ARCO Marine Zeus A115/3500W 24V HD High Output Alternator – J180 Mount (4412)

The ARCO Marine Zeus A115/3500W (4412) is a high-output 24V heavy-duty alternator engineered for vessels and diesel applications with demanding electrical loads. Built for extended-duty performance and maximum charging efficiency, this alternator is ideal for large battery banks, inverter systems, and modern onboard electronics.

High Output 24V Charging Power

Designed to deliver consistent power in high-demand systems, the Zeus A115 provides:

• Max Output (Cold): 132 amps

• Sustained Output (Cruise): 104 amps @ 6,000 RPM

• Sustained Output (Idle): 89 amps @ 3,000 RPM 

This ensures fast and efficient charging for 24V battery systems, reducing engine runtime and improving energy availability onboard.

Built for Large 24V Battery Systems

The A115 is specifically designed for high-capacity electrical systems, including:

• 24V lithium (LiFePO4) battery banks

• AGM and deep-cycle systems

• High-load inverters and electronics

• Multi-bank charging setups

Its high energy output can reduce reliance on onboard generators by producing significant power directly from the engine. 

Advanced Cooling for Continuous Duty

Engineered for long runtimes under load, this alternator features:

• Dual internal cooling fans for lower operating temperatures

• Stable performance during extended use

• Increased lifespan and reliability 

J180 Mount (4” Foot) Configuration

This model uses a J180 mount (4” foot spacing), making it compatible with many large-frame marine diesel engines.

• Heavy-duty large case design

• Ideal for commercial and offshore applications

• Direct replacement for compatible J180 setups 

External Regulation Required

The Zeus A115 is externally regulated only, allowing precise control of charging profiles:

• Compatible with ARCO Zeus Bluetooth regulator

• Optimized for lithium and advanced battery chemistries

• Enables smart charging and system monitoring

Key Specifications

• Model: 4412

• Voltage: 24V

• Mount Type: J180 (4” mount)

• Max Output: 132A (cold)

• Sustained Output: 104A (cruise), 89A (idle)

• Power Rating: ~3500W

• Cut-In RPM: 1,288

• Max Alternator RPM: 10,000

• Pulley: K8 59mm

• Shaft Diameter: 7/8” (22.22 mm)

• Weight: 18.7 lbs

• Regulation: External Only (EX)

• Max Operating Temp: 125°C

Ideal Applications

• Offshore cruising vessels

• Commercial boats and workboats

• Yachts with 24V electrical systems

• Diesel engines requiring high-output alternators

• Boats upgrading from generator-dependent charging

Why Choose the ARCO Zeus A115 24V?

The ARCO Zeus A115/3500W 24V Alternator is a premium solution for boaters who need reliable, high-output charging in a 24V system. With its heavy-duty construction, advanced cooling, and smart external regulation capability, it delivers consistent power for today’s energy-intensive marine environments.