ChargeMaster 12/15-2

Product Highlights

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.
  • Easy to install.
  • Built-in system functionality (MasterBus) in combination with other Mastervolt products.


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.

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 metres 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.


General specifications

Nominal output voltage12 V
Total charge current15 A
Number of battery outlets2
Charge current second output15 A
Battery capacity range30-150 Ah
Nominal input voltage230 V (180-265 V), 50/60 Hz
AC connectioncable + plug
Supplies your system without batteryno
Display/read-out1 LED
Dimensions, hxwxd206 x 121 x 50 mm
Weight1 kg
ApprovalsCE, ABYC A-31

Technical specifications

Charge characteristicIUoUo, automatic 3-step+ for gel/AGM/wet/Lithium Ion
Charge voltage Bulk14,25 V
Charge voltage Absorption14,25 V
Absorption time6 hours
Charge voltage Float (wet batteries)13,25 V
Charge voltage Float (gel/AGM batteries)13,8 V
Temperature compensation-30 mV/ °C
Voltage compensationautomatic
Power consumption (DC side)< 1 mA
Full load consumption (230 V AC)250 W
Current Control functionno
Power factor control> 0,95
Temperature range (ambient temp.)-25 °C bis 60 °C, derating > 40 °C
Sound level< 52 dBA at 1 mtr
Protection degreeIP21
CSI/DC alarmno
Protectionsover temperature, over load, short circuit, high/low battery voltage
Coolingvario fan
MasterBus compatibleno

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