Balmar XT 250A Alternator

Balmar XT-CR-250 High Output Marine Alternator – 12V 250A External Regulated Alternator with Pulley Options

The Balmar XT-CR-250 is a premium high-output 12V marine alternator designed for demanding charging applications in modern marine electrical systems. Delivering up to 250 amps of charging performance, the XT-CR-250 is engineered for lithium, AGM and advanced house battery banks when paired with an external smart regulator such as the Wakespeed WS500 or Balmar MC-618.

Built with heavy-duty marine-grade components, advanced cooling, and high-temperature durability, the XT Series alternators are designed to withstand continuous high-load operation in harsh engine room environments. The XT-CR-250 provides reliable high-capacity charging for cruising yachts, powerboats, commercial vessels and off-grid marine electrical systems.

Key Features:
• High output 250A charging performance
• Designed for external smart regulation (WS500 / MC-618 compatible)
• Optimised for lithium and large capacity house banks
• Advanced cooling and high-temperature operation
• Heavy-duty marine construction with high vibration resistance
• Ideal for continuous duty charging applications

Pulley Options:
The XT-CR-250 alternator is available with multiple pulley configurations to suit different engine setups and belt profiles:

• K6 Serpentine Pulley – Common for modern marine diesel engines
• J10 Serpentine Pulley – High load, multi-rib belt systems
• Dual V-Belt Pulley – Traditional twin belt marine setups
• Custom Pulley Ratios Available – Optimised alternator RPM vs engine speed

Selecting the correct pulley ensures optimal alternator performance, correct charging output and reduced belt wear in high-load installations.

Technical Specifications:
Voltage: 12V
Output: Up to 250A
Regulation: External regulator required
Mount Type: Saddle or Spindle mount variants available
Cooling: High-efficiency internal fan system
Application: High output marine charging systems
Compatibility: Lithium, AGM and lead-acid battery banks (with smart regulation)

Ideal For:
High output marine alternator upgrades, lithium battery charging systems, cruising yachts, offshore powerboats, commercial vessels and advanced Victron or Balmar charging installations.

The Balmar XT-CR-250 provides serious charging performance for modern marine electrical systems, delivering reliable high-amperage output with flexible pulley options to suit a wide range of engine configurations.