Mastervolt Mac Plus 24/12-50 + CZone 50A 24V to 12V DC-DC Battery Charger, 81205205

Mac Plus 24/12-50 + CZone

Boost the Service Battery

Too often, service batteries dont get the charge they need. This is a problem made worse by smart alternators and start/stop systems, which result in slow and insufficient charges. The Mac Plus DC-DC charger solves this problem, providing a quick, safe, and consistent charge to the service battery. And, by knowing when the engine is running and providing charge, users can be sure that the Mac Plus will never drain a starter battery.

Proven Mastervolt Quality

Users get peace of mind knowing that they have the best on board. Using the proven Mastervolt 3-step+ charge algorithm, the Mac Plus delivers a quick and easy charge, even for completely flat batteries.

A robust design holds up in even the harshest conditions, with battery temperature-optimized charging and a high-quality aluminum housing to ensure superior protection against dust and water ingress. The power-efficient design also allows the Mac Plus to operate silently and without a fan.

Total Power Flexibility

With a wide DC input range, the Mac Plus allows for all DC sources and can charge two batteries from a single alternator or charger. It supports a full range of chemistries and battery types, including lithium. It also functions seamlessly with modern alternators such as Euro 5 and 6, ensuring proper charging by providing constant power, even when the alternator is inactive.

Parallel configuration of up to ten units will provide over 100 amperes. Advanced high-frequency technology with modern microprocessors ensures minimal power loss when switching from 12V to 24V and vice versa.

Analog voltage sense ports are also available to compensate for voltage drops and maintain proper charging.

Superior Monitoring Control

Compatibility with CZone, NMEA 2000, and MasterBus delivers truly superior monitoring and control and ensures Mac Plus integrates easily into complete systems. Achieve the best performance possible via various controllers and high-quality MOSFETs. And configure the Mac Plus with ease via MasterAdjust, the CZone configuration tool, or even via the on-board DIP switches.

Features:

• Fast and safe charging, even during short trips
• Fanless design for silent operation
• Suitable for flooded, Gel, AGM, and Li-Ion batteries (incl. LiFePO4)
• Even charges fully depleted batteries
• Engine run detection protects the starter battery
• Adjustable current limits to meet Euro 5/6 requirements
• Voltage stabilization protects sensitive equipment, lights, and loads
• Parallel operation to obtain charging capacities well over 100 Amps
• MasterBus, CZone, and NMEA 2000 are compatible for intelligent system monitoring and automation
• Temperature compensation and voltage sense for an optimal charging result
• E-Mark/R10 certification for mobile applications
• Power supply mode offers stable power for sensitive loads
• Heavy-duty connections for easy installation and quick setup via DIP switches

Specifications:

• 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: 10-15 V
• Nominal Output Voltage: 12 V
• Output Voltage Stabilization: 2 % at extremes of temperatures, load, and input
• Output Voltage Ripple (peak-peak): Max. 1 %
• Max. Output Power: 750 W
• Nominal Output Power: 710 W
• Max. Output Current: 50 A
• Output Charge Current (3-step mode): 50 A
• Nominal Input Voltage: 24 V
• Input Voltage Range: 19-30 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, H x W x D: 255 x 165 x 66 mm (10.0 x 6.5 x 2.6 inch)
• Weight: 2 kg (4.4 lb)
• Compliance: CE, E-Mark, SAE J1171 ISO 8846 Ignition Protected

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 degrees C to 60 degrees C; derating > 40
• Cooling: Natural cooling
• Protection Degree: IP23
• Protections: Overload, over temperature, DC short circuit, reversed polarity (fuse)
• MasterBus Compatible: Yes

Mastervolt Mac Plus 24/12-50 + CZone is a 50-amp DC-DC battery charger designed to provide fast, consistent charging for 12-volt service batteries from a 24-volt input source. It is well suited for marine, mobile, and other onboard power systems where smart alternators, start/stop technology, or short trips can prevent service batteries from receiving a sufficient charge.

Using Mastervolt’s 3-step+ charging algorithm, the Mac Plus can charge flooded, Gel, AGM, spiral, lithium-ion, traction, and user-defined battery types, including LiFePO4. Engine-run detection helps prevent the unit from draining the starter battery, while adjustable current limits support modern Euro 5 and Euro 6 alternator systems. The charger can also provide stable output power for sensitive equipment, lighting, and other DC loads.

The fanless, naturally cooled design operates quietly and uses a durable aluminum housing for protection against dust and water ingress. Battery temperature compensation and voltage sensing help maintain the intended charging performance, while voltage stabilization supports connected equipment during changing input, load, and temperature conditions. Up to ten units can be configured in parallel for charging capacities exceeding 100 amps.

For integrated system monitoring and control, the Mastervolt Mac Plus supports MasterBus, CZone, and NMEA 2000. Basic setup is available through onboard DIP switches, with configuration support through MasterAdjust and CZone tools. Heavy-duty M8 terminals and screw connections support installation in compatible DC power systems.

Key Features:

• 50-amp DC-DC charging from a 24-volt nominal input to a 12-volt nominal output
• Supports flooded, Gel, AGM, spiral, lithium-ion, traction, and user-defined battery types, including LiFePO4
• Fanless natural cooling provides quiet operation
• Engine-run detection helps protect the starter battery from unwanted discharge
• MasterBus, CZone, and NMEA 2000 compatibility enables system monitoring and control
• Parallel configuration supports charging capacities exceeding 100 amps

Product Details:

• Brand: Mastervolt
• Model: Mac Plus 24/12-50 + CZone
• Part Number: 81205205
• Nominal input voltage: 24 volts; input range: 19–30 volts
• Nominal output voltage: 12 volts; output range: 10–15 volts
• Maximum output current: 50 amps
• Maximum output power: 750 watts; nominal output power: 710 watts
• Communication protocols: MasterBus, CZone, and NMEA 2000
• Battery temperature sensor: Included
• Battery voltage sensing: Yes
• Engine-run signal input: Active high or active low
• Cooling: Natural cooling
• Protection degree: IP23
• Compliance: CE, E-Mark, SAE J1171, and ISO 8846 Ignition Protected
• Weight: 4.4 pounds

Choose the Mastervolt Mac Plus 24/12-50 + CZone for dependable 24-volt to 12-volt service-battery charging and seamless integration with modern onboard power systems.

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