Ignitions and Electrical› Charging Systems
ARCO MARINE
HIGH ENERGY ALTERNATOR
SKU: A09I A225S-12-DF315-EX-49K6
Moderate — 2–4 hours
Description
- Engineered for high energy production.
- Suitable for marine, RV, military, and commercial applications.
- Rapidly charges large battery banks.
- Coolest operating temperatures for increased performance, running 8-20% cooler than incumbent alternators due to:
- 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. Our advanced coating absorbs less heat, keeping the A225S cooler for sustained amperage output.
- For maximum performance or lithium battery charging, use the ARCO Zeus Bluetooth Alternator Regulator.
- SAE J1171 Certified.
- Models available with internal/external voltage regulator.
- Proudly made in the U.S.A.
Fitment
Fitment Guaranteed
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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | ARCO MARINE |
| Part Number | A09I A225S-12-DF315-EX-49K6 |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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