ARCO Marine Zeus A8000-48V 8kW 1-2 Single Foot Alternator w/Isolated Ground [4605]

Zeus A8000-48V 8kW Single Foot Alternator with Isolated Ground

The ARCO Zeus A8000-48V alternator is a game - changer. It starts at lower RPMs, runs cooler, and delivers more power than bulkier and heavier 48V alternators. At 2,500 RPM, it continuously generates over 3kW (55 Amps), and at 4,000 RPM, almost 6kW (111 Amps). In real - world use, a marine diesel engine charging at 1,200 RPM with a 3.13:1 pulley ratio generates over 5kW (97 Amps), and a Mercedes Sprinter at 750 RPM with a 3.21:1 ratio generates over 3kW (55 Amps)!

Many competitor alternators use 12V rotors for their 48V models, which is inefficient and limits output. This often requires the external smart regulator to reduce the field by up to 78%, risking unit damage. ARCO uses a native 48V rotor and field current, keeping the alternator cooler and extending its lifespan.

Features:

• Designed for high - energy production.
• Great for marine, RV, military, and commercial uses.
• Quickly charges large battery banks.
• Cool operation for better performance: heat - shedding coatings, exterior rectifier, dual cooling fans.
• Uses OEM components.
• Optimized for idle - speed performance.
• Creates extra power with your engine, reducing the need for a generator.
• With E - Coat/Cerakote, it maintains high - amp output by staying cool.
• Pair with the ARCO Zeus Bluetooth Alternator Regulator for best performance or lithium battery charging.
• SAE J1171 Certified and made in the U.S.A.

Technical Specifications:

• Voltage: 48v
• Field Type: P
• Rotor Poles: 16
• Stator Size: 138mm
• Frame Size: Large
• Weight: 15.89lbs/7.2kg
• Regulation: External Only
• Finish: (Black) E - coating
• Cut - In RPM: 1,920 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, 80A Rated, Avalanche
• Max Output (Cold, 9,000 RPM) at 53.5v: 180 Amps - 9,360 Watts – 14.8 kW PTO
• Sustained Cruising Output (Hot, 6,000 RPM) at 53.5v: 138 Amps - 7,383 Watts – 10.5 kW PTO
• Sustained Idle Output (Hot, 2,500 RPM) at 53.5v: 78 Amps 4,173 Watts – 6kW PTO
• Max Continuous Operating Temperature: 100°C / 212°F

Mounting Application:

• Replaces most domestic - style alternators with a single 1 or 2” mounting foot (e.g., Motorola, Prestolite).

Quick Guide (pdf)Brochure (pdf)

Using the ARCO Zeus A8000 - 48V alternator is easy. First, make sure to mount it correctly. It can replace most domestic - style alternators with a single 1 or 2” mounting foot. Connect it to your engine according to the specifications, and if you want the best performance, pair it with the ARCO Zeus Bluetooth Alternator Regulator. When using it, keep an eye on the RPM. It starts generating power at a relatively low RPM, so you don't have to rev your engine too high. Also, note that it runs cooler than many competitors, but still, try to avoid extreme operating conditions. For maintenance, regularly check the pulley and its hardware to ensure they are tight and in good condition. Inspect the battery post for any signs of corrosion. And since it has heat - shedding coatings and dual cooling fans, don't block the airflow around the alternator. If you follow these simple steps, your alternator will serve you well for a long time.