SKU: 88333179738

Mastervolt ChargeMaster Plus 24/20-3 Battery Charger

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Description

Mastervolt ChargeMaster Plus 24/20-3 Battery ChargerChargeMaster Plus 24 20 3 Battery Charger Make the most of your batteries with the ChargeMaster series, plugging in and charging anywhere in the world. Mastervolts ChargeMaster guarantees fast and complete charging of your batteries no matter where you are. Thanks to Mastervolts innovative 3 step+ charging process, batteries also perform better and last longer. All ChargeMasters can be easily connected to a MasterBus network with only one cable and

ChargeMaster Plus 24/20-3 Battery Charger

Make the most of your batteries with the ChargeMaster series, plugging in and charging anywhere in the world. Mastervolt’s ChargeMaster guarantees fast and complete charging of your batteries no matter where you are. Thanks to Mastervolt’s innovative 3-step+ charging process, batteries also perform better and last longer.

All ChargeMasters can be easily connected to a MasterBus network with only one cable and one connection (with the exception of the ChargeMaster 12/10, ChargeMaster 12/15-2, and ChargeMaster 24/6). What’s more, you have the option for central, local, or remote monitoring, configuration, and control of your system.

Clear Display

A clearly lit display on the ChargeMaster provides all essential information: charge current, charge voltage, charge phase, and battery content measurement and/or battery condition measurement as a percentage of available Ah capacity. The display also provides an indication of MasterBus communication. Three buttons adjacent to the read-out panel allow for easy operating of the entire system. 

The ChargeMaster is available in various models to guarantee you the ideal battery charger for any situation and demand.

Features:

  • For recreational and semi-professional use.
  • Suitable for any type of battery, including Lithium-Ion batteries.
  • 3-Step+ charging technology for fast and complete charging also charges depleted batteries.
  • Memory function prevents overcharging in case of unreliable mains.
  • Safe and complete charging due to standard safety features.
  • Charging capacity up to 1000 Ah battery banks.
  • Easy to connect and quick to install.
  • Can charge multiple battery banks simultaneously.
  • Built-in system functionality (MasterBus) in combination with other Mastervolt products.
  • Clear control panel (with the exception of the ChargeMaster 12/10, ChargeMaster 12/15-2, and ChargeMaster 24/6).
  • Supplies your system without a battery.

Charging your batteries with every voltage

The Mastervolt ChargeMaster supplies a maximum capacity wherever you are via auto-ranging. Auto-ranging ensures perfect fully automatic operation anywhere in the world, regardless of the available mains voltage (90-265 V AC, 50 or 60 Hz). The 3-step+ charging technology guarantees fast and complete charging, while the cos phi 1-regulation gets the most out of limited generator capacity.

Robust Connections 

Solid metal-to-metal connectors equipped with strain relief prevent corrosion and overheating.

Charging multiple battery banks

The ChargeMaster series has three equal charge outputs. Those of the smaller ChargeMaster models are pre-installed with two meters of cable for a plug & play solution, while the heavier models have one full output (for example for your service battery) and two outputs of 10 A, ideal for your starter batteries.

DC Power Supply

Even if the batteries are not connected, Mastervolt ChargeMaster battery chargers can provide a constant DC output allowing you to turn on lights or keep the fridge cold.

Specifications:

  • Nominal output voltage: 24 V
  • Total charge current: 20 A at 28.8 V
  • Number of battery outlets: 3
  • Charge current second output: 20 A
  • Charge current third output: 20 A
  • Battery bank size: 40-200 Ah
  • Nominal input voltage: 120/230 V (90-265 V), 50/60 Hz
  • AC connection: Connector strips
  • Power supply mode: Yes
  • Galvanic isolation: Yes
  • Display/read-out: LED display

Specifications:

  • Charger Input - Voltage: 120/230v
  • Charger Output - Amps: 20a
  • Charger Output Voltage: 24v
  • Charging Banks: 3
  • Portable: No
  • Box Dimensions: 6"H x 12"W x 16"L WT: 9 lbs
  • UPC: 816882022890

Owner's Manual (pdf)
Shipping Notes
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Exchange/Return Notes
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SKU: 88333179738

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Carmen Brown
Lexington, US
★★★★★ 5
Lolli
Very good for sugar free
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Reviewed in the United States on September 16, 2025
J
Verified Purchase
JJMP
Grantham, US
★★★★★ 1
Chemical/Artificial tasting!!
Tastes like sweet chemicals! Very disappointing. Would NOT recommend.
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Reviewed in the United States on December 21, 2025
P
Verified Purchase
P
Massapequa, US
★★★★★ 5
Best book for beginners to learn safe practices in single pitch climbing
Format: Paperback
Great book for beginner climbers, especially those who want to set up top ropes. Goes over anchor setup, knots, gear placement, belaying, rappelling, etc. Lots of good photos. Very easy to read, don’t be put off by the description as a “manual”, and worth reading to learn how to do things safely. It’s definitely not just for those who want to guide or take AMGA courses. If you are debating getting this book or “Top roping” by the same author, get this one, as it contains 100% of the content in the other book (much of the exact same text and photos) and more, and is just as easy to read. In fact, this has a ton of overlap (and many of the same photos) with “Climbing Anchors” which the author co-authored, but is more accessible and spans a wider range of content. If you are the “leader” of your beginner climbing friends or even if you have some experience but want to take a beginner climbing outside, this is a must read.
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Reviewed in the United States on September 10, 2020
A
Verified Purchase
Annran
Fort Morgan, US
★★★★★ 5
Perfect reference guide
Format: Paperback
I bought this book to supplement my lessons with an AMGA guide to learn how to set up toprope climbs. I used it many times to practice and reinforce everything I learned. It is really well written and my favorite book in terms of the knowledge contained within. As common sense would dictate this is not a book to teach your how to toprope...it is a reference to what you have learned?
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Reviewed in the United States on May 24, 2015
J
Verified Purchase
Joel Schopp
Bozeman, US
★★★★★ 4
Essential To Read Before the Class
Format: Paperback
This book provides a good overview of what you'll need to know for your AMGA Single Pitch Instructor (SPI) course and assessment. If you plan to take that course this book is a no-brainer. You just have to buy it and read it. There are a few shortcomings: * The photos of how to tie the knots skip a lot and it is impossible to learn the knots from the book. * The photos of what not to do should be clearly labeled with a red cross bar or WRONG overlay on the photo. If you flip causally through the book and look at the photos some very wrong stuff is there and you have to read the text to know that it is not recommended. * The religious debate on anchor systems rages on. Should you set up a Joshua Tree System with Tether or a Backside System? I realize the AMGA doesn't want to pick sides and will say either is acceptable, but the book doesn't even try to discuss the advantages and disadvantages of various anchor systems.
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Reviewed in the United States on October 30, 2015

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