Alpha Compact 14/140 VP Alternator with Alpha Pro III

This kit includes the Alpha Compact 14/140 VP alternator, the Alpha Pro III smart charge regulator, a standard pulley for 8-rib multi-groove belt (48.1 mm diameter), a hydrocarbon-resistant wiring harness, and a battery temperature sensor.

This model is specifically designed to fit Volvo Penta marine engines. It uses a swivel arm mounting system adapted to these engines.

The Alpha Compact 14/140 VP alternator requires a power take-off (PTO) of approximately 4.8 kW from your engine to operate at its rated capacity.

Yes, absolutely. Thanks to the included Alpha Pro III regulator, the alternator is fully compatible with Lithium-Ion batteries, as well as lead-acid, gel, and AGM batteries.

No, this model is not galvanically isolated by default. However, if your installation requires strict galvanic isolation (to prevent electrolysis, for example), an insulating bushing kit is available as an option.

The Alpha Pro III regulator converts the alternator into a three-stage smart charger (Bulk, Absorption, Float). It automatically adjusts the charging voltage based on temperature to protect your battery bank effectively.

The alternator is cooled by an optimized dual-fan system. This allows it to maintain high performance and operate safely up to a temperature of 120 °C.

The Alpha Compact 14/140 VP delivers a nominal current of 140 A and is designed to charge battery banks operating under a 12 V system voltage.

Yes. The included Alpha Pro III regulator is fully compatible with the MasterBus network via its two RJ-45 ports. This allows complete system monitoring (temperature, current, alarms) from a compatible display.

The Alpha Compact 14/140 VP alternator weighs 6.7 kg, making it a relatively lightweight and compact unit for its power output.

The alternator is supplied ready for use with a standard pulley for 8-rib multi-groove belt, with a diameter of 48.1 mm.

The intended rotation direction for this alternator is clockwise (the direction of the clock hands), when viewed from the pulley side.

The included sensor measures battery temperature and sends the data to the charge controller. It automatically adjusts charging voltage (-30 mV/°C at 12 V) to prevent overcharging and extend battery life.

No, the 14/140 VP model is designed exclusively for 12 V systems. For a 24 V system, choose models from the 28/xx series (such as the 28/110 or 28/150).

For wiring distances up to 3 meters, a 50 mm² cross-section is recommended. For distances between 3 and 5 meters, a 70 mm² cable is advised to minimize voltage drop.

The regulator manages numerous safety alarms, including: excessive temperature of the alternator or battery, battery voltage too high or too low, and abnormal excitation current (too high or too low).

The power connection for the positive terminal is made securely via two M8 studs (2x M8) located at the rear of the alternator.

The alternator begins to reduce its charging current (load shedding) when its internal temperature reaches 100 °C. If it reaches 120 °C, it stops charging completely to protect itself.

Yes, via the MasterBus network, the Alpha Pro III can retrieve precise temperature and voltage data directly measured by the MasterShunt, further optimizing the charging cycle.

Slipping reduces the battery charge. You must check the belt tension. If the issue persists, you can enable the "Power Curve" option in the MasterBus settings of the regulator to reduce the initial load and minimize the mechanical torque demanded from the engine.