Mastervolt Mac Plus 12/24-30 + CZone [81205305]

Mac Plus 12/24-30 + CZone

Boost the Service Battery

Too often, service batteries don’t get the charge they need. This problem is made worse by smart alternators and start/stop systems, which result in slow, insufficient charging. 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 even in 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: 20-30 V
• Nominal Output Voltage: 24 V
• Output Voltage Stabilization: 2 % at extremes of temperatures, load, and input
• Output Voltage Ripple (peak-peak): Max. 1 %
• Max. Output Power: 725 W
• Nominal Output Power: 675 W
• Max. Output Current: 30 A
• Output Charge Current (3-step mode): 30 A
• Nominal Input Voltage: 12 V
• Input Voltage Range: 10-16 V
• Max. Input Current: 50 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 mm², (positive input, positive output, joint negative connection) 8-pole screw connection for cable diameters of 0.75-1.5 mm² (remote on/off, temperature sensor, voltage measurement
• Temperature Range (ambient temp.): -25 degrees C to 60 degrees C; derating > 40
• Cooling: Natural cooling
• Protections: Overload, over temperature, DC short circuit, reversed polarity (fuse)
• MasterBus Compatible: Yes

Why You’ll Love It

• ⚡ Fast and safe charging, even on short runs

• 🔇 Fanless design for silent operation

• 🔋 Compatible with all battery types, including LiFePO4

• 🚤 Engine run detection protects the starter battery

• 🔧 Adjustable current limits meet Euro 5/6 standards

• 💡 Voltage stabilization for sensitive electronics and LED lighting

• 🔗 Parallel operation for over 100 amps charging capacity

• 🌐 CZone®, NMEA 2000®, and MasterBus compatible

• 🧠 Intelligent monitoring and configurable controls

• 🌡️ Temperature and voltage compensation for optimal results

• ✅ E-Mark/R10 certified for mobile and marine use

Technical Specifications

Perfect For

• Marine service and starter battery systems

• RVs, off-grid vehicles, and commercial fleets

• Dual-battery and lithium upgrade installations

• CZone and MasterBus-integrated systems

Why Choose the Mastervolt Mac Plus 12/24-30 + CZone?

✅ Smart, silent, and powerful DC-DC charging
✅ Fully compatible with modern alternators and lithium batteries
✅ Built for the marine environment with unmatched Mastervolt reliability

Warranty

Mastervolt 2-Year Limited Warranty – Covers defects in materials and workmanship for peace of mind on the water.

Owner's Manual (pdf)