Mastervolt Alpha Pro II MasterBus Charge Regulator

The charge regulator measures the battery temperature and adjusts the charging process accordingly, resulting in a safe and fast charge. Therefore the battery is always kept in good condition.

- Suitable for 12 and 24 V.
- Including plug & play connection cable, an adapter cable for Bosch alternators is optional.
- The Alpha Pro series is suitable for most alternators with a charging current of up to 400 amps.
- Automatic voltage and temperature compensation.
- ‘Keep alive’ function for tachometer.
- MasterBus compatible.

Alpha Pro: Easy to operate:
- Easy operation LEDs on the body of the charge regulator indicate the charge phase. The Alpha Pro is designed as a ‘fit all’ solution. Just one unit is needed for both 12 and 24 V applications, with a simple selector switch to set the regulator to the right voltage. The charge regulator can also be used on any other brand of alternator that has a standard Bosch connector, using a Bosch adapter cable (optional; product code 45510500).

MasterBus connectivity:
- The Alpha Pro is compatible with MasterBus, allowing easy monitoring via a MasterView touchscreen. In a MasterBus system the voltage drop over the battery cable and the battery temperature is compensated automatically.

Benefits of a Mastervolt charge regulator:
- The Alpha Pro charge regulator maximises the output of Mastervolt Alpha alternators or any other alternator by regulating the alternator in a way that the batteries receive the optimum charge. The proven 3-step+ charge method used by all Mastervolt battery chargers guarantees fast and safe charging of your batteries.
- The Alpha Pro helps to cut emissions by requiring less run time because it maximises the power from any alternator. A battery can be charged quickly even at very low RPM, especially when connected to an Alpha series alternator. By connecting the Alpha Alternator to a Battery Mate or battery isolator, several battery banks can be charged simultaneously.
- Does your tachometer sometimes indicate zero while the engine is running? The ‘keep alive’ function of the Alpha Pro gets rid of this problem for ever.


General specifications:

- Link to MasterShunt: yes
- Connection to Mastervolt alternator: yes
- Connection to Bosch alternator: yes, using a Bosch adapter cable (product code 45510500)
- Nominal battery voltage: 12 V / 24 V
- Cable length regulator/alternator: 1.5 mtr oil resistant connection cable
- Connection plug regulator/alternator: Alpha/Mastervolt
- Cooling: fanless
- MasterBus powering: yes
- Display/read-out: LED display
- Dimensions, hxwxd: 90 x 109 x 30 mm 3.5 x 4.3 x 1.2 inch
- Weight: 0.4 kg 0.9 lb
- Delivered with: accutemperatuursensor met 6 mtr (20 ft) kabel
- Approvals: CE

Technical specifications:
- Charge characteristic: IUoUo, automatic / 3-step+ for gel/AGM/wet/Lithium Ion
- Charge voltage Bulk/Absorption/Float: default setting for AGM, Gel and Lithium Ion (adjustable)
- Absorption time: 4 hours, adjustable from 2 minutes to 12 hours
- Temperature compensation: -30 mV / °C -17 mV/ °F
- DC voltage compensation: voltage drop compensation in DC cables up to 3 V
- Alternator type: alternators with negative excitation
- Field currents: to 10 Ampère
- MasterBus compatible: yes

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