Alternator Alpha Compact 28/150, regulator Alpha Pro III w zestawie

The packaging includes:

Alpha Compact 28/150 alternator (supplied without pulley)Alpha Pro III smart charge regulatorOil-resistant cable harness (1.5 m)Battery temperature sensor

This high-performance alternator delivers a nominal current of 150 A at 24V (at 6000 RPM), corresponding to an electrical power output of 3.6 kW (the required mechanical power being 8.4 kW). It can provide 28 A as early as 1800 RPM.

Yes, absolutely. Thanks to the included Alpha Pro III regulator, the charge is perfectly suited to all battery types, including lithium-ion batteries, as well as open lead, gel, and AGM models.

No, this alternator is supplied without a pulley. The pulley must be selected based on your engine's specifications (power, crankshaft pulley diameter, and desired reduction ratio).

The Alpha Pro III regulator converts the alternator into a smart charger. It provides 3-stage+ charging (Bulk, Absorption, Float), compensates voltage based on battery temperature, and protects the system by reducing power in case of overheating.

Unlike standard models, the Alpha Compact series is equipped with a highly efficient dual internal fan. This allows it to maintain optimal performance with an operating temperature that can reach 120 °C.

The alternator requires a starting speed of 1700 RPM to begin charging, and it can withstand a maximum rotation speed of up to 16,000 RPM.

Yes, the Alpha Pro III regulator is natively compatible with the MasterBus network. It is equipped with two RJ-45 data ports, enabling seamless communication with other devices in your electrical installation.

The alternator stands out with an exceptional power-to-weight ratio, weighing only 7.9 kg.

The regulator continuously monitors temperature. If the alternator reaches 85 °C, the regulator linearly reduces charging power. If the temperature rises to 120 °C, it cuts off charging completely to prevent any damage.

Yes, for lead-acid batteries (Gel, AGM, flooded), it is strongly recommended to install the included temperature sensor. It adjusts the charging voltage and prevents thermal overload. Note that this sensor is not required for lithium-ion batteries.

No, the Alpha Compact 28/150 model is exclusively designed for 24V DC service battery banks. For a 12V system, you must choose a model from the 14V range.

This specific model is designed for mounting on a gimbal arm, which is a very common standard on many marine engines.

By default, this model is not galvanically isolated. However, if your installation requires isolated mounting (for example on an aluminum hull), insulating bushings (optional kit) can be used during installation.

The alternator is equipped with:

Two M8 positive output terminals A W signal connection (tachometer) A Mastervolt plug for the field current An RJ12 port to connect the temperature probe

Absolutely. By connecting the charge controller and the MasterShunt to the same MasterBus network, the charge controller will adjust its charging voltage based on the actual voltage measured at the battery terminals, compensating for voltage losses in the cables.

If the alternator demands excessive torque and causes the belt to slip, you can enable the Power Curve function via the MasterAdjust interface. This reduces the charging current and minimizes mechanical load on the engine.

The Alpha Compact 28/150 alternator is designed to operate with a clockwise rotation direction.

The LED indicator flashes on the regulator serve as alarm indicators. For example, 3 short flashes every 2 seconds indicate that the field current is too high, while 2 flashes indicate a battery voltage that is too high.

The regulator automatically adjusts the charging voltage based on battery temperature. For a 24V bank, the compensation is -60 mV per degree Celsius (calculated from -30 mV/°C for 12V), ensuring safe charging and extending battery life.