Too often, service batteries don’t 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 Mastervolt Mac Plus 12/24-30 12V 30A Czone DC to DC Converter (81205305) from Nomadic Supply Company solves this problem, providing a quick, safe, and consistent charge to your service battery. And, by knowing when the engine is running and providing charge, you can be sure that the Mac Plus will never drain your starter battery.
Get peace of mind, knowing that you’ve got the best on board. Using the proven Mastervolt 3-step+ charge algorithm, the Mac Plus delivers a quick and easy charge, even to completely flat batteries.
A robust design holds up in even the harshest conditions, with battery temperature-optimized charging and 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.
With a wide DC input range, the Mac Plus allows 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. And 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. And 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.
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.
Mastervolt Mac Plus 12/24-30 12V 30A Czone DC to DC Converter (81205305) 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 compatible, with 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
Mastervolt Mac Plus 12/24-30 12V 30A Czone DC to DC Converter (81205305) Specifications:
| 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 | 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, 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 |
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to