Mastervolt Alpha Alternator 12/130 Multi-Belt - 48312130

SKU: EX 48312130

1-2 weeks delivery time

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The Mastervolt Alpha 12/130 Multi-Belt Alternator (48312130) delivers a strong 130 A charging current at 12 V and is equipped with a multigroove pulley for enhanced grip and durability in high-load applications. Designed for fast, efficient battery charging at low RPM, it comes standard with the Alpha Pro III regulator and supports multiple battery banks through isolators or Battery Mates. With a six o’clock mounting position, bidirectional rotation, and galvanic isolation, it ensures reliable performance even above 40 °C. Weight: 10.1 kg.

Description
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Mastervolt 48312130 - Alpha Alternator 12/130 Multi-Belt (130A, 12V, Multigroove Pulley, Isolated, With Alpha Pro III)

The Mastervolt Alpha Alternator 12/130 Multi-Belt is optimized for powerful and efficient charging in marine, mobile, and off-grid systems. Featuring a multigroove pulley and an output of 130 A at 12 V, this alternator is engineered to charge both starter and service batteries rapidly — even when engine RPM is low. It includes the advanced Alpha Pro III regulator for extended battery life and precise charge control.

Key Features:

130 A charge current at 12 V for fast battery replenishment
Factory-installed multigroove pulley for improved belt engagement
Alpha Pro III charge regulator included for optimal battery management
Effective charging even at low RPM — ideal for stop/start conditions
Supports simultaneous charging of multiple battery banks
Galvanically isolated for system safety and compatibility
Fan-assisted cooling ensures consistent output in hot engine bays
Six o’clock mounting position and bidirectional rotation support

Applications:

Marine propulsion and house battery systems
Mobile energy systems with large battery banks
Battery-based generator alternatives with inverters

Technical Specifications:

Charge Voltage (Absorption)	14.25 V
Charge Voltage (Float)	13.25 V
Total Charge Current	130 A
Voltage	12 V
Regulator	Alpha Pro III (included)
Rotational Direction	Bidirectional
Belt Section	2xA (Multigroove pulley)
Nominal Pulley Diameter	89 mm (3.5 in)
Mounting Position	Six o'clock
Weight	10.1 kg (22.3 lb)
Isolated Operation	Yes

Installation Notes:

This alternator is suitable for all engine types and allows easy bracket adaptation thanks to its universal mounting fixations. Mastervolt or engine-supplier brackets may be required depending on your installation. When used with a Battery Mate or battery isolator, the Alpha alternator can charge up to three separate battery banks simultaneously. It also offers a silent, generator-free alternative when paired with a large battery bank and inverter.