ARCO Zeus A275L Vortec Alternator with Regulator

The ARCO Zeus A275L (Vortec, with Regulator) is the highest power output alternator in its size and class. It is designed for boaters who want high energy production suitable for marine, RV, military, and commercial applications, rapidly charging large battery banks.

Running 8-20% cooler than incumbent alternators thanks to heat shedding coatings, an exterior-mounted rectifier, dual cooling fans, and OEM components, this alternator is optimized for performance at idle speeds and reduces the need for a generator by creating additional power with your engine. E-Coat/Cerakote finish absorbs less heat for sustained amperage, SAE J1171 certified and made in the USA. Browse more options in our alternators and charging hardware category.

Key Features

• Large frame
• Internal/External regulation (internally regulated with adaptor for optional external regulation)
• 8-20% cooler operation
• SAE J1171 certified
• made in USA
• Fit: Vortec Engines
• Battery Post: M8 Thread, Side Mount
• Weight: 16.5 lb

Frequently Asked Questions

How does this alternator stay cooler than competitors? Heat shedding coatings, an exterior-mounted rectifier, dual cooling fans, and OEM components — 8-20% cooler.

What regulation does this alternator use? Internal/External regulation (internally regulated with adaptor for optional external regulation).

Where is this alternator made? The USA, SAE J1171 certified.