SKU: 42658794248

Mastervolt Mac Plus 12/ 24-30 Converter

Sale price$405.62 Regular price$450.69
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Description

Mastervolt Mac Plus 12/ 24-30 ConverterMac Plus 12 24 30 Converter Charging the service batteries on board of a vehicle or vessel can be challenging. Recharging tends to take a long time and batteries may not receive a full charge. This is a common problem found in boats, service vans, campers and trucks. Smart alternators and start stop systems make the problem even worse. Robust DC DC charger guarantees optimal condition of your service battery Traditionally, a service battery is linked

Mac Plus 12/24-30 Converter

Charging the service batteries on board of a vehicle or vessel can be challenging. Recharging tends to take a long time and batteries may not receive a full charge. This is a common problem found in boats, service vans, campers and trucks. Smart alternators and start/stop systems make the problem even worse.

Robust DC-DC charger guarantees optimal condition of your service battery

Traditionally, a service battery is linked to the starter battery by means of a charge relay. The starter battery is located close to the alternator and receives most of the charge current. However, the service battery is usually further away. Long cables cause voltage drop, leading to slow charging, resulting in failing appliances and premature failure of the battery.

Modern, fuel efficient engines are equipped with smart alternators, following regulations such as Euro 5 and Euro 6. Instead of a constant output, smart alternators provide a variable voltage; after a brief charging period, voltage is reduced and the charging stops. Furthermore, the energy produced by regenerative braking leads to voltage peaks. Service batteries coupled in the traditional way will receive hardly any charge and may be damaged by these peak voltages.

To solve these issues, Mastervolt introduces the Mac Plus DC-DC chargers, available in 12 V or 24 V. The Mac Plus monitors the service battery and compensates the voltage loss. The proven 3-step charge method ensures a quick and safe charge. Moreover, by stabilizing the charge voltage, Mac Plus protects your service battery and sensitive equipment.

The Mac Plus is your battery’s best friend. It monitors your service battery and makes sure it’s always fully charged, maximising the lifetime of your battery. 

Features:

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

Applications

Boost charge voltage when service battery is located further from charging source or in systems with a smart alternator. When a stable power supply or different system voltage is needed. 

Euro 5/6 solution

Charging service batteries in Euro 5/6 applications?
The Mac Plus provides constant power to the service battery, even when the alternator is inactive. 

Parallel operation

The parallel configuration of several units will provide you over 100 amperes. Advanced high-frequency technology with modern microprocessors ensures minimum power loss when switching from 24 to 12 V and vice versa. 

WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.


Manufacturer Part Numbers: 81205300
Owner's Manual (PDF)
GRP:WRO
Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 42658794248

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Parrot 64
Houston, US
★★★★★ 4
Good color, but expensive
Style: Cartridge Ink
Frankly, as with other printers, I thought that I could use reconditioned cartridges with this printer. The first set I purchased was not recognized, thus I have had to purchase genuine products. The cartridges, also offering good color, do not last long. It's a trade-off between cost and quality. If you have to go to Staples from dire need, be sure to price match, for Amazon is $1 less than Staples. Staples will match Amazon. Overall, I try to buy from Amazon.
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Reviewed in the United States on September 10, 2020
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Connie
Charlottesville, US
★★★★★ 5
Big Print Outs Look Great With Epson Ink
Style: Cartridge Ink
So I paint and I'd been trying to find a way to print out large pics to aid me when I'm trying to get my shading correct. This ink is fabulous...the printer just does a great job. First I print one in color and the second in greyscale...it helps a great deal when working with the shading. Epson can even add a couple other color cartridges to get different effects. I'm very happy with Epson inks. They really made a good selection of colors to make prints look amazing. 5 stars
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Reviewed in the United States on March 9, 2024
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PAUL C. Laincz
Los Angeles, US
★★★★★ 5
Never fail.
Style: Cartridge Ink
Only way to go with xp 15000.
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Reviewed in the United States on July 7, 2025
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Amazon Customer
Natrona Heights, US
★★★★★ 5
Great Color
Size: 1 Count (Pack of 1), Style: Cartridge Ink
I was hesitant on purchasing this item. My skepticism was relieved when I installed and printed the first picture...very good quality. However, seems like the ink supply went quickly, either not a complete cartridge or I print too much(which I don't).
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Reviewed in the United States on April 22, 2026
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Carolina
Birmingham, US
★★★★★ 5
Good quality
Size: 1 Count (Pack of 1), Style: Cartridge Ink
I would say great value, but I can buy it for the same price in store. I think it’s more of convenience to be able to get it without having to go out.
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Reviewed in the United States on April 28, 2026

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