ARCO Marine Zeus 24V 4kW Low Turn-On Alternator with Isolated Ground - Part 4401

Zeus 24V 4kW Low Turn On (LTO) 3.15 Alternator with Isolated Ground

The ARCO Zeus 24v 4kW LTO alternator turns on at lower RPMs, runs cooler, and provides more power than older designs that are larger and heavier. This alternator continuously generates over 1.4kW (51 Amps) at just under 1,500 RPM and almost 2.4kW (87 Amps) at 2,000 Alternator RPM. Put in real-world terms, a marine diesel engine idling at 750 RPM with a 2:1 pulley ratio is generating over 1.5kW (55 Amps), and a Mercedes Sprinter at 750 RPM with a 3.21:1 ratio is generating over 2.5kW (91 Amps)!

The ARCO Zeus 24v 4kW alternator turns on at lower RPMs, runs cooler, and provides more power than older designs that are larger and heavier. The newest generation of 24V performance has arrived.

Competitors 24V alternators utilize a 12V rotor and field current which is less efficient and limits output at all RPMs. ARCO utilizes a native 24V rotor and field current. This results in our 24V alternator running cooler than competitors 24V alternators, having a direct impact on the alternator lifespan.

Features:

• Engineered for high energy production.


• Suitable for marine, RV, military, and commercial applications.


• Rapidly charges large battery banks.


• Coolest operating temperatures for increased performance:


• Heat shedding coatings


• Rectifier located on housing exterior


• Dual cooling fans


• OEM components


• Optimized for performance at cruising speeds.


• Reduces the need for a generator by creating additional power with your engine.


• Unleash peak performance with E-Coat/Cerakote, keeping the high amp alternator cooler for sustained amperage output.


• Use the ARCO Zeus Bluetooth Alternator Regulator for maximum performance or lithium battery charging.


• SAE J1171 Certified.


• Proudly made in the U.S.A.

Technical Specifications:

• Voltage - 24v


• Field Type - P


• Rotor Poles - 16


• Stator Size - 138mm


• Frame Size - Large


• Weight - 15.89lbs/7.2kg


• Regulation - External Only


• Finish - (Black) E-coating


• Cut-In RPM - 1,072 Alternator RPM


• Maximum Alt RPM - 19,000


• Battery Post - M8 Thread Post, Side Mount


• Standard Pulley - 49K6 (6-groove, 49mm)


• Pulley Mount - 17mm diameter shaft, 25mm long, threaded M17 x 1.5


• Pulley Hardware - M17 x 1.5 x 24mm nut, w/ 18mm ID x 29mm OD washer (Included)


• Diodes - 6 positive, 6 negative, 50A Rated, Avalanche


• Max Output (Cold, 9,000 RPM) at 27.5v - 144 Amps - 3,960 Watts 5.7Kw PTO


• Sustained Cruising Output (Hot, 6,000 RPM) at 27.5v - 130 Amps - 3,575 Watts 5.1Kw PTO


• Sustained Idle Output (Hot, 3,000 RPM) at 27.5v - 108 Amps - 2,970 Watts 4.2kW PTO


• Max Continuous Operating Temperature - 100C / 212F

Mounting Application:

• Replaces most small case styles using a 3.15 J180 saddle style mount (e.g., Hitachi, Lucas, Mitsubishi) Most Yanmars.

The ARCO Marine Zeus 24V 4kW Low Turn-On (LTO) alternator offers superior performance with the ability to turn on at lower RPMs, making it ideal for marine, RV, military, and commercial applications. This high-efficiency alternator runs cooler, thanks to advanced heat shedding coatings and dual cooling fans, which extend its lifespan and ensure reliable operation under demanding conditions. Its design incorporates a native 24V rotor and field current, providing increased output and reduced operating temperatures compared to competitors that utilize a 12V rotor, resulting in enhanced durability and consistent power delivery.
At just under 1,500 RPM, the ARCO Zeus delivers over 1.4kW (51 Amps), and at 2,000 RPM, it produces nearly 2.4kW (87 Amps). For practical applications, a marine diesel engine idling at approximately 750 RPM with a 2:1 pulley ratio can generate over 1.5kW (55 Amps), while a Mercedes Sprinter at the same RPM with a 3.21:1 ratio can produce over 2.5kW (91 Amps). This capability significantly reduces reliance on auxiliary generators by harnessing engine power more efficiently. Designed with OEM components and a robust frame, the Zeus alternator is built for continuous high-performance operation and long-term durability.
The unit features a 49mm multi-groove pulley, M8 side-mount battery posts, and is SAE J1171 certified for safety and reliability. Its external regulation and optional Bluetooth regulator support maximum customization and performance tuning, including optimized lithium battery charging. The alternator's maximum rotational speed exceeds 19,000 RPM, with a cut-in RPM of around 1,072, ensuring rapid response at low engine speeds. Its rugged black E-coating finish and avalanche-rated diodes further enhance resilience against harsh environments. Overall, the ARCO Zeus alternator combines innovative cooling, efficient design, and high power output to meet demanding energy needs in various mobile and stationary power systems.

Features:

• Engineered for high energy production and efficiency

• Suitable for marine, RV, military, and commercial applications

• Rapidly charges large battery banks

• Advanced cooling system with heat shedding coatings and dual fans for cooler operation

• Exterior-mounted rectifier for improved heat dissipation

• Built with OEM-grade components for durability

• Optimized for performance at cruising speeds

• Reduces the need for a generator by generating additional power from engine RPM

• E-Coat/Cerakote coating for high-temperature resistance and cooler operation

• Compatible with ARCO Bluetooth Alternator Regulator for enhanced performance

• SAE J1171 certified for safety and reliability

• Made in the USA for quality assurance