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Mastervolt ChargeMaster 24/12-3
Cat. No. MV-44020120
Weight 4 lbs

Install Mastervolt ChargeMaster and rest assured that your batteries are always quickly and completely charged, whether you are at home, on the road or at sea with low shore power or limited supply.

Mastervoltís 3-step+ charging method guarantees optimum efficiency, meaning your batteries will perform better and last much longer. Its direct current outlet is so clean that the battery charger itself can be used as direct power source, even without a battery.

The high frequency switch mode technology, in which advanced microprocessors combine a myriad of functions, causes an extremely accurate charge characteristic. Furthermore, this battery charger has a unique memory function which prevents the charger starting a new 3-step charge cycle if the supply voltage is interrupted. The model is equipped with an LED status indicator displaying the stage of the 3-step charge cycle while several remote panels are available as option for even more convenience.

With MasterBus, Mastervolt is taking the next step forward in implementing system intelligence, reducing wiring, simplifying installations, improving flexibility for everyone. Be it the installer, yard, service personal or the end customer.

All in all it gives you the power to be independent


 General specifications  
  Nominal output voltage

24 V

  Total charge current

12 A

  Number of battery outlets


  Charge current third output

12 A

  Charge current second output

12 A

  Battery capacity range

24-120 Ah

  Nominal input voltage

120/230 V (50/60 Hz)

  AC connection

2 mtr AC cable

  Supplies your system without battery



LED display

  Dimensions, hxwxd

9,21 x 5,20 x 2,36 inches


3,97 pounds


4x screw


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

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

-104.8 mV/ °F

  Voltage compensation


  Power consumption (DC side)

< 2 mA

  Full load consumption (230 V AC)

435 W

  With automatic circuit breakers
  Current Control function


  Power factor control

? 0.98

  Temperature range (ambient temp.)

-13 to 140 °F


vario fan

  Sound level

< 52 dBA at 1 mtr

  Protection degree



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

  MasterBus compatible


  CSI/DC alarm

yes, using a Multipurpose Contact Output (code 77030500)

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