Alternator Alpha Compact 28/110

This is a high-performance alternator designed for marine environments. It delivers 110A at 24V to ensure rapid and continuous charging of service and starting battery banks, even in high-temperature engine rooms.

This model operates on 24V DC and provides an output current of 110 amperes (110A).

The Alpha Pro regulator applies a precise 3-stage charging algorithm. This is essential to maximize performance and lifespan of your battery banks, whether they are lead-acid or lithium-ion.

Yes, when paired with the Alpha Pro charge regulator, this alternator is fully suitable for charging Lithium-Ion (Li-ion) battery banks as well as lead-acid batteries.

The Alpha Compact 28/110 alternator requires clockwise rotation (the direction of the clock hands) when viewed from the pulley side.

The clockwise rotation direction is strict because it ensures the proper operation of the internal cooling fans. Incorrect rotation would lead to overheating and failure of the alternator.

No, this specific model is supplied as standard without a pulley. You will need to add a compatible pulley (6 or 8 ribs, standard or with a clutch) depending on your mechanical installation.

A ribbed (or multi-rib) belt with the 'PK' profile, suitable for a multi-groove pulley, is recommended. The belt must be capable of handling the alternator's total mechanical load.

No, the Alpha Compact 28/110 is supplied as standard non-isolated, meaning the ground (negative pole) is connected to the metal housing of the device.

For an isolated installation (often required to protect sensitive onboard electronics from the engine), you must use the optional insulating bushing kit offered by Mastervolt.

The part number for the insulating bushings kit compatible with the Alpha Compact 28/110 is 48420242.

Using insulating sleeves reduces the diameter of the alternator mounting holes. For example, an M12 hole will be reduced to M10, and an M10 hole will be reduced to M8 when installed on the mounting bracket.

The Alpha Compact 28/110 alternator weighs 7.4 kg.

Yes, it can be installed as a second alternator dedicated exclusively to charging the service battery bank, in addition to your engine’s main alternator.

No, Mastervolt does not supply a mounting bracket. You must use your engine’s pre-installed bracket (PTO option), a replacement kit suitable for your engine, or have a custom bracket fabricated by a qualified professional.

Unlike standard alternators, which are often heat-limited, the Alpha Compact series is designed to maintain optimal mechanical and electrical efficiency even at full load and high temperatures.

Yes, Mastervolt offers multi-groove pulleys compatible with this model, available in standard or clutch (freewheel pulley) versions depending on your installation requirements.

The alternator draws power from your engine to generate electricity. As a rule of thumb, the total mechanical-to-electrical conversion efficiency is around 50%. Ensure the engine has sufficient power reserve to drive the alternator at its rated speed.

Yes, the Alpha Compact 28/110 is specifically designed to run continuously in demanding environments and high temperatures found in boat engine rooms without performance loss.