ARCO Marine Zeus A275L 12V Single Foot Alternator with Regulator – High Power Marine and Commercial Alternator

Zeus A275L 1-2 Single Foot Alternator with Regulator

The highest power output alternator in its size/class.

Features:

• Engineered for High Energy Production.


• Suitable for Marine, RV, Military, and Commercial applications.


• Rapidly charges large battery banks.


• Coolest operating temperatures for increased performance.


• Runs 8 - 20% cooler than incumbent alternators due to Heat shedding coatings, Rectifier located on housing exterior, Dual cooling fans, and OEM Components.


• It is optimized for performance at idle speeds.


• Reduces the need for a generator by creating additional power with your engine.


• Unleash peak performance with E-Coat/Cerakote. Our advanced coating absorbs less heat, keeping the A275L cooler. This translates to more amperage for sustained periods.


• Use an ARCO Zeus Bluetooth alternator regulator or lithium battery charging for maximum performance.


• SAE J1171 Certified.


• Made in the U.S.A.

Technical Specifications:

• Voltage - 12v


• Field Type - P


• Rotor Poles - 16


• Stator Size - 138mm


• Frame Size - Large


• Weight - 14.9 lbs/6.7 kg


• Regulation - Internal/External (Internally regulated with adaptor for optional external regulation.)


• Output Voltage - 14.1v (Default)


• Finish - (Black) Cerakote or E-coating


• Cut-In RPM - 1,061 Alternator RPM


• Maximum Alt RPM - 19,000


• Battery Post - M8 Thread Post, Side Mount


• Standard Pulley - 49K6 (6-groove, 49mm)


• Pulley Mount - 17mm diameter shaft, 25mm long, threaded M17 x 1.5


• Pulley Hardware - M17 x 1.5 x 24mm nut, w/ 18mm ID x 29mm OD washer (Included)


• Diodes - 6 positive, 6 negative, 50A Rated, Avalanche


• Max Output (Cold, 9,000 RPM) - 311 Amps


• Sustained Cruising Output (Hot, 6,000 RPM) - 227 Amps


• Sustained Idle Output (Hot, 3,000 RPM) - 198 Amps


• Max Continuous Operating Temperature - 110C / 230F

Mounting Application:

• Replaces most domestic styles using a single 1 or 2 mounting foot (e.g., Motorola, Prestolite)

The ARCO Marine Zeus A275L alternator delivers unmatched power output within its class, making it ideal for demanding marine, RV, military, and commercial applications. Engineered for high energy production, this alternator rapidly charges large battery banks and is optimized to perform efficiently at idle speeds, reducing engine load and providing additional power without the need for a separate generator. Its robust construction and advanced features ensure reliable operation even under strenuous conditions, supporting prolonged usage and peak performance.
The Zeus A275L features a heat shedding coating with Cerakote or E-coating options that absorb less heat, maintaining cooler operating temperatures for increased longevity and performance. Dual cooling fans and an externally located rectifier contribute to its ability to run 8-20% cooler than conventional alternators, ensuring consistent output and reducing thermal stress. This alternator is also equipped with a M8 threaded side-mount battery post, a standard 6-groove pulley, and a threaded shaft for versatile installation. Its high maximum output of over 300 amps at cold start and sustained high outputs at cruise and idle speeds make it suitable for large power needs in rugged environments.
The ARCO Zeus A275L comes with internal regulation, with an option for external regulation via an included adaptor. It is SAE J1171 certified and proudly made in the USA, ensuring quality and compliance with industry standards. The alternator's design incorporates 16 rotor poles, a large frame size, and high-quality OEM components, making it a durable and dependable choice for heavy-duty applications. Compatible with Bluetooth regulators and lithium charging systems, this alternator provides versatile options for custom power management setups, maximizing efficiency and performance across various systems.

• Engineered for high energy production with rapid battery charging capabilities


• Designed for marine, RV, military, and commercial use


• Runs 8-20% cooler due to heat shedding coatings, exterior rectifier, and dual cooling fans


• Optimized for performance at idle speeds, reducing engine load


• High maximum output of 311 amps at cold start, sustaining over 200 amps during operation


• Built with durable OEM components and certified to SAE J1171 standards


• Includes versatile mounting options compatible with most domestic styles