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 1-2 Inch Single Foot Alternator with Regulator is engineered to deliver the highest power output within its size and class, making it an ideal choice for demanding marine, RV, military, and commercial applications. Its design enables rapid charging of large battery banks, reducing dependency on generators and providing reliable power during extended use. Featuring advanced heat shedding coatings, the A275L operates at temperatures up to 20% cooler than conventional alternators, ensuring increased performance and longevity. The exterior-mounted rectifier, dual cooling fans, and OEM-grade components contribute to its efficient heat dissipation and durability, making it suitable for high-demand environments.
This alternator is optimized for performance at idle speeds and is capable of producing a maximum of 311 amps at cold start, with sustained hot cruising output around 227 amps. Its internal regulation system, with optional external regulation compatibility, maintains a stable output voltage of 14.1 volts, critical for consistent battery charging. The robust construction features a large frame size, 16 rotor poles, and a 138mm stator, all designed to support high amperage production. The alternator's black Cerakote or E-Coating finish enhances corrosion resistance, ensuring reliable operation in harsh conditions.
The ARCO Zeus A275L is equipped with a standard 6-groove pulley, M8 threaded side mount post, and a threaded M17 x 1.5 shaft for versatile installation. Its internal diodes, rated at 50A each, are avalanche-rated for added reliability. Designed to replace most domestic models with a single or dual foot mount, this alternator is built in the USA and certified under SAE J1171 standards. Whether used in marine vessels, recreational vehicles, or heavy-duty equipment, the Zeus A275L offers unmatched power, durability, and efficiency for professional and enthusiast applications alike.
Features:
- High energy production optimized for demanding applications
- Suitable for marine, RV, military, and commercial environments
- Rapidly charges large battery banks, reducing generator dependency
- Operates up to 20% cooler with advanced heat shedding coatings and dual cooling fans
- Optimized for high performance at idle speeds
- Unleashes peak amperage with Cerakote/E-Coat finish for better heat absorption
- Compatible with ARCO Zeus Bluetooth regulator and lithium battery charging
- SAE J1171 certified for reliability and safety
- Made in the USA with OEM-grade components
