ARCO Marine Zeus A275L Alternator, 311 Amp High Output, 1-2" Single Foot Mount

Experience superior, reliable power generation with the ARCO Marine Zeus A275L alternator, engineered for exceptional output and durability in demanding marine, RV, military, and commercial applications. This high-output alternator runs significantly cooler than competitors, ensuring increased performance and longevity, while rapidly charging large battery banks, even at idle speeds. Proudly made in the U.S.A. and SAE J1171 certified, the Zeus A275L is a robust solution designed to meet your most rigorous power needs. Upgrade your system today for unparalleled electrical performance.

In the Box:

• ARCO Marine Zeus A275L Alternator Unit
• Terminal Block
• P-Type Harness
• Pulley Hardware (M17 x 1.5 x 24mm nut, w/ 18mm ID x 29mm OD washer)

Key Benefits & Specifications:

• High Output Performance: Delivers a maximum output of 311 Amps (Cold, 9,000 RPM), with sustained cruising output of 227 Amps (Hot, 6,000 RPM) and 198 Amps (Hot, 3,000 RPM), ensuring ample power for all your onboard systems.
• Superior Cooling: Runs 8-20% cooler than incumbent alternators due to heat-shedding coatings, an exterior-located rectifier, dual cooling fans, and OEM components, extending lifespan and maintaining consistent output.
• Optimized for Idle Speeds: Engineered for high performance even at low RPMs, efficiently charging large battery banks without the constant need for a generator.
• Robust Construction: Features E-Coat/Cerakote finish for enhanced durability and heat absorption reduction.
• Certifications: SAE J1171 Certified for ignition protection, ensuring safe operation in marine environments.
• Regulation: External Only regulation, coming with a terminal block and P-Type harness, designed for use with an external regulator.
• Lightweight Design: Weighs only 14.9 lbs (6.7 kg), making installation manageable without compromising strength.
• Voltage: 12V system with a default output voltage of 14.1V.
• Max Continuous Operating Temperature: Rated for up to 110°C / 230°F, ensuring reliable operation under challenging conditions.

Compatibility & Pairings:

• Mounting Application: Replaces most domestic alternator styles using a single 1” or 2” mounting foot, including models by Motorola and Prestolite.
• Recommended Pairing: Achieve maximum performance and charging efficiency by pairing with an ARCO Zeus Bluetooth alternator regulator or lithium battery charging system.