Mastervolt Alpha Pro III 45513000 Advanced 3-Step Alternator Regulator for Efficient Battery Charging

Alpha Pro III

Advanced 3-step charge regulator for standard and high performance alternators

The propulsion engine of your boat or vehicles may be used to quickly charge your service batteries, either while cruising or taking a break. The advanced and powerful Alpha Pro III ensures fast and safe charging, protecting both the engine and the batteries. Building on 10 years of experience, the Alpha Pro III features a modernized look, higher power and improved ease of use.

The Alpha Pro III measures the temperature and the voltage of your batteries to prevent overcharging, keeping them in perfect condition. It also monitors the engine load, thus reducing sound variations, wear and tear. The smart keep alive feature solves a common problem causing unreliable tachometer readings. Via MasterBus, it communicates RPM, alternator status and charge status to create intelligent power systems.

Pull the max out of your alternator

The alternator that comes with the engine is not optimally suited for charging service batteries. Designed for low cost and short charge cycles, it charges at a slow pace and is easily overheated. Replacing the standard regulator* with the Alpha Pro III optimizes this charging process, protects against overheating and overcharging and extends the lifetime of your batteries.

(* not allowed on Euro 5/6 engines)

Super charge your system

For superfast charging at low RPM, Mastervolt recommends to combine the Alpha Pro III with a high performance alternator such as the reputable Alpha series. With 20 amps of field current capability, the Alpha Pro is the only 3-step regulator in the market capable of controlling alternators with outputs up to 400 A!

Alpha Pro III: Fast charging, anytime, anywhere.

Features:

• Transforms every alternator into a full temperature controlled 3-step charger.
• Reduces run time, saves fuel, reduces noise and emissions.
• Protects from overcharging and extends battery life.
• Balances engine load, reducing RPM variations.
• Compatible with standard and high performance alternators, incl. 200 A 400 A models.
• Integrated keep alive feature for reliable tachometer readings.
• Suitable for every battery type, including Lithium Ion.
• Suitable for 12 V and 24 V system voltages.
• Masterbus compatible: simplifies wiring, saves space and weight, and creates optimal cooperation between Mastervolt products.

Applications:

Applications range from improving the performance of a standard alternator in a vehicle or boat, to generator replacement, when combined with a high performance alternator.

WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.

The Mastervolt Alpha Pro III (Part Number: 45513000) is a high-performance 3-step charge regulator designed to optimize the charging process of standard and high-performance alternators in boats and vehicles. Built on over a decade of expertise, this advanced regulator features a modern design and increased power capacity, making it an essential component for ensuring fast, safe, and efficient battery charging. The device intelligently monitors battery temperature and voltage to prevent overcharging, thereby extending battery life and maintaining optimal performance. It also tracks engine load to minimize RPM fluctuations, reducing wear and noise, which enhances overall engine longevity and operational smoothness. The smart keep-alive feature addresses common issues with tachometer readings, providing reliable data for better system management. The Alpha Pro III communicates via MasterBus, sharing critical information such as RPM, alternator status, and charge condition, enabling the creation of integrated, intelligent power systems that are easy to wire and space-efficient. This regulator is compatible with both 12V and 24V systems, supporting a variety of battery types including Lithium Ion, and can control alternators with output capacities up to 400A, making it suitable for a wide range of applications from standard vehicle setups to large marine systems. By replacing the standard regulator, the Alpha Pro III enhances alternator performance, reduces overheating risks, and prevents overcharging, thereby prolonging battery life and improving overall system efficiency. Its ability to transform any alternator into a temperature-controlled, full 3-step charger makes it a versatile and valuable upgrade for demanding power systems. Whether used to improve vehicle battery performance or as a generator replacement in marine environments, the Alpha Pro III ensures rapid and reliable charging, helping you get the most out of your power source with minimal maintenance and maximum safety.

Features:

• Transforms every alternator into a full temperature controlled 3-step charger

• Reduces run time, saves fuel, reduces noise and emissions

• Protects batteries from overcharging and extends their lifespan

• Balances engine load, reducing RPM fluctuations

• Compatible with standard and high performance alternators, including models up to 400A

• Integrated keep alive feature for reliable tachometer readings

• Suitable for all battery types, including Lithium Ion

• Supports 12V and 24V system voltages

• MasterBus compatible for simplified wiring and system integration