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Description
ARCO Marine Zeus A275L 1"-2" Single Foot Alternator w/Regulator [4029]Zeus A275L 1" 2" Single Foot 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
Zeus A275L 1"-2" Single Foot 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 - 110°C / 230°F
Mounting Application:
- Replaces most domestic styles using a single 1” or 2” mounting foot (e.g., Motorola, Prestolite)
Quick Guide (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
4.2 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 5
Great for sun allergies
Size: 3 Fl Oz (Pack of 1), Style: SPF 100
Great for those with sun allergies!
Put this in my face and arms when traveling in my convertible.
No sun burn! No itchy skin later!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2026
★★★★★ 5
Pricey but works
Size: 3 Fl Oz (Pack of 1), Style: SPF 100
It works well and is definitely worth it, but it's pretty small and pricey for what you get.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 8, 2026
★★★★★ 5
Good
Size: 3 Fl Oz (Pack of 1), Style: SPF 100
Great Product no complaints!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
★★★★★ 5
Works great, TSA compliant!
Size: 3 Fl Oz (Pack of 1), Style: SPF 100
I LOVE spf 100, I know people like to say anything above 30 or whatever is pointless but let me say, when I use spf 100 I don't tan at all (and I DON'T want to tan, I'm Asian and the kind of person who walks outside for 5 minutes and I'm visibly slightly darker) and my husband is white and burns if out in the sun too much but this stuff not only prevented burn but I think also prevented tan for him too 🤷🏻♀️ I think these bottles are also awesome to be able to fly with too, we bought a few for our Punta Cana trip and we didn't tan or burn, and we only used a little over one bottle for 5 days (we only wore when we'd be out in direct sun a few hours each day, and my outfits didn't show a LOT of skin so less surface area). I hope this company continues selling this product, it'll always be my go to for travel sun screen now :)
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Reviewed in the United States on July 21, 2025
★★★★★ 4
Feels great on skin, but wish it was a larger amount.
Size: 3 Fl Oz (Pack of 1), Style: SPF 100
I haven’t tried this in the sun yet, so I can’t attest to how it works as intended, but so far I have tried it on my skin to see if it is as thick and white as others. It goes on very easy and smooth. I do not see a noticeable white cast and it soaks into the skin quickly. I am hoping it works well in the sun because I will repurchase. I just wish it was a larger amount.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 17, 2026
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