ARCO Marine Zeus A275L J180 4-Inch Alternator with Isolated Ground and Terminal Block

Zeus A275L J180 4 Alternator with Isolated Ground Terminal Block

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.
• Heat shedding coatings
• Rectifier located on housing exterior
• Dual cooling fans
• OEM components
• 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, keeping the A275L cooler for sustained amperage output.
• Use the ARCO Zeus Bluetooth Alternator Regulator for maximum performance or lithium battery charging.
• SAE J1171 Certified.
• Models available with internal/external voltage regulator.
• Proudly 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 Applications:

• Replaces most Volvo Penta alternators using a 4 J180 saddle-style mount

The ARCO Marine Zeus A275L J180 4-inch alternator is engineered to deliver the highest power output within its size class, making it ideal for demanding marine, RV, military, and commercial applications. This alternator features a robust design with a focus on high energy production, capable of rapidly charging large battery banks and supporting critical power needs. Its advanced cooling system, including heat shedding coatings and dual cooling fans, ensures optimal operating temperatures, which enhances performance longevity and reliability in challenging environments. The exterior-mounted rectifier and the use of OEM components contribute to durability and ease of maintenance. The unit is optimized for performance at idle speeds, reducing the need for a separate generator by harnessing engine power more efficiently to generate additional electrical energy. The use of E-Coat or Cerakote finishes, such as the Cerakote or E-coating options, helps keep the alternator cooler during operation, allowing for sustained amperage output even under heavy loads. For maximum performance, especially when charging lithium batteries or utilizing advanced regulation, pairing this alternator with the ARCO Zeus Bluetooth Alternator Regulator is recommended, offering precise control and customization. Certified under SAE J1171 standards, the ARCO Marine Zeus A275L is available with either internal or external voltage regulation options, providing versatile solutions tailored to various systems and applications. Made proudly in the U.S.A., this alternator combines performance, durability, and efficiency in a compact design that fits most saddle-style mounts. Its high maximum output—over 300 amps at cold start—and sustained hot running capabilities make it an excellent choice for those seeking reliable, high-performance power generation from a compact unit. The alternator's design includes a side-mount M8 threaded battery post, a standard 6-groove pulley, and a threaded shaft with hardware included for easy installation. With a weight of approximately 15 pounds and a large frame size, it balances power and practicality for a variety of demanding uses, providing peace of mind and dependable operation for professional and recreational applications alike.

Features:

• High energy production designed for demanding applications

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

• Rapidly charges large battery banks efficiently

• Advanced cooling system with heat shedding coatings and dual fans

• Exterior-mounted rectifier for improved durability

• OEM components ensure reliable performance

• Optimized for high performance at idle speeds

• Reduces reliance on generators by harnessing engine power

• Enhanced cooling with E-Coat and Cerakote finishes for sustained amperage

• Compatible with ARCO Zeus Bluetooth Alternator Regulator for advanced control

• SAE J1171 certified for industry standards compliance

• Available with internal or external voltage regulation options

• Made in the U.S.A. for quality assurance