensing: Voltage stabilization helps protect sensitive equipment; analog voltage sense ports compensate for voltage drop; output ripple max 1%.
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Temperature management: Battery temperature sensor and temperature compensation optimize charging across temperatures.
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Setup and configuration: Easy setup via DIP switches; MasterAdjust and CZone configuration tools.
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Protections and alerts: Alarm contact available through MasterBus for system-wide alerts.
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Load support when engine is off: Power supply mode provides stable power for sensitive loads when the engine isn’t running.
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Certifications: E-Mark/R10 certified for mobile/marine applications; Euro 5/6 readiness.
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Included sensors: Battery temperature sensor and battery voltage sense included to maximize performance.
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Rugged installation: Heavy-duty connections designed for marine environments.
By delivering reliable, efficient charging while safeguarding both the service and starter batteries, the Mac Plus 24/24-30 helps prevent stranded moments on the water. Its silent operation, smart integration features, and scalable parallel capability make it a dependable upgrade for modern marine electrical systems.
| Specifications battery charger |
| Battery temperature sensor |
yes, included |
| Battery voltage sense |
Yes |
| General specifications |
| Status indicator |
yes, 3-color LED |
| Communication protocol |
MasterBus, CZone & NMEA 2000 |
| Output voltage |
20-30 V |
| Nominal output voltage |
24 V |
| Output voltage stabilisation |
2 % at extremes of temperatures, load and input |
| Output voltage ripple (peak peak) |
max. 1 % |
| Max. output power |
850 W |
| Nominal output power |
810 W |
| Max. output current |
30 A |
| Output charge current (3-step mode) |
30 A |
| Nominal input voltage |
24 V |
| Input voltage range |
10-16 V |
| Max. input current |
30 A |
| Galvanic isolation |
no |
| Voltage limited |
yes |
| Efficiency |
> 95 % (at nom. input voltage, full load); peak 97 |
| Parallel configuration |
yes |
| Alarm contact |
yes, through MasterBus |
| MasterBus powering |
no |
| Engine run signal input |
yes (active high/active low) |
| DIP switches |
yes, for basic setup |
| Dimensions, hxwxd |
10.0 x 6.5 x 2.6 inch |
| Weight |
4.4 lb |
| Technical specifications |
| No-load consumption |
< 2 mA |
| Charge characteristic |
3-traps+ |
| Battery types |
flooded, Gel, AGM, spiral, Lithium Ion, traction, user defined |
| 3-Step charge option |
yes (DIP switch settings) |
| DC consumption |
< 5 mA |
| Connections |
3 x M8 terminal for cable diameters of 10-50 mm, (positive input, positive output, joint negative connection) 8-pole screw connection for cable diameters of 0.75-1.5 mm (remote on/off, temperature sensor, voltage measurement |
| Temperature range (ambient temp.) |
-25 °C to 60 °C; derating > 40 |
| Cooling |
natural cooling |
| Protection degree |
IP23 |
| Protections |
overload, over temperature, DC short circuit, reversed polarity (fuse) |
| MasterBus compatible |
yes |
