ARCO Marine Zeus 24V 4kW Low Turn On (LTO) Alternator with Isolated Ground for Common Rail Engines

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

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:

• Must Be used on Yanmar Common Rail Engines introduced after 2013 (JH-CR, 3JH40, 4JH45, 4JH57, 4JH80, 4JH110).

The ARCO Marine Zeus 24V 4kW Low Turn On (LTO) alternator is engineered for high performance in demanding marine, RV, military, and commercial applications. Featuring a native 24V rotor and field current, it delivers superior efficiency, runs cooler, and produces significantly more power at lower RPMs compared to older or competitor models. With a robust design that continuously generates over 1.4kW (51 Amps) at just under 1,500 RPM and nearly 2.4kW (87 Amps) at 2,000 RPM, this alternator ensures reliable power generation during engine idling and cruising. Its ability to produce high amperage at low engine speeds reduces the need for a separate generator, making it ideal for applications requiring rapid battery charging and sustained power output. The design incorporates heat shedding coatings, dual cooling fans, and an exterior-mounted rectifier to maintain optimal operating temperatures, thereby extending lifespan and maintaining performance under demanding conditions.
Constructed with OEM components and finished with a black E-coating, the ARCO Zeus alternator is built for durability and longevity. The unit is equipped with a side-mount M8 threaded post, a standard 49mm multi-groove pulley, and an M17 x 1.5 threaded shaft for easy installation. Its high-output diodes rated at 50A ensure safe and reliable operation, while the regulation is designed for external control, providing flexibility for various system configurations. The alternator's efficient design is further enhanced by the use of heat shedding coatings like Cerakote, which help manage operating temperatures during high-demand scenarios. Certified by SAE J1171 and proudly manufactured in the USA, this alternator provides confidence in quality and performance.
The Zeus 24V alternator features a large frame size with a weight of approximately 16 pounds, and it is suitable for Yanmar common rail engines introduced after 2013. It has a cut-in RPM of about 1,072 and a maximum alternator RPM of 19,000, with maximum cold output reaching 144 amps at 9,000 RPM. Its sustained hot output at cruising speeds ensures consistent power delivery, supporting large battery banks and demanding electrical systems. Use the ARCO Zeus Bluetooth Alternator Regulator for enhanced performance and optimal lithium battery charging, making this alternator a versatile and reliable choice for high-energy applications.Whether you're outfitting a marine vessel, RV, or military vehicle, the ARCO Marine Zeus 24V 4kW alternator offers a high-performance, durable power source designed for efficiency and longevity in challenging environments.

Features:

• Engineered for high energy production with native 24V rotor and field current

• Operates cooler and more efficiently than older or competitor models

• Generates over 1.4kW at just under 1,500 RPM and nearly 2.4kW at 2,000 RPM

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

• Rapidly charges large battery banks for extended use

• Heat shedding coatings and dual cooling fans enhance operating temperatures

• Rectifier located on exterior housing for improved cooling and maintenance

• OEM components ensure durability and reliability

• Optimized for performance at cruising speeds and engine idling

• Reduces reliance on a generator by creating additional power with your engine

• Unleashes peak performance with E-Coat/Cerakote coating for sustained amperage

• Compatible with ARCO Bluetooth Alternator Regulator for maximum efficiency

• SAE J1171 Certified for quality assurance

• Proudly made in the USA for assured craftsmanship