Alternator Alpha 24 V 150 A EVO s Alpha Pro III

Mastervolt's EVO series is specifically designed for demanding 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 rotational speeds.

This alternator delivers a powerful charging current of 150 Amperes at a voltage of 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 regulator (reference 45513000). This external regulator turns the alternator into a true smart charger by applying an optimized and secure charging cycle for your batteries.

Yes. Paired with the Alpha Pro III regulator, the alternator is fully compatible with Lithium-ion battery banks, as well as conventional technologies such as flooded lead-acid, Gel, and AGM.

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

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

Via the MasterBus connection, the controller 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 of detectable loss).

The Alpha Pro III regulator uses a smart charging algorithm called 3-Step+ which consists of three stages:

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

No, Lithium-ion batteries do not require temperature compensation. However, the temperature sensor is essential for safely and efficiently charging lead-based batteries (flooded, Gel, AGM).

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

Configuration is done easily via the MasterBus network using a compatible display or the MasterAdjust software on your computer. You can select the system voltage and battery type so 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 excitation and ensures safe, efficient, and battery-appropriate charging.

MasterBus connections must be made using standard straight RJ-45 patch cables. When installing, it is important to follow the power distribution rule across the network and never create loops or ring networks.

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

The D+ LED serves as a charge state indicator 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 simplifies troubleshooting.

No, this specific model (reference 48624152) is designed exclusively for battery banks operating on 24V DC. 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 may 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 lights up, first check whether the battery fuse has blown or if the black ground cable (GND) is improperly connected. Also ensure the engine is running, as the absence of voltage at the ignition terminal prevents the regulator from activating.

Mechanical installation requires checking the compatibility of your engine mounts and calculating the correct pulley ratio. 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.