SKU: 89028579379

Mastervolt Mac Plus 12/48-15 [81203205]

Sale price$276.30 Regular price$307.00
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Description

Mastervolt Mac Plus 12/48-15 [81203205]Mac Plus 12 48 15 Boost Your 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 48V and 36V solve that problem. With brand new bi directional technology, the Mac Plus can use each side as an input or output, delivering a reliable and consistent charge to both service and starter batteries.

Mac Plus 12/48-15

Boost Your Service Battery

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 Mac Plus 48V and 36V solve that problem. With brand-new bi-directional technology, the Mac Plus can use each side as an input or output, delivering a reliable and consistent charge to both service and starter batteries.

Proven Mastervolt Quality

The Mac Plus uses the proven Mastervolt 3-step+ charge algorithm, delivering a quick and easy charge, even to completely flat batteries. By knowing when the engine is running and providing charge, you can also be sure that the Mac Plus will never drain your starter battery.

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.

Total Power Flexibility

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. 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 36/48V to 12/24V 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:

  • Bi-directional technology
  • Get either 48V or 36V power from a single unit
  • 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

General Specifications:

  • Battery Voltage Sense: Yes
  • Status indicator: Yes, 3 color double LED
  • Communication protocol: MasterBus, CZone & NMEA 2000
  • Output voltage: 30-60 V DC
  • Nominal output voltage: 36/48 V
  • Output voltage stabilization: 2 % at extremes of temps, load, and input
  • Output voltage ripple (peak-peak): Max. 1 %
  • Max. output power: 900 W
  • Max. output current: 15 A
  • Nominal input voltage: 12 V DC
  • Input voltage range: 8-16 V
  • Max. input current: 60 A
  • Galvanic isolation: No
  • Efficiency: > 95 % (at nom. input voltage, full load); 97 % peak
  • Parallel configuration: Yes, up to 4
  • Alarm contact: Yes, through MasterBus, CZone, DIP Switch, or remote switch
  • Engine run signal input: Yes (active high/active low)
  • DIP switches: Yes, for basic setup
  • Dimensions, hxwxd: 255x165x66 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, ABYC & UKCA

Technical Specifications:

  • Battery types: Gel, AGM, Lithium Ion, user-defined
  • Power consumption: < 5 mA, < 10 mA in CZone, < 1 mA in MasterBus
  • Temperature range (ambient temp.): - 25 °C to 60 °C; derating > 40 °C/104 °F
  • Cooling: Natural cooling
  • Protection degree: IP23
  • Protections: Overload, over-temperature, DC short circuit, reversed polarity (fuse)

Specifications:

  • Charger Input - Voltage: 12v
  • Charger Output - Amps: 15a
  • Charger Output Voltage: 36/48V
  • Box Dimensions: 4"H x 9"W x 15"L WT: 5.6 lbs
  • UPC: 816882023446

Quick Guide (pdf)
Owner's Manual (pdf)
Brochure (pdf)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
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]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 89028579379

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4.5 ★★★★★
Based on 29 reviews
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Verified Purchase
Lakes
Belleville, US
★★★★★ 5
Well made and stylish riser for my sit stand desk.
Color: White, Size: 42.5 Inch
I got this to provide a place to tuck my 49 key Arturia keyboard. The only thing I wish they would offer is a taller leg option by 1 or 2 inches in height. Regardless this thing is a beast and will easily hold a wide screen monitor or dual 27” monitors and space to tuck your laptop underneath on the middle shelf out of the way. I happen to have my monitor on an arm to provide even more usable space on the top. I have a USB switch on the right middle shelf and room for my AirPods on the left with room to spare. My Apple pencils fit perfectly on the tray as well as my iPad. In order to make this work for my application I ended up getting some acrylic cubes and silicone bumpers and pads to raise the height by two inches so my 49 key keyboard would easily fit underneath. It turned out really well for the look I wanted. If the legs were longer I wouldn’t have had to take it this far. The color is pure white and matches my desk color perfectly. It was super easy to put together. It is very solid and has a durable easy to clean finish. All in all I have no regrets making this purchase. It is very functional even without the height modifications that were specific to my needs. I will come back with a photo or two once I get settled in my new place and finish getting my studio set back up.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 3, 2025
N
Verified Purchase
Noah
New York, US
★★★★★ 5
i’m in loveeeeee
Color: White, Size: 42.5 Inch, Color: White, Size: 42.5 Inch
I’m not a person who often writes product review but this time i’ve decided to write one on this dual monitor stand i just got because it is AMAZING. Here’s what I love about it: - Easy to assemble - Smart and sleek design, I must emphasize on this omg it looks so stable - Space-saving Really recommend this for it’s quality and great design, one of my best amazon finds 🫶
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 4, 2026
M
Verified Purchase
Momo
Natrona Heights, US
★★★★★ 5
Saved my neck and my desk space! Solid and stylish
Color: Walnut, Size: 42.5 Inch
I’ve been looking for a way to raise my dual 27-inch monitors, and this Fenge stand is perfect. The 42.5-inch length is exactly what I needed—both monitors fit with room to spare. It’s raised them to the perfect ergonomic height, so no more neck strain! The wood finish looks much more expensive than it actually is, and the storage space underneath is a lifesaver for hiding my docking station and keyboard when I'm done for the day. It feels very sturdy and doesn't bow in the middle at all. If you want a clean, organized desk, this is the way to go.
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Reviewed in the United States on February 9, 2026
T
Verified Purchase
That One Guy
Houston, US
★★★★★ 4
Decent Stand with Lots of Storage Options
Color: Black, Size: 42.5 Inch, Color: Black, Size: 42.5 Inch
Received this stand today and am very pleased. I was able to put it together in about 15 minutes . I had no issues during assembly other than that my box was missing the instructions; luckily they were relatively easy to find online when searching the brand on google. Now for the price range, this is a great bang for your buck as far as monitor stands go. It has nice heavy duty metal legs and the built in phone stand is a nice touch, but I do wish the the stand itself was made of solid wood as it does feel like cheap particle board that may or may not bow over time depending on how much weight you put on it. It's not as cheap feeling as many other stands on Amazon but I do think it would benefit tremendously if it was built with real wood. Because it has (2) shelves, one of the best things about this stand is how many places it has to store items, setup docking stations, laptops, or even small music interfaces including under the bottom shelf. However, I think that the center cubby should've had an opening in the back to allow cords/cables to pass through which would've made this stand even more versatile, the only way around that issue is to drill a hole through the back panel but at least it will be pretty hidden and not visible from the front. All in all, I'm happy with my purchase and think the pros outweigh the cons. It tidied up my desk's overall look, has (2) wide shelves, and overall sleek/modern design all for $100 makes it worth it. I would definitely buy it again but hope they improve on the shelf material, even if it does increase the price slightly.
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Reviewed in the United States on September 12, 2023
T
Verified Purchase
Talon
Birmingham, US
★★★★★ 5
As good as you hope it is!
Color: Walnut, Size: 42.5 Inch
I'm really happy with this stand! It perfectly well made, all the holes line up, the legs are made of metal, it's very sturdy, and the instructions were easy to follow! The stand sits on my desk perfectly flat and the wood print veneer looks good. I would recommend this stand to friends and family without hesitation.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026

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