Mastervolt ChargeMaster 25A Battery Charger Fully Automatic #:  53098
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Mastervolt ChargeMaster 25A Battery Charger Fully Automatic

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12 Volt 25 Amp fully automatic battery charger. 9.2 x 5.2 x 2.4 inches.
More Details...   #53098
Brand:  Mastervolt
MFG Part#:   44010250
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Mastervolt ChargeMaster 25A Battery Charger Fully Automatic 44010250

Power you can rely on 
  • 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. 
Always on course with Mastervolt…

Mastervolt ensures you an electrical system with no weak links and a dependable and silent power supply. Whether for recreational or professional purposes, with Mastervolt you always have power you can rely on... The power to be independent.

ChargeMaster Battery Chargers

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. 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.

Specifications 12/25-3

General specifications  
Nom. output voltage

12 V

Total charge current

25 A

Number of battery outlets


Charge current second output

25 A

Charge current third output

25 A

Battery capacity range

50-250 Ah

Nom. input voltage

120/230 V (50/60 Hz)

AC connection

2 mtr AC cable

Supplies your system without battery



LED display

Dimensions, hxwxd

234x132x60 mm
9.2 x 5.2 x 2.4 inches


1.8 kg
4.0 pounds




CE, E-mark, ABYC A-31, SAE J1171/ISO 8846 ignition protected

Technical specifications  
Charge characteristic

IUoUo, automatic 3-step+ for gel/AGM/wet/Lithium Ion

Charge voltage Bulk

14.4 V

Charge voltage Absorption

14.25 V

Absorption time

4 hours

Charge voltage Float (wet batteries)

13.25 V

Charge voltage Float (gel/AGM batteries)

13.8 V

Temperature compensation

-30 mV/ °C
-17 mV/ °F

Voltage compensation


Power consumption (DC side)

< 2 mA

Full load consumption (230 V AC)

450 W

Current Control function


Power factor control

≥ 0.98

Temperature range (ambient temp.)

-25 °C to 60 °C, derating > 25 °C
-13 to 140 °F

Protection degree



vario fan

Sound level

< 52 dBA at 1 mtr


over temperature, over load, short circuit, high battery, low battery

MasterBus compatible


CSI/DC alarm

yes, using a Multipurpose Contact Output (code 77030500)


  Mastervolt ChargeMaster 12 25-3 Manual
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Q. Do you offer Free Shipping?
A. We have Free ground shipping via UPS to the Lower 48 States on most orders of $199 or more.

Q. What do we mean by most orders?
A. Some items are exempt from this offer and are indicated on the product page. Exempt items are usually bulky or heavy items such as buoys. Over 98% of the items on qualify for the free shipping offer.

Q. Where do you ship from and What is the delivery time?
A. We ship from Halifax, Nova Scotia. Delivery time will be 3 - 7 business days. Northeast will be 3 - 4 days and Southwest and Pacific coast will be 7 business days. Most other areas are 5 business days.

Q. If my order does not qualify for free shipping what will it cost?
A. To see what your shipping charge (if any) will be you can add the item(s) and quantities to the shopping cart and you will see a shipping cost calculator.

Q. Will I be charged any sales taxes?
A. No. We are located in Canada and we are not required to charge US state sales taxes.

Q. Do I have to pay any customs charges or duties?
A. No. Orders under $800 do not receive any customs charges by US Customs. On Orders over $800 pays the charges - You will not be charged anything for duties or customs brokerage fees.

Money Back Guarantee
Guarantee You may return your purchase to us (with a return authorization number - use this form) within 30 days and we will refund the purchase price of the product. Items which are cut to order (rope, wire etc), software, chart cards and printed materials (paper charts, books) are not returnable.
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