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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4.3 ★★★★★
Based on 12 reviews
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Verified Purchase
Desiree Flores
Belleville, US
★★★★★ 5
Buena tela
Color: Grey, Size: 10-11 Years
Tela suave
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 10, 2025
M
Matt B.
Port Orchard, US
★★★★★ 5
Comfortable, relaxed fit semi-dress suit that fits true to size. Don't round up or down in size.
This suit fits true to size. We got the 9-10 size in white/tan for our above average height 7 year old, and the suit was just a little big (te Amazon algorithm recommended 9-10 based on past purchases and timing. He is the large side of his 2nd grade class, despite being one of the youngest, so I would say this suit would start fitting an average 8.5-9 year old boy. The fabric is a relaxed summer fabric, so good for semi-dress relaxed events. Our tan suit (and from the weathered gray/blue/green images, I assume all of the suits) seems like a casual menswear commercial shoot. The fabric isn't scratchy and our son said it is comfortable. It includes the picket flower, but I didn't think much of that plastic bloom.
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Reviewed in the United States on November 10, 2025
M
Momoftons
San Leandro, US
★★★★★ 5
Really cute suit for my son. Worth the price.
Color: Grey, Size: 10-11 Years, Color: Grey, Size: 10-11 Years
My son says he likes the color. He is 10 and we ordered the size 10 to 11 however he’s on the smaller side for 10 and he definitely has some room to grow so it will last us a while and it looks a little baggy on them for right now. However, the fabric is good quality. We like that it comes with a pocket square built-in and also the boutonniere for fancy occasions. I think this would be great for a wedding party or other occasions where you’d need more inexpensive but matching suits. Fabric quality reflects the price. The material is ok, but not gonna be an heirloom that’s passed down or anything. In the picture, he had shoved it into his clothes drawers and so it’s all wrinkled, but it actually does look great when it isn’t wrinkly. He’s been wearing this every week to Church on Sunday.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 22, 2025
A
A Person
Waukegan, US
★★★★★ 5
Good quality suit for kids
Color: Grey, Size: 10-11 Years, Color: Grey, Size: 10-11 Years
Comfortable, good-quality cotton/linen blend suit for kids. The suit is lined and he was excited that it has an inner pocket for a pen. I believe the suit fits true to size. In the photo I'm attaching, the suit is too large. I'll explain. We ordered a size 10-11 years, but my son is 9 years old. The suit size is actually a 150 (cm). My 9 year old son is currently 55 inches tall and weighs #61. His height of 55 inches translates to 140 cm - which explains why this is a little big/roomy on him. The product page has a size chart which translates the sizing in years (e.g. 9-10 years) into centimeters. If you measure your child before your order it will help you know what size to order. We haven’t ironed ours yet but plan to iron it when he's ready to wear it. We thought about exchanging it for the next size smaller but it's fall right now and this suit will be better for him in the spring/summer. We were pleased to see that this is a “normal” looking suit. Some of the dressy or fashionable clothes have some quirky or unusual elements to them. All in all, we’re pleased with this suit.
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Reviewed in the United States on September 20, 2025
A
Verified Purchase
Amazon Customer
Boise, US
★★★★★ 5
Summer wedding kids suit
Color: Navy, Size: 10 Years, Color: Navy, Size: 10 Years
Bought this suit for my son in the 10 youth size and honestly was pleasantly surprised by the quality for the price. The navy color looks sharp and dressy without being too stiff or uncomfortable. The material has a little stretch, which helped it fit nicely and made it comfortable for him to move around in. The adjustable waist was a huge plus, especially for growing kids. It fit true to size overall, though the blazer sleeves were slightly long on my son. The pants had a nice slim look without being too tight. We paired it with white sneakers for a more modern look and it came out adorable. This would be perfect for weddings, graduations, concerts, communion, school events, or family photos. Overall, very happy with the purchase and would definitely buy again.
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Reviewed in the United States on May 18, 2026

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