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Description
ARCO Marine Zeus A275L J180 4" Alternator w/Isolated Ground RegulatorZeus A275L J180 4" Alternator with Isolated Ground & 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. Heat shedding coatings Rectifier located on housing exterior Dual cooling fans OEM components Optimized for performance at idle
Zeus A275L J180 4" Alternator with Isolated Ground & 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.
- Heat shedding coatings
- Rectifier located on housing exterior
- Dual cooling fans
- OEM components
- 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, keeping the A275L cooler for sustained amperage output.
- Use the ARCO Zeus Bluetooth Alternator Regulator for maximum performance or lithium battery charging.
- SAE J1171 Certified.
- Models are available with an internal/external voltage regulator.
- Proudly 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 - 110°C / 230°F
Mounting Application:
- Replaces most Volvo Penta alternators using a 4” J180 saddle-style mount
Quick Guide (pdf)
Brochure (pdf)
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 3
Taking forever but worth it
Size: 1-Panel, Size: 1-Panel
Love the product. However, trying to take the screws etc out of its box, it’s almost impossible due to the adhesive inside it. I have neck and arm issues so for me it was even more difficult. Adhesive stuck to each washer and screw so I had adhesive all over my hands then I had to get it off of the items.
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Reviewed in the United States on April 21, 2025
★★★★★ 5
Solid piece; easy to assemble. I bought 2 more.
Color: White With Silver Handle, Size: 24x30
I don't write many reviews but this is a genuinely good cabinet! I checked out Lowe's and was underwhelmed with the quality of what they had on hand so I bought this. It feels like solid construction and was pretty easy to assemble (though I consider myself handy). It looks great, it's got a nice amount of storage space, and it feels like a good value overall IMO. Maybe it's a touch on the pricy side, but in the end, I feel like I got my money's worth.
The one knock is that they don't really give instructions on how to install the piece of wood it sits on (called a French Cleat). They gave three drywall anchors with some very long screws. One of my French cleat holes was in front of a stud so I had to use my own screw to mount that one. Other than that, great piece overall and in fact I bought 2 more!
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Reviewed in the United States on February 6, 2026
★★★★★ 5
Awesome cabinet
Color: White With Silver Handle, Size: 24x30
I love this cabinet. It was extremely easy to assemble - instructions were easy to follow and assembly went smooth. I liked it so much I ordered a second one. It’s very spacious and it was great to have an adjustable shelf - doors were easy to adjust and all of the needed hardware was included. It really looks great in our bathroom.
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Reviewed in the United States on April 7, 2026
★★★★★ 5
Quality bathroom cabinet. Easy to build yourself, but heavy for one person to hang.
Color: White With Silver Handle, Size: 24x30, Color: White With Silver Handle, Size: 24x30
Finally, a product that the customer has to build, that is worth the price paid. This cabinet is extremely well made. The quality of the soft close hinges is also very good, and totally adjustable. The exterior of the cabinet, the finish, which is moisture proof, is also very well done. My husband put the cabinet together alone. He remarked , all the holes lined up, making putting it together easy, and fast. It was simple to follow the instructions, taking him about 30 to hang time. I am very pleased with this purchase, so much so, I will be purchasing this same cabinet for our upstairs bathroom.
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Reviewed in the United States on March 10, 2026
★★★★★ 4
Recommend, sturdy, good hardware, easy hang
Color: Navy Blue With Silver Handle, Size: 24x30
This is quite nice. It is sturdier than I expected. The way it hangs is really nice, it will be easy to lift off to paint the wall. The hinges are nice and soft close. One bad thing is it is quite smelly right away. I keep forgetting to keep the doors open to air that out so every time I open it I am still hit with the bad chemical smell. There were also sticky areas around the edges from the packaging that I had to work hard to get off and still don’t have quite all of it off.
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Reviewed in the United States on May 1, 2026