SKU: 21421897736

Mastervolt ChargeMaster Plus 24/20-3 Battery Charger [44320205]

Sale price$403.65 Regular price$448.50
Save 10%

Pay in installments of $112.12 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 19 - Jul 24

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Mastervolt ChargeMaster Plus 24/20-3 Battery Charger [44320205]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. 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
  • 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: 21421897736

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.2 ★★★★★
Based on 18 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
B
Verified Purchase
Brandon Utter
Natrona Heights, US
★★★★★ 5
Great watch, buy it!
Color: Big Dial Gold Men Watch
I tested all the negative feedback comments and didn’t find any of them to be accurate. This is a great watch with a beautiful dial. End of story.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 11, 2025
B
Verified Purchase
Blake M.
Draper, US
★★★★★ 4
BLING BLING 💎
Color: Big Dial Gold White Men Watch
It's not the GREATEST quality. But if you look at it from a foot or two away, it looks good! BLING BLING!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 7, 2025
A
Verified Purchase
Amoo
Alexandria, US
★★★★★ 5
It got the job done.
Color: Big Dial Gold White Men Watch, Color: Big Dial Gold White Men Watch
Needed it for my son’s 8th grade dance. It was nice for costume jewelry.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 20, 2026
A
Verified Purchase
Amazon Customer
New York, US
★★★★★ 5
Great watch
Color: Big Dial Gold Green Men Watch
This watch is so nice in person!, pictures don't do it justice . Great color and good quality for the price!! I definitely recommend !
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2026
J
Verified Purchase
Joe Cool
Waukegan, US
★★★★★ 1
Beautiful Watch, But It Doesn't Work and Customer Support is Non-Existent
Color: Sliver Band Blue Face-5009, Color: Sliver Band Blue Face-5009
Update: However, after two weeks I noticed the watch would stop working. I would reset the time and it would work for a day or two and stop again. It happened several times. I tried contacting the seller through Amazon twice but they never replied. The phone number listed by Amazon's Contact the Seller doesn't work. I tried calling it twice and all I got was a message saying that my call could not be connected. I contacted Amazon and they authorized a return and now I'm going to have to find a different watch from a different Amazon seller. I'm extremely disappointed because I really loved this watch! I can not in good conscience ever recommend this brand of watches so I changed my review form a 5 star to a 1 star. Previous review: The model I purchased is the OLEVS Stainless Steel Quartz Movement model # 5009G with the blue face. I chose this watch because I have a 9" wrist and this particular model came with a 9.05" band and it fits perfectly! It opens just big enough to slip over my XXL hand the band is just loose enough to have the slightest shift back and forth when closed so it is quite comfortable to wear. The watch is truly beautiful, and light weight. I can't believe how low the price was! My eyesight is not the best so I don't need a fancy watch with three different dials on the face (truthfully I didn't really need the date on this watch since I can't read it without glasses) but I can glance down at the watch and tell the time, and that's all I need. The watch came with the band extended to its longest length, but a tool was included to adjust the band to a smaller size if needed. This manufacturer has many, beautiful watches to choose from! But be careful if band length is a special concern for you. Make certain when you select the color and design you want to scroll down to "Looking for specific info" and ask what the band length is. I found it can vary between the different watches shown on the order page you're viewing. Some watches will have a band length listed in millimeters and others in inches, so you may need to do some conversions. The watch looks very similar to a Citizen watch I've been wearing for at least 15 years (probably closer to 20). The Citizen had been eating $5 batteries every two months for years, and it still lost time like crazy. I finally decided enough was enough and started looking for a nice watch. This is for everyday, and formal wear.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 15, 2024

recommand products