Delivery includes an Alpha Pro III charge controller. Fast & full charging of all battery sets. Power supply for all electrical loads. 12 V and 24 V versions. 75 A to 150 A charging current. Comes standard with an Alpha Pro III charge controller for optimal performance and preservation of your battery sets. Using a Battery Mate or charge current distributor, in combination with an Alpha alternator, allows for the simultaneous charging of two or three separate battery sets. TIP: A second alternator on the main engine, in combination with a large battery set and inverter, can serve as an alternative to a generator. For every engine type Equipped with various connections for custom alternator mounts, to be supplied by your installer or engine supplier. Some engine brands offer Mastervolt alternator mounts as an option. Fast charging, even at idle speed Standard alternators only deliver the specified capacity at high RPM. The Mastervolt Alpha alternator is specially designed for a powerful charging process, even at low RPM. Multi-groove pulley The 12/130 and 24/75 models are also available with a multi-groove pulley. Performs excellently even above 40% B0C The forced cooling provided by the pulley’s fan ensures high power output at higher temperatures, even in an enclosed engine compartment.