Alternator Alpha Compact 28/110 VP

The Alpha Compact 28/110 VP alternator from Mastervolt is designed to quickly and efficiently recharge your marine battery bank. It delivers a nominal current of 110 A, making it ideal for demanding marine environments.

No, this alternator is supplied without the Alpha Pro III charge regulator. However, this regulator is essential for optimal voltage management and safe battery charging.

This model is specifically designed for electrical installations operating on a 24V DC network.

The Alpha Compact 28/110 VP alternator is specifically designed to perfectly fit Volvo Penta marine engines, thanks to its mounting system on the stern drive arm.

It delivers a current of 110 A at 24 V (approximately 3 kW) and requires an input power of 6.2 kW (8.3 hp), enabling very fast charging of large-capacity battery banks.

Yes, the Alpha Compact series features a patented magnetic design and dual cooling fans. It can thus operate safely up to a maximum temperature of 120 °C.

Despite its high performance, this alternator remains very compact and weighs just 7.4 kg.

The generation speed (or engagement speed) of this model is 1400 RPM. At this RPM, it starts producing power to recharge your batteries.

The Alpha Compact 28/110 VP alternator can withstand a maximum rotational speed of up to 15,000 RPM.

Cooling is actively managed by a dual integrated fan, ensuring optimal heat dissipation even in confined spaces.

The temperature sensor is directly integrated into the alternator. Connection is very simple via an RJ12 connector, which allows it to be linked to the charge regulator for seamless communication with the electrical system.

To ensure safe power transfer compliant with marine standards, the alternator is equipped with two M8-format positive output terminals.

No, this alternator model is not galvanically isolated. This must be taken into account when designing your marine electrical circuit.

The W signal, used for the tachometer, is easily retrieved via a quick connection using an insulated terminal provided for this purpose on the alternator.

The Alpha Compact 28/110 VP alternator is designed to rotate clockwise.

This specific model for Volvo Penta engines uses a gimbal arm mounting (saddle mount), providing robust and vibration-resistant support suitable for marine conditions.

The induced current (field current) connection is made via a dedicated Mastervolt connector, ensuring reliable connection with the regulator.

If an isolated mounting is required, you must use insulating sleeves (reference kit 48420242) to insert on each side of the mounting holes, and add a terminal lug for the ground cable between one of the sleeves and the alternator.

An abnormal noise often comes from a mechanical issue related to the belt. It is recommended to:

Check the alignment of the pulleys.Inspect the tension of the belt.Check the condition of the idler pulley.

It is perfectly normal for the charging current to decrease slightly when hot (up to 15 % less) to protect internal components. Conversely, when cold, the charging current can be up to 20 % higher than the nominal value.