ARCO Zeus A225 Small High Output Alternator

The Highest Power Output Alternator in Its Class - High Output / High Amperage Alternator

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/Cerakote. 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.

Here’s a concise comparison of the DF315, DF4, and SF12 ARCO Zeus alternator mounting configurations:



Mount Code
Mount Type
Foot Style
Foot Spacing
Common Use
Notes




DF315
Dual Foot (Yanmar-style)
Dual
3.15 inches (80 mm)
Yanmar marine engines
Stable, compact mount for tight bays


DF4
Dual Foot (J180-style)
Dual
4 inches
Heavy-duty marine and industrial engines
Rigid, robust mounting


SF12
Single Foot (Universal, Delco Style)
Single
1" or 2" (adjustable)
Flexible marine/automotive applications
Adapter allows fit to multiple brackets




DF315 is ideal for Yanmar-style brackets.
DF315R is ideal for Yanmar-style brackets. R = Rear Battery Post
DF4 is suited for larger, more robust engine frames.
SF12 offers the most flexibility and is often used in retrofits or tight spaces.