Alternators Alpha Compact 14/140 VP ar 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, it is. 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 optional accessory.

The Alpha Pro III regulator turns 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 features optimized cooling thanks to a dual integrated fan. 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-rib belt, with a diameter of 48.1 mm.

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

The included sensor measures the battery temperature and transmits the data to the charge controller. The controller automatically adjusts the 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 controller 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).

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

The alternator begins to reduce its charging current (load reduction) when its internal temperature reaches 100 °C. If it reaches 120 °C, it stops charging entirely 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 battery charge. You must check belt tension. If the issue persists, you can enable the "Power Curve" option in the MasterBus regulator settings to reduce initial load and minimize mechanical torque demanded from the engine.