Alternators & Charge Regulators

The existing alternator on the main engine is designed to charge the starter battery. As a result the combination is not ideal for fast and full charging of other batteries, especially if you want to charge the batteries over a short time or when powering a heavy load.

There are two options to solve this issue:

Equip the standard alternator with a Mastervolt Alpha Pro charge regulator. This charge regulator maximises the output of alternators by regulating the alternator in a way that ensures that batteries receive the optimum charge. The proven 3-step+ charge method guarantees fast and safe charging of your batteries.

You can also choose a powerful second Mastervolt Alpha alternator with Alpha Pro charge regulator. This combination was specifically designed for charging service batteries, and allows you to charge quickly and turn off your engine when you want. 

Alpha Pro charge regulators

• 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.

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.

Alpha alternator series

• Fast & complete charging of starter and service batteries.
• Power supply for all consumers.
• 12 V and 24 V versions.
• 75 A to 150 A charge current.
• Standard delivered with Alpha Pro MB charge regulator for an optimal performance and longer-lasting batteries.

Using a Battery Mate or battery isolator in conjunction with an Alpha alternator makes it possible to easily charge two or three separate battery sets simultaneously.