• Description
  • Why Buy From Us

ChargeMaster Battery Charger - 12 Amp - 3 Bank - 24V

Power You Can Rely On

Make the most of your batteries with the ChargeMaster, plugging in and charging anywhere in the world. Mastervolt’s ChargeMaster guarantees fast and complete charging of your batteries no matter where you are. The ChargeMaster can charge multiple battery banks simultaneously thanks to its combined functionality. Moreover, all ChargeMasters can be easily connected to a MasterBus network with only one cable and one connection (not available on ChargeMaster 24/6). You also have the option of central, local or remote monitoring, configuration and control of your system. The ChargeMaster is available in various models to guarantee you the ideal battery charger for any situation and demand.

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. 

Sturdy Connections 

Metal-on-metal fitting gives a firm connection, and prevents corrosion or overheating of contact surfaces.

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.

Features:

  • 3-Step+ charging technology for fast and complete charging.
  • Safe and complete charging due to standard safety features.
  • Memory function prevents overcharging in case of an unstable power supply.
  • Clear control panel.
  • Easy to install.
  • Built-in system functionality (MasterBus) in combination with other Mastervolt products (not available on ChargeMaster 24/6).

General Specifications

  • Nominal output voltage: 24 V 
  • Total charge current:12 A 
  • Number of battery outlets: 3 
  • Charge current second output: 12 A 
  • Charge current third output:12 A 
  • Battery capacity range: 24-120 Ah 
  • Nominal input voltage: 120/230 V (90-265 V), 50/60 Hz
  • AC connection: 2M AC cable
  • Power supply mode: yes
  • Display/read-out: LED display
  • Fastening: 4x screw
  • Dimensions, H x W x D: 234 x 132 x 60 mm / 9.2 x 5.2 x 2.4 inch
  • Weight: 1.8 kg / 4.0 lb
  • Approvals:CE, ABYC A-31, SAE J1171/ISO8846 ignition protected

Technical Specifications

  • Charge characteristic: IUoUo, automatic / 3-step+ for gel/AGM/wet/Lithium Ion
  • Charge voltage Bulk: 28.8 V
  • Charge voltage Absorption: 28.5 V
  • Absorption time: 4 hours
  • Charge voltage Float (wet batteries): 26.5 V
  • Charge voltage Float (gel/AGM batteries): 27.6 V
  • Temperature compensation: -60 mV/ °C -33 mV/ °F
  • Voltage compensation: automatic
  • Power consumption (DC side): < 2 mA
  • Full load consumption (230 V AC): 435 W
  • Current Control function: no
  • Power factor control: ≥ 0.98
  • Temperature range (ambient temp.): -25 °C to 60 °C, derating > 25 °C -13 °F to 140 °F
  • Sound level: < 52 dBA at 1M
  • Protection degree: IP23
  • Protections: over temperature, over load, short circuit, high/low battery voltage
  • Cooling: vario fan
  • MasterBus compatible: yes

WarningWARNING: 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.

Specifications:

  • Charger Output Voltage: 24v
  • Charger Output - Amps: 12a
  • Charging Banks: 3
  • Portable: No
  • Charger Input - Voltage: 120/230v
  • Box Dimensions: 5"H x 7"W x 11"L WT: 4.65 lbs
  • UPC: 816882020100

Owner's Manual (pdf)
Brochure (pdf)

Why Choose Green Vista Living


At Green Vista Living, we’re passionate about providing top-quality renewable energy and eco-friendly products that not only enhance your life but also help protect the planet. We’ve built our business with one mission in mind: to be the go-to destination for renewable energy solutions, outdoor gear, and off-grid supplies. When you shop with us, you’re not just getting innovative products—you’re joining a community that’s committed to sustainability.

We Put Our Customers First


As a small, dedicated team, we care deeply about your experience. Unlike large, faceless online companies, Green Vista Living offers a personal touch in everything we do. We're here for you from start to finish—whether you need product advice, support after a purchase, or just have questions. Our knowledgeable customer service team is always just a phone call or email away, ready to assist you in any way possible.

We Share Your Passion for the Planet


Our love for the outdoors and sustainable living runs deep. Most of our team hails from the mountains of Colorado, where renewable energy and the environment are part of daily life. So when you call Green Vista Living, you’ll speak directly with an expert who understands both the technical side of renewable products and the lifestyle they support. Whether you’re looking for solar generators, EV chargers, or any of our eco-friendly offerings, you can trust us to guide you with expertise and passion.

Trusted Industry Experts


Our close partnerships with the best brands in renewable energy and outdoor gear give us insider knowledge that you won’t find anywhere else. We’ve taken the time to carefully select products that stand out for their quality and reliability. At Green Vista Living, we believe in understanding our products inside and out so that we can help you make the right choice with confidence.

More Reasons to Love Green Vista Living


Price Match Guarantee: Thanks to our partnerships, we offer the best prices around. If you find a better deal, we’ll refund the difference.


Free Shipping: We offer free shipping on most orders to the lower 48 U.S. states, making your shopping experience even easier.


100% Secure Ordering: Our site uses SSL Encryption technology to keep your payment and personal information safe and secure.


Volume Discounts: For large orders, we’re happy to provide special pricing—just reach out for a custom quote.


Authorized Dealer: As an authorized dealer for all our brands, you’ll receive full manufacturer warranties with every order.


At Green Vista Living, we aim to make your renewable energy and outdoor experience as seamless and enjoyable as possible. With our unmatched customer service, expertise, and dedication to quality, you can shop with confidence, knowing you’re supporting a company that’s as committed to the planet as you are.

Frequently Asked Questions

Yes! We provide free and fast shipping on MOST orders within the continental United States. However, some specific brands and items will require a quote. You can live chat or call us for a quote
Most orders ship out within 1–2 business days and arrive within 3–5 business days depending on your location.
We offer easy returns as long as your item meets the conditions outlined in our Return Policy. Items must be unused, in original packaging, and returned within the specified return window.
Absolutely! Our in-house product experts are here to help. Live chat or call us 513-743-829 for personalized advice before or after your purchase.
Yes. All products include any applicable manufacturer warranties, and we’ll help you handle any warranty claims if needed.
Yes, we only sell 100% authentic, brand-new products, sourced directly from our manufacturers or authorized distributors.
REAL REVIEWS, REAL RESULTS

Feedback From Our Customers

At Green Vista Living, we pride ourselves on delivering top-quality products and exceptional service to solar professionals and homeowners alike. Here's what our customers have to say about their experiences with us.

Kevin Leary
May 18, 2025
★★★★★

Incredible Tech Support from Anees of Green Vista Living. Exceptional service and went above and beyond on every question.

Bryan Cunningham
Off grid Kit • Dec 21, 2025
★★★★★

Shipment was slow due to high demand, but the team kept me informed and ensured everything arrived properly.

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