The Mastervolt Alpha Pro III Charge Regulator is an advanced 3-step charge regulator for standard and high-performance alternators. Using the propulsion from the engine, this advanced and powerful regulator ensures fast and safe charging, while protecting both the engine and the batteries. The Alpha Pro III, combined with the alternator sensor, 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. Building on 10 years of experience, the Alpha Pro III features a modernized look, higher power and improved ease of use.

• Transforms every alternator into a full temperature controlled 3-step charger.
• Reduces run time, saves fuel, reduces noise and emissions.
• Integrated ‘keep alive’ feature for reliable tachometer readings.
• Protects from overcharging and extends battery life.
• Temperature sensor protects systems using Alpha Pro and non-Mastervolt alternators.
• Suitable for 12 V and 24 V system voltages.
• Item #904552 includes XL Cable (4m/13.2ft).