Arco Starting & Charging 4020 Zeus A275L High Output Marine Alternator 12V 275A J180 Saddle Mount

The ARCO Zeus A275L is the highest power output alternator in its size and class, delivering 12V power with a 275-amp sustained output rating. This high-performance unit is engineered for high energy production and comes equipped with a 3.15" J180 saddle mounting configuration, case ground (common rail), and terminal block for external regulator applications.

Key Features:

• 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, exterior-mounted rectifier, and dual cooling fans
• Optimized for performance at idle speeds
• Reduces the need for a generator by creating additional power with your engine
• E-Coat/Cerakote finish keeps the A275L cooler for sustained amperage output
• SAE J1171 Certified
• Proudly made in the U.S.A.

Technical Specifications:

• Voltage: 12V
• Field Type: P
• Weight: 14.9 lbs
• Regulation: External Only (EX) with terminal block
• Output Voltage: 14.1V (default)
• Standard Pulley: 49K6 (6-groove, 49mm)
• 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

This external-only unit comes with a terminal block and P-Type harness, and requires an external regulator such as the ARCO Zeus Bluetooth alternator regulator for optimal performance. The A275L won the 2023 IBEX Innovation Award for its exceptional real-world performance in demanding marine environments.