ARCO Zeus A275L Vortec Alternator with Regulator and High-Energy Bluetooth Regulator

Zeus A275L Vortec Alternator with Regulator Zeus High-Energy Alternator Regulator

Zeus A275L Vortec Alternator with Regulator

The highest power output alternator in its size/class.

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.


• Runs 8 - 20% cooler than incumbent alternators due to: Heat-shedding coatings, Rectifier located on housing exterior, Dual cooling fans, and OEM Components.


• It is optimized for performance at idle speeds.


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


• Unleash peak performance with E-Coat/Cerakote. Our advanced coating absorbs less heat, keeping the A275L cooler. This translates to more amperage for sustained periods.


• Use an ARCO Zeus Bluetooth alternator regulator or lithium battery charging for maximum performance.


• SAE J1171 Certified.


• Made in the U.S.A.

Technical Specifications:

• Voltage - 12V


• Field Type - P


• Rotor Poles - 16


• Stator Size - 138mm


• Frame Size - Large


• Weight - 14.9 lbs/6.7 kg


• Regulation - Internal/External (Internally regulated with adaptor for optional external regulation.)


• Output Voltage - 14.1v (Default)


• Finish - (Black) Cerakote or E-coating


• Cut-In RPM - 1,061 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) - 311 Amps


• Sustained Cruising Output (Hot, 6,000 RPM) - 227 Amps


• Sustained Idle Output (Hot, 3,000 RPM) - 198 Amps


• Max Continuous Operating Temperature - 110C / 230F

Mounting Application:

• Replaces Mando-type alternators using Vortec/GM pad mounting feet. (Found on many Mercruiser and Volvo Penta 3.0GLM, 3.0GLP, 4.3GXi, 5.7GiL, 5.7GXiL Marine Engines.) (GM Blocks)

Zeus High-Energy Alternator Regulator

ARCOs Zeus is the only high-energy external alternator regulator to feature Bluetooth and a native app (on IOS and Android) allowing for easy installation and configuration. With its intuitive interface, you can access information on your system that you never had before. This information will enable you to regulate your system and optimize your battery charge and alternator output, resulting in a safer experience while protecting your energy system investment.

Zeus is the only alternator regulator that can read 2 shunts at a time (the battery shunt and alternator shunt). This feature enables Zeus to react to inputs from the battery current/temperature and alternator current/temperature.

Through the ARCO Zeus application, you are in good hands. Your data is automatically logged and can be shared with your technician to troubleshoot your system remotely. You can even import your remote technicians configurations.

Zeus optimizes battery charges for 12-48 volt systems. Whether you are using Lithium (LiFePo4) batteries or lead-acid Deep Cycle batteries, Zeus has you covered with its pre-set battery libraries and configurable menus to optimize your charging profiles. Zeus manages a complex set of inputs by giving you easy-to-understand options.

Zeus also takes into consideration the power of your engine and allows you to configure the alternators power take-off from the engine by managing the field, or duty. An advanced feature of Zeus is that it can turn your engine into a dedicated generator with the press of a button, whereby it focuses the alternators performance on the creation of energy to replenish your battery bank quickly.

Consistent with Zeus ease of use, Zeus is the only alternator regulator on the market that comes with alternator/battery harnesses and 2 thermistor harnesses, without an additional charge, saving users money and time from sourcing harnesses.

Features:

• Secure Bluetooth connection


• Harnesses, Thermistors, and NMEA 2000 kit included


• Monitors the state of charge


• Can turn your engine into a dedicated generator with generator mode


• Pre-set battery libraries


• Data logging and sharing


• CAN bus and NMEA 2000-integrated networks


• Compatible with all voltage systems (12- 48V)


• IP66 IP67 rated


• 2-Year warranty

Technical Specifications:

• Enclosure dimensions without antenna - 8.2 x 5.9 x 2.4


• Enclosure dimensions with antenna - 8.2 x 7.5 x 2.4


• Weight - 1.7 lbs

In the Box:

• Zeus high-energy alternator regulator


• Battery wiring harness


• Alternator wiring harness


• 2 thermistors

The ARCO Zeus A275L Vortec Alternator is engineered for maximum power output in its class, making it an ideal choice for marine, RV, military, and commercial applications. This high-energy alternator features a robust design capable of rapidly charging large battery banks while maintaining cooler operating temperatures for enhanced reliability. Its advanced heat-shedding coatings, exterior-mounted rectifier, dual cooling fans, and OEM components ensure consistent performance even under demanding conditions. The alternator is optimized for performance at idle speeds, reducing the need for a separate generator and allowing your engine to generate additional power efficiently.
The A275L’s design includes features like a 14.1V default output voltage, 16 rotor poles, and a large frame size to support high current demands, with a maximum output of 311 amps at cold start. It is compatible with GM blocks and replaces Mando-type alternators commonly found on many marine engines. The unit is constructed with Cerakote or E-coating finishes, which absorb less heat and sustain higher amperage over extended periods. Its internal and external regulation options, along with high-quality diodes rated at 50A, ensure stable voltage regulation and prolonged component life.
The ARCO Zeus high-energy regulator complements this high-performance alternator with Bluetooth connectivity and a user-friendly app compatible with IOS and Android devices. This regulator can monitor the system’s state of charge, manage dual shunt inputs, and optimize battery charging across 12-48V systems, including lithium and lead-acid batteries. Capable of turning your engine into a dedicated generator with a simple toggle, Zeus enhances power generation efficiency and simplifies system management. The included harnesses, thermistors, and NMEA 2000 kit streamline installation and setup, making this package suitable for a variety of power systems.
Designed with durability and convenience in mind, the Zeus regulator features IP66/IP67 ratings for water and dust resistance, a compact form factor, and a two-year warranty. It supports CAN bus and NMEA 2000 networks, providing versatile integration options for modern energy systems. Whether used in marine, RV, or industrial environments, this combination of high-output alternator and advanced regulator offers reliable, efficient power management tailored to demanding applications.

Features:

• High power output with maximum of 311 amps cold start and 227 amps at cruising RPM

• Engineered for rapid charging of large battery banks

• Runs 8-20% cooler than standard alternators due to advanced heat management features

• Optimized for performance at idle speeds to enhance efficiency

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

• Includes ARCO Zeus Bluetooth alternator regulator with app for system monitoring and control

• Bluetooth connectivity with data logging, remote troubleshooting, and configuration

• Supports 12-48V systems, including lithium and lead-acid batteries

• Can convert engine operation into a dedicated power generator with a single toggle

• Durable finishes with Cerakote or E-coating for heat absorption and corrosion resistance

• Includes harnesses, thermistors, and NMEA 2000 kit for seamless installation

• Certified SAE J1171 for safety and reliability

• Water and dust resistant enclosure (IP66/IP67 rated)

• Made in the USA with a 2-year warranty