Battery to Battery Charger Mac Plus 12/12-50 + CZone Mastervolt

✅ Smart charging 12/12-50 for leisure battery.
🔧 Optimizes charging in vehicles with smart alternators and start-and-stop.
⚓ Compatible CZone
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BATTERY TO BATTERY CHARGER MAC PLUS 12/12-50 + CZONE MASTERVOLT: SMART CHARGING SOLUTION FOR SERVICE BATTERIES
The Battery to Battery charger Mac Plus 12/12-50 + CZone by Mastervolt is designed to optimize energy management on board your boat, camper or converted truck. It ensures efficient recharging of your service battery, even in vehicles equipped with smart alternators and start-and-stop systems, which can compromise conventional charging.
OPTIMIZED AND CONNECTED CHARGING
This DC-DC charger compensates for voltage drops due to cable length and stabilizes the charging voltage, thus protecting your service battery and sensitive equipment. Thanks to its 3-step charging algorithm, it guarantees fast and safe recharging, extending the life of your battery. Integration with CZone, NMEA2000 and Masterbus allows centralized control of your on-board circuit, providing precise monitoring and automation of charging processes.
RELIABILITY AND VERSATILITY
The Mac Plus is compatible with different types of batteries, including lithium-ion batteries. Its robust housing and fanless design ensure quiet operation and a long service life, even under difficult operating conditions. It also offers intelligent features such as parallel operation and voltage stabilization.
Avoid service battery problems!
The Mac Plus 12/12-50 + CZone charger from Mastervolt is the ideal solution for your on-board electrical network. Modern vehicles with smart alternators and start-and-stop systems are power-hungry. The Mac Plus DC-DC charger ensures sufficient charging of your service battery at all times.
Typically, a service battery is linked to the starter battery via a charging relay. The starter battery is located near the alternator and receives the most charging current. While the service battery is usually further away. Cable lengths cause voltage drops that slow down charging, which causes faults in the device and premature battery failure.
Modern, energy-efficient engines are equipped with smart alternators in accordance with regulations such as Euro 5 and Euro 6. Instead of delivering a constant current, smart alternators provide a variable voltage. After a brief charging period, the voltage is reduced and charging stops. In addition, the energy produced by regenerative braking leads to voltage peaks. Conventionally connected service batteries would hardly receive any charging current and would be damaged by voltage spikes.
To solve these problems, Mastervolt presents the Mac Plus DC-DC chargers, available in 12 and 24 V. The Mac Plus monitors the service battery and compensates for voltage losses. The proven efficiency of the 3-step algorithm guarantees fast and safe charging. In addition, by stabilizing the charging voltage, Mac Plus protects the service battery and sensitive equipment.
The Mac Plus is your battery's best friend. It monitors your service battery, ensures that it is always well charged, and maximizes its lifespan.
Connected and smart
The Mac Plus + CZone charger from Mastervolt is not just a battery-to-battery charger. Thanks to integration with CZone, NMEA2000 and Masterbus, it becomes the central element of your on-board circuit. Monitor all important parameters, adjust charging profiles and automated processes, all from a single point. High quality MOSFETs ensure precise control and maximum efficiency.
Why choose the Mac Plus from Mastervolt?
- Fast and reliable charging: Thanks to the proven three-step charging algorithm, even a fully discharged battery is quickly put back into service.
- High compatibility: The charger works with all common battery models, including lithium-ion, with CZone, NMEA2000 and MasterBus compatibility.
- Robust and durable: The resistant housing and high-end components guarantee a long service life, even under difficult conditions.
- Intelligent functions: Voltage stabilization, parallel operation and a variety of other functions make the Mac Plus the heart of your electrical circuit.
- Silent operation: Thanks to the fanless design, the Mac Plus is particularly discreet and does not disturb on board.
- Boats: The charger powers your consumers with reliable electricity, regardless of engine speed.
- Camper: Enjoy comfortable power during your trip without having to worry about empty batteries.
- Converted trucks: Optimize the performance of your vehicle's battery and protect the most delicate electronic components.
- Extended battery life: Gentle charging significantly increases the life of your battery.
- Increased operational reliability: Avoid unexpected power outages and protect your electronic devices.
- More comfort: Make the most of all the amenities without having to sacrifice electricity.
Characteristics
| Name | MAC PLUS 12/12-50 CZone | |
| Battery charger features | ||
| Battery temperature sensors | Yes, included | |
| Battery voltage | Yes | |
| General | ||
| Witnesses | Yes, tricolor LED | |
| Communication protocol | MasterBus, CZone, NMEA2000 | |
| Output voltage | 10-15 V | |
| Nominal output voltage | 12 V | |
| Output voltage stabilization | 2% at temperatures, load and input | |
| Output voltage distortion (peak) | Max. 1 % | |
| Max. output power | 725 W | |
| Nominal output power | 675 W | |
| Max. Output current | 50 A | |
| Output charging current (3-step mode) | 50 A | |
| Nominal supply voltage | 12 V | |
| Input voltage range | 10 – 16 V | |
| Maximum input current | 50 A | |
| Galvanic isolation | No | |
| Voltage | Yes | |
| Efficiency | > 95 % (at nominal input voltage, full load); Peak 97 % | |
| Parallel use | Yes | |
| Alarm contact | Yes, via MasterBus | |
| MasterBus power supply | No | |
| Engine running signal input | yes (high active / low active) | |
| Switch | Yes, for basic settings | |
| Dimensions, H x W x D | 255 x 165 x 66 mm 10.0 x 6.5 x 2.6 inches | |
| Weight | 2 kg 4.4 pounds | |
| Approvals | CE, E | |
| Technical details: | ||
| No-load consumption | < 2 mA | |
| Charging characteristics | 3 phases+ | |
| Battery types | wet, Gel, AGM, spiral, Lithium Ion, traction, user-defined | |
| 3-step charging option | Yes (DIP switch settings) | |
| Power consumption (DC side) | < 5 mA | |
| Connectivity | 3 M8 terminations for 10-50 mm² cable, (positive input, positive output, common negative), 8-conductor screw connection for 0.75-1.5 mm² cables (remote on/off control, temperature sensor, voltage measurement) | |
| Temperature range (ambient temp.) | -25°C to 60°C ; decreasing > 40°C -13°F to 140°F | |
| Protection level | IP23 | |
| Protection systems | DC short circuit, overload, overheating, high/low battery voltage, reverse polarity (fuse) | |
| Cooling | Natural | |
| Compatible with MasterBus | Yes | |
| Protection class | IP23 | |
| Scope of delivery | 1 temperature sensor with 6 m cable, 1 master bus termination resistor | |
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Technical specifications
- Ideal solution for on-board electrical systems with smart alternators and start-and-stop systems.
- Compensates for voltage losses due to cable length.
- Protects the service battery and sensitive equipment by stabilizing the charging voltage.
- 3-step charging algorithm for fast and safe charging.
- Integration with CZone, NMEA2000 and Masterbus for centralized control.
- Compatible with different battery types, including lithium-ion.
- Silent operation thanks to its fanless design.
- Intelligent functions including voltage stabilization and parallel operation.
| Name | MAC PLUS 12/12-50 CZone |
| Battery temperature sensors | Yes, included |
| Battery voltage | Yes |
| Witnesses | Yes, tricolor LED |
| Communication protocol | MasterBus, CZone, NMEA2000 |
| Output voltage | 10-15 V |
| Nominal output voltage | 12 V |
| Output voltage stabilization | 2% at temperatures, load and input |
| Output voltage distortion (peak) | Max. 1 % |
| Max. output power | 725 W |
| Nominal output power | 675 W |
| Max. Output current | 50 A |
| Output charge current (3-step mode) | 50 A |
| Nominal supply voltage | 12 V |
| Input voltage range | 10 – 16 V |
| Maximum input current | 50 A |
| Galvanic isolation | No |
| Efficiency | > 95 % (at nominal input voltage, full load); Peak 97 % |
| Parallel use | Yes |
| Alarm contact | Yes, via MasterBus |
| Power supply via MasterBus | No |
| Engine running signal input | yes (high active / low active) |
| Switch | Yes, for basic settings |
| Dimensions (H x W x D) | 255 x 165 x 66 mm (10.0 x 6.5 x 2.6 inches) |
| Weight | 2 kg (4.4 pounds) |
| Approvals | CE, E |
| No-load consumption | < 2 mA |
| Charging characteristics | 3 phases+ |
| Battery types | wet, Gel, AGM, spiral, Lithium Ion, traction, user defined |
| 3-step charging option | Yes (DIP switch settings) |
| Power consumption (DC side) | < 5 mA |
| Connectivity | 3 M8 terminations for 10-50 mm² cable, (positive input, positive output, common negative), 8-conductor screw connection for 0.75-1.5 mm² cables (remote on/off control, temperature sensor, voltage measurement) |
| Temperature range (ambient temp.) | -25°C to 60°C ; decreasing > 40°C (-13°F to 140°F) |
| Protection level | IP23 |
| Protection systems | DC short circuit, overload, overheating, high/low battery voltage, reverse polarity (fuse) |
| Cooling | Natural |
| Compatible with MasterBus | Yes |
| Protection index | IP23 |
| Delivery contents | 1 temperature sensor with 6 m cable, 1 Master bus terminal resistor |














