ARCO Marine Zeus A275L Alternator, 1-2" Mount, 12V, High Output with Regulator

Engineered for exceptional power output and reliability, the ARCO Marine Zeus A275L alternator is designed for demanding marine, RV, military, and commercial applications. This high-output 12V alternator rapidly charges large battery banks and maintains optimal performance even at idle speeds. Its advanced cooling design, featuring heat-shedding coatings, an exterior rectifier, and dual cooling fans, ensures it runs significantly cooler than traditional alternators. Proudly Made in the U.S.A. and SAE J1171 Certified, the Zeus A275L delivers the dependable power your systems demand. Upgrade your vessel's power system with confidence.

• ARCO Marine Zeus A275L Alternator with Regulator
• M17 x 1.5 x 24mm Nut
• 18mm ID x 29mm OD Washer
• 49K6 (6-groove, 49mm) Standard Pulley

• High Power Output: Delivers up to 311 Amps (cold) at 9,000 RPM and a sustained 198 Amps at idle (hot, 3,000 RPM) to keep your battery banks fully charged.
• Superior Cooling Performance: Runs 8-20% cooler than competing alternators thanks to advanced heat-shedding E-Coat/Cerakote coatings, an externally mounted rectifier, and dual cooling fans.
• Robust Construction: Features a large 138mm stator, 16 rotor poles, and 50A rated avalanche diodes for extreme durability.
• Optimized Idle Performance: Specifically engineered to produce high amperage output even at low engine RPMs, reducing reliance on a generator.
• Versatile Regulation: Internally regulated with an adaptor for optional external regulation, offering flexibility for various battery charging systems.
• Built for Durability: With a maximum continuous operating temperature of 110°C (230°F), it's built to withstand harsh environments.
• Certifications: SAE J1171 Certified for ignition protection and proudly Made in the U.S.A.
• Lightweight Design: Weighs only 14.9 lbs (6.7 kg), minimizing additional load on your engine.

• Mounting: Replaces most domestic-style alternators using a single 1" or 2" mounting foot (e.g., Motorola, Prestolite).
• Recommended Pairing: Achieve maximum performance by using with an ARCO Zeus Bluetooth alternator regulator or optimized for lithium battery charging systems.