Zeus A275L J180 4" Alternator with Isolated Ground

The highest power output alternator in its size/class designed specifically for marine and heavy-duty applications.

Optimized Performance: Engineered for superior energy production, this alternator is perfect for marine, RV, military, and commercial uses, rapidly charging large battery banks.

Enhanced Features: With the coolest operating temperatures, dual cooling fans, and heat shedding coatings, the Zeus A275L operates efficiently even under heavy loads. It’s designed to minimize the reliance on generators by generating extra power directly from your engine. Coating technologies like E-Coat/Cerakote ensure the alternator stays cooler for sustained amperage output.

For maximum performance, pair it with the ARCO Zeus Bluetooth Alternator Regulator, ideal for lithium battery charging and other advanced applications. SAE J1171 Certified, and proudly made in the U.S.A.

• High energy production for demanding applications
• Expedited charging for large battery systems
• Cool operation with heat shedding features
• Supports optimized performance even at idle speeds
• Integrated dual cooling fans
• Can replace most Volvo Penta alternators with a 4" J180 mount
• Compatible with internal/external voltage regulation
• Maximum output of 311 Amps at 9,000 RPM
• Robust design with E-Coat/Cerakote for durability
• Made in the U.S.A. with quality components

Product Tags

ARCO Zeus A275L J180 Marine Alternator with Isolated Ground