Mastervolt 45513000-WH Alpha Pro III Harness

Mastervolt Wiring Harness for Alpha Pro III Charge Regulator

The Mastervolt 45513000-WH is a heavy-duty, marine-grade pre-wired installation wiring harness engineered specifically for the Mastervolt Alpha Pro III 3-stage charge regulator. Designed to streamline the integration between high-output Alternators (Mastervolt Alpha series or third-party high-power alternators like Balmar) and the Alpha Pro III regulator, this harness provides error-free plug-and-play wiring for marine and commercial engine room installations.

The kit includes color-coded, oil- and heat-resistant marine tinned copper cabling fitted with an overmolded multi-pin connector plug, pre-terminated terminal lugs, an inline fuse holder with fuse, and an external battery temperature sensor. This ensures precise 3-stage+ temperature-compensated alternator charging while protecting the alternator stator, field coils, and house/starter battery banks against over-charging, thermal runaway, and wiring faults.

Key Features

• Plug-and-Play Integration: Overmolded connector matches the Alpha Pro III multi-pin socket directly, eliminating custom wiring mistakes during installation.

• Integrated Battery Temperature Sensor: Includes a dedicated thermal probe for real-time temperature-compensated battery charging profiles.

• Marine-Grade Flame/Oil Resistant Cabling: Constructed using tinned copper conductors insulated with high-temperature, flame-retardant marine PVC.

• In-Line Circuit Protection: Includes integrated waterproof fuse holder with correct amperage fuse to protect field current and regulation circuitry.

Specifications