Balmar XT-DF4 alternator KIT -12/24V – 90/170/250A

The Balmar XT-DF4 Alternator Kit provides a heavy-duty, “smart” charging solution for larger marine engines utilizing a 4″ Dual Foot (J-180 style) mounting configuration. By pairing the powerful XT-Series alternator with Balmar’s advanced external regulation, this kit creates a complete charging ecosystem capable of supporting large battery banks and heavy electronic loads on modern cruising vessels.

The Complete Charging System

A high-output alternator requires precise management to reach its full potential without overheating or damaging your batteries. This kit includes all the components necessary for a professional-grade, integrated installation:

• Balmar XT-DF4 High-Output Alternator: Engineered for heavy-duty applications, featuring the braided stator design for maximum output in a compact “small case” J-180 frame.
• MC-618 (12V) or MC-624 (24V) Digital Regulator: The industry-standard for multi-stage regulation. These “smart” controllers manage the alternator’s output to ensure your batteries are charged quickly and safely.
• Alternator & Battery Temperature Sensors: Essential for high-demand systems, these sensors allow the regulator to automatically throttle back output if the alternator gets too hot or if the batteries reach a critical temperature.
• Wiring Harnesses: High-quality, marine-grade harnesses that simplify the connection between the alternator, regulator, and battery bank.

Why Choose the XT-DF4 Kit?

• Heavy-Duty J-180 Mount: The 4″ Dual Foot (J-180) mount is common on larger diesel engines from manufacturers like Cummins, Caterpillar, John Deere, and Detroit Diesel. The XT-DF4 is designed as a direct-fit, high-power upgrade for these engines, providing massive charging capacity without the need for custom brackets.
• Lithium (LiFePO4) Ready: Lithium battery banks can accept high current for long periods, which can lead to alternator overheating. This kit is specifically designed to handle those loads; the included digital regulator features a dedicated Lithium charging profile, and the temperature sensors provide the necessary thermal protection.
• Industry-Leading Idle Output: The XT-Series is renowned for its ability to produce significant power at low engine RPMs. Whether you are maneuvering in a harbor or idling to charge at anchor, the XT-DF4 delivers the current you need to keep your house systems running without having to rev the engine.

Kit Components

• Balmar XT-Series Alternator (90A, 170A, or 250A)
• MC-618 or MC-624 Digital Multi-Stage Regulator
• MC-TS-A Alternator Temperature Sensor
• MC-TS-B Battery Temperature Sensor
• Wiring Harness
• Comprehensive Instruction Manual

Technical Specifications

• Voltage: 12V or 24V
• Amperage Options: 90A (24V), 170A (12V), or 250A (12V)
• Mounting: 4″ Dual Foot (J-180 Style)
• Case Ground
• Internal 14.1V Backup Regulator (SmartReady® technology)
• Pulley Requirement: Must be used with a Serpentine (Multi-Groove) or Dual-Vee belt system.

Installation Tip

• High-output charging systems put substantial mechanical load on your engine belts. To prevent slippage and excessive belt wear, we strongly recommend installing a Balmar AltMount® Serpentine Pulley Conversion Kit alongside this alternator.
• A Tachometer Signal Stabilizer (Part No. 15-TSS) may be required if your current tachometer is not adjustable.

Country of Manufacture: USA

Brand

Balmar

Balmar has been serving the Recreational Marine Industry for over 30 years. We supply DC Charging Products and Battery Monitors to help sailors and power boaters charge and monitor their batteries more efficiently.