Arco Starting & Charging 4029 Zeus A275L High Output Marine Alternator 12V 275A Single Foot

The Arco Zeus A275L Single Foot Alternator delivers the highest power output in its size class, engineered specifically for demanding marine, RV, military, and commercial applications. This high-performance 12-volt alternator rapidly charges large battery banks and reduces the need for generator use by maximizing power production from your engine.

Advanced Cooling Technology:

• Runs 8-20% cooler than conventional alternators through advanced E-Coat/Cerakote heat-shedding finish
• External-mounted rectifier for superior heat dissipation
• Dual cooling fans maintain optimal operating temperatures
• Maximum continuous operating temperature of 230°F (110°C)
• Cooler operation translates to sustained high amperage output

Performance Specifications:

• Maximum output: 311 amps at 9,000 RPM (cold)
• Sustained cruising output: 227 amps at 6,000 RPM (hot)
• Sustained idle output: 198 amps at 3,000 RPM (hot)
• Optimized for exceptional performance at idle speeds
• Output voltage: 14.1V (default)
• Cut-in RPM: 1,061 alternator RPM
• Maximum alternator RPM: 19,000

Technical Details:

• 16-pole rotor with 138mm stator size
• P-type field with internal/external regulation capability
• 12 avalanche diodes (6 positive, 6 negative), 50A rated
• M8 threaded battery post, side mount
• Standard 49K6 pulley (6-groove, 49mm)
• 17mm diameter shaft, 25mm long, threaded M17 x 1.5
• Pulley hardware included
• Weight: 14.9 lbs

Premium Features:

• Compatible with Arco Zeus Bluetooth alternator regulator for advanced control
• Lithium battery charging capable for maximum performance
• SAE J1171 certified for quality assurance
• Made in the USA with OEM components
• Black Cerakote or E-coating finish for durability

Mounting: Replaces most domestic alternators using a single 1-inch or 2-inch mounting foot, including Motorola and Prestolite styles.