Alternator Alpha 24 V 150 A EVO z Alpha Pro III

The Mastervolt EVO series is specifically designed for harsh marine environments. Unlike standard automotive models, it can operate continuously in engine rooms with high temperatures (performance maintained above 40 °C) while delivering very high output power, even at low RPM.

This alternator delivers a powerful charging current of 150 Amperes at 24 Volts. This high capacity enables ultra-fast recharging of your house battery bank, ensuring excellent efficiency even when your boat's engine is idling.

Yes, this kit includes the advanced Alpha Pro III charge controller (reference 45513000). This external controller turns the alternator into a true smart charger by applying an optimized and secure charging cycle for your batteries.

Absolutely. Paired with the Alpha Pro III regulator, the alternator is fully compatible with lithium-ion battery banks, as well as classic technologies such as flooded lead-acid, gel, and AGM.

The system is supplied with a battery temperature sensor. Connected to the Alpha Pro III controller, it dynamically adjusts the charging voltage based on battery heat (thermal compensation at -30 mV/°C for 12V, doubled for 24V), thus preventing overheating and extending battery bank lifespan.

Yes, integration is done via the Alpha Pro III controller, which has two RJ-45 data ports. This allows native connectivity to the MasterBus ecosystem for monitoring, configuration, and communication with other Mastervolt equipment onboard.

Thanks to the MasterBus connection, the regulator can communicate directly with a MasterShunt installed as close as possible to the battery. It detects the actual voltage at the battery terminals and automatically compensates for voltage drops in the wiring (up to 2.5 V detectable loss).

The Alpha Pro III regulator uses an intelligent charging algorithm called 3-Step+ which consists of three phases:

Bulk: Fast charge at maximum current.
Absorption: Constant-voltage charge to complete the fill (adjustable duration from 0 to 10 hours).
Float (Maintenance): Voltage maintenance to keep batteries at 100% capacity without overcharging.

No, lithium-ion batteries do not require temperature compensation. However, the temperature probe provided is essential for safely and efficiently charging lead-based batteries (flooded lead-acid, gel, AGM).

An N-type alternator (negative excitation) means the regulator controls the alternator's magnetic field by modulating the ground connection (negative pole), while the positive pole is permanently powered. The Alpha Pro III is specifically designed to drive this type of technology.

Configuration is performed easily via the MasterBus network using a compatible display or the MasterAdjust software on a computer. You can select the system voltage and battery type so that the algorithm automatically adapts to your bank specifications.

No, this high-performance alternator is designed to operate exclusively with an external regulator such as the Alpha Pro III. It is the regulator that manages the alternator's excitation and ensures safe, efficient, and battery-appropriate charging.

MasterBus connections must be made using standard straight RJ-45 patch cables. During installation, it is critical to follow the power distribution rule across the network and never create a loop or ring network.

The Alpha 24V 150A EVO alternator assembly weighs approximately 13.1 kg. It is a robust piece of equipment, manufactured with high-quality components to withstand the vibrations and extreme temperatures found in marine engine rooms.

The D+ indicator serves as a charge status and diagnostic alert. For example, it will flash 3 short times every 2 seconds if the field current is too high, or 2 times if the battery voltage is excessive, which greatly facilitates troubleshooting.

No, this specific model (reference 48624152) is designed exclusively for 24V DC battery banks. Mastervolt offers other alternator models in the Alpha range for vessels equipped with 12V systems.

For a 24V system with lead-acid batteries by default, the Bulk/Absorption voltage is 28.5 V (i.e., 14.25 V x 2) and the Float voltage is 26.5 V (i.e., 13.25 V x 2) at a reference temperature of 25°C. These values remain fully configurable.

This alternator delivers a very high charging current (150A), so batteries can overheat. If your batteries are regularly exposed to ambient temperatures above 30°C, it is strongly recommended to install a forced-air ventilation system or relocate them to a cooler area.

If no LED indicator is lit, first check whether the battery fuse has blown or if the black ground cable (GND) is poorly connected. Also ensure the engine is running, as a lack of voltage at the ignition terminal prevents the regulator from activating.

The mechanical installation requires checking the compatibility of your engine mounts and calculating the correct pulley ratio. You must ensure the pulley diameter allows the alternator to rotate at an optimal speed to generate power at idle, without exceeding its maximum rotational speed at full throttle.