Renewable Energy Catalog
Battle Born Batteries
Blue Sea Systems
Lithium Battery Co.
Preformed Line Products
Quick Mount PV
Mastervolt Alternators & Charge Regulators
Mastervolt, 45513000, Alpha Pro III
Mastervolt, 45513000, Alpha Pro III
2 to 3 Weeks
Oct 1st - Oct 7th
Out of Stock
Lead Time To Ship May Vary
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.
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.
Product Specifications |
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.
Link to MasterShunt
Connection to Mastervolt alternator
Connection to Bosch alternator
yes, using a Bosch adapter cable (product code 45510500)
Nominal battery voltage
12 V / 24 V
Cable length regulator/alternator
1.5 mtr / 5 ft oil resistant connection cable
Connection plug regulator/alternator
Display/read - out
90 x 109 x 30 mm 3.5 x 4.3 x 1.2 inch
0.4 kg 0.9 lb
battery temperature sensor with 6 m (20 ft) cable
IUoUo, automatic / 3 - step+ for Gel/AGM/flooded/Lithium Ion
Charge voltage Bulk/Absorption/Float
default setting for AGM, Gel and Lithium Ion (adjustable)
4 hours, adjustable from 2 minutes to 12 hours
- 30 mV / C - 17 mV/ F
DC voltage compensation
voltage drop compensation in DC cables up to 3 V
alternators with negative excitation
up to 20 amps
Other Products in This Category
Mastervolt, 48420120, Pulley Multi 6Ribs D=56, 2 W=42, 8 mm
Mastervolt, 48420140, Pulley Multi Groove 8Ribs Frwh D=56 W=38, 9 mm for Alpha Compact
Mastervolt, 48420170, Pulley Multi Groove 8Ribs D=48, 1 W=39, 4 mm for Alpha Compact
Mastervolt, 48420180, Pulley Multi Groove 2x8Ribs D=66, 1 W=68, 7 mm for Alpha Compact
Mastervolt, 48420160, Pulley Multi Groove 8Ribs D=66, 1 W=34, 6 mm for Alpha Compact
Mastervolt, 48420200, Oil Pressure Switch Isolated M10x1
Mastervolt, 48420110, Pulley Multi Groove 6Ribs Frwh D=49.8 W=40.3 mm for Alpha Compact
Mastervolt, 48420100, Pulley Multi Groove 8Ribs Frwh D=57, 4 W=37, 4 mm for Alpha Compact
Mastervolt, 48420130, MASTERVOLT MULTI GROOVE PULLY 55mm
Mastervolt, 48420150, Pulley Multi Groove 8Ribs Frwh D=50 W=49, 3 mm for Alpha Compact