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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4.1 ★★★★★
Based on 2251 reviews
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Product Reviews
A
Verified Purchase
Amazon Customer
Fort Morgan, US
★★★★★ 1
Good looks that betray a flawed locking mechanism
Style: Charging MagSafe Mount
I wanted to love the Spigen TapLock—its sleek design and promise of a secure, easy-to-use latch mechanism had me hopeful. At first, it felt solid, and the concept of a spin-to-lock system was clever. But after just a few weeks, the latch mechanism started failing. It wouldn’t adhere properly anymore, and the spin-to-lock feature became completely non-functional—no amount of spinning tightens the lock. Fixing it? Near impossible. The design buries the mechanism in a way that makes repairs a nightmare, and there’s no clear way to realign or replace parts without breaking it further. It’s a shame because the build quality isn’t terrible otherwise, but this critical flaw tanks it. One star—looks good, works briefly, then betrays you. The charge speed is pretty good.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 6, 2025
M
Verified Purchase
mrnyknicks
Alexandria, US
★★★★★ 5
Good product
Style: Charging MagSafe Mount
Great product. It allows my iPhone 15 pro to sit at the right angle so that it is not completely behind steering wheel. I like that it doesn’t use a glue base to secure to monitor. I have taken It off 3 times and it went back on well. The only negative I can find is that it’s a little bouncy or I should say more than I would like it to. I would recommend to a friend.
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Reviewed in the United States on February 12, 2025
D
Verified Purchase
D. Miller
Omaha, US
★★★★★ 3
So so. Could be great with few improvements
Style: Charging MagSafe Mount
Overall, this mount is decent with good functionality and quality but a few things (short permanently affixed wire, no way to stow/hide, fixed arm length) make it annoyingly fall short of great. (Phone S24+, TPU case, ESR "magsafe" metal ring sticker) GREAT: Arm rotation (i.e. portrait/left to landscape/top) is super easy with one hand via a simple push of a button that clicks into position every 45 degrees. Great design unique to this model. Most others require a cumbersome loosening and retightening mechanism that is difficult with one hand and tedious to position where wanted. GOOD: Build quality. Secure and reliable attachment to screen without adhesive. Reliable wireless charging. Pad swivel/tilt is easy while staying tight and secure without any nut/screw to loosen. Includes attractive velcro (for carpet) and adhesive (for plastic) wire routing clips. SOSO: Magnet could be stronger to support phones (like mine) with a simple metal ring vs a fully magnetized magsafe insert - still holds strong enough while driving tho. No way to stow/hide the mount when not in use - no folding hinge - the pad bumps against the display when rotating down, so it won't rotate behind - no folding hinge either. Arm length not adjustable - my S24+ is positioned nicely as-is but larger phones may cover the Tesla display and smaller phones may be too far away from it. BAD: Wire too short to completely hide behind dash and under floor mat. Made worse by a permanently attached wire at the mount. Would be much better if attached via usbc, so it could be replaced with longer wire. NOTE: If a screen protector is installed on the Tesla display, this will cause it to bubble around the clamped edges.
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Reviewed in the United States on December 23, 2024
D
Verified Purchase
Daveworx
Phoenix, US
★★★★★ 4
Very well designed mount but loosens over time
Style: Charging MagSafe Mount
Works amazing but over time the mount loosens up and the phone sags or rotates on its own. There is no way to tighten it more - only the part that connects to the Tesla display.
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Reviewed in the United States on November 8, 2025
D
Verified Purchase
David Modoski
Waukegan, US
★★★★★ 5
Great phone mount for Tesla.
Style: Charging MagSafe Mount
Firstly, I love that it is fastened to display via a turn knob. The previous product I had was attached by adhesive and in the summer it would fall off. Which is the reason I purchased this product. I also love the ability to adjust the arm so mount the phone whichever way you'd like.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 28, 2025

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