Mastervolt ChargeMaster 12/25-3 Charger


SKU: MAS-44010250 Category:


Mastervolt ChargeMaster 12/25-3 Charger – 44010250

The Mastervolt ChargeMaster 12/25-3 marine battery charger can connect to MasterBus, for a fully integrated battery management system.

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.

General Specifications

Nominal output voltage12 V
Total charge current25 A at 13.25 V
Number of battery outputs3
Charge current second output25 A
Charge current third output25 A
Battery capacity range50-250 Ah
Nominal input voltage120/230 V (90-265 V), 50/60 Hz
AC connection2m (6ft) AC cable
Power supply modeYes
Display/read-outLED display
Fastening4x screw
Dimensions, HxWxD234 x 132 x 60 mm
9.2 x 5.2 x 2.4 inch
Weight1.8 kg
4.0 lb
ApprovalsCE, ABYC A-31, SAE J1171/ISO 8846 ignition protected, RRR

Technical specifications

Charge characteristicIUoUo, automatic 3-step+ for Gel/AGM/wet/Lithium Ion
Charge voltage Bulk14.4 V
Charge voltage Absorption14.25 V
Absorption time4 hours
Charge voltage Float (wet batteries)13.25 V
Charge voltage Float (Gel/AGM batteries)13.8 V
Temperature compensationYes
DC voltage compensationAutomatic
Power consumption (DC side)< 2 mA
Full load consumption (230 V AC)450 W
Current Control functionNo
Power factor control≥ 0.98
Temperature range (ambient temp.)-25 °C to 60 °C, derating < 0 °C and > 40 °C -13 °F to 140 °F
CoolingVariable fan
Protection degreeIP23
ProtectionsOver temperature, over load, short circuit, high/low battery voltage
MasterBus compatibleYes

Additional information

Weight14 lbs
Dimensions16 × 12 × 10 in
Device Type

Battery Charger






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