Description
ARCO Zeus 24V 4kW LTO Alternator | Boat Supply Store
For Yanmar Common Rail diesel engines introduced after 2013, this ARCO Zeus 24V 4kW LTO alternator addresses inadequate electrical system performance at lower RPMs. It features a native 24V rotor and field current, enabling sustained idle output of 108 Amps (2,970 Watts / 4.2kW PTO) at just 3,000 RPM, significantly boosting battery charging and powering onboard electronics even at dockside. With a 138mm stator size and a robust SAE J1171 certification for marine environments, this alternator ensures reliable operation for extended periods, such as during extended trolling operations off the Texas coast.
Key Features
- Low Turn On (LTO) technology for superior power generation at lower RPMs
- 4kW Power Output ensures robust electrical system performance
- 24V System Voltage optimized for modern marine electrical demands
- Isolated Ground (Common Rail) design for specific engine compatibility
- Runs Cooler with advanced heat shedding coatings and dual cooling fans
- Rapidly Charges Large Battery Banks minimizing downtime
- Optimized for Performance at Cruising Speeds for consistent power
- Made in the U.S.A. for quality assurance and reliability
Specifications
| Product Specifications |
|---|
Who This Is For
Marine diesel engine owners with Yanmar Common Rail engines introduced after 2013 (JH-CR, 3JH40, 4JH45, 4JH57, 4JH80, 4JH110) seeking to upgrade their electrical system for higher power output, faster battery charging, and improved efficiency, especially at lower engine speeds. This is for owners who demand maximum electrical performance and reliability from their vessel's core components.
How It Compares
| Feature | ARCO Zeus 24V 4kW LTO Alternator | Competitor |
|---|---|---|
| Voltage | 24V | 24V, 24V |
| Max Output (Watts PTO) | 5.7kW | Approx. 3kW, Approx. 2.4kW |
| Sustained Idle Output (Amps) | 108 Amps | Estimated lower than 108A, Estimated lower than 108A |
| Low Turn On (LTO) Technology | Yes | No, No |
| Native 24V Design | Yes | Likely uses 12V rotor/field, Likely uses 12V rotor/field |
Common Concerns Answered
What is the initial cost of the ARCO Marine Zeus 24V 4kW LTO Alternator?
The initial investment for this high-performance alternator is $1349.99, reflecting its advanced native 24V design and superior power output capabilities. While higher than some standard units, it offers long-term value through enhanced reliability and efficiency.
Is this alternator compatible with all Yanmar engines?
This specific ARCO Zeus alternator is designed for Yanmar Common Rail engines introduced after 2013, including models like the JH-CR, 3JH40, 4JH45, 4JH57, 4JH80, and 4JH110. Engine compatibility is critical for optimal performance.
What is the customer sentiment towards this alternator?
Customer feedback is predominantly positive, with boaters frequently highlighting the alternator's significantly improved charging performance and unwavering reliability under demanding marine conditions.
Frequently Asked Questions
What is the cut-in RPM for the ARCO Marine Zeus 24V 4kW LTO Alternator?
The ARCO Marine Zeus 24V 4kW LTO Alternator has a cut-in speed of 1,072 RPM, meaning it begins generating significant output at this engine speed.
What is the sustained cruising output of this alternator?
This alternator provides a sustained cruising output of 130 Amps, equivalent to 3,575 Watts or 5.1kW PTO, at 6,000 RPM.
What type of engines is this alternator compatible with?
This alternator is specifically compatible with Yanmar Common Rail engines introduced after 2013, including models such as JH-CR, 3JH40, 4JH45, 4JH57, 4JH80, and 4JH110.
Does this alternator require a separate regulator?
No, this alternator features external regulation, meaning the necessary voltage regulation is built into the unit and does not require a separate external regulator.
What makes this alternator run cooler than older designs?
The ARCO Zeus alternator runs cooler due to its native 24V design, which reduces internal heat generation, combined with heat-shedding E-coating, an external rectifier, and dual cooling fans, all contributing to prolonged lifespan and consistent output.
