Arco
ARCO Alternator - 48V 8kW - N62 Side Battery Post - Externally Regulated - Isolated Ground - 50mm K6 Pulley - 4604
£2,772.00
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4604
The ARCO Zeus A8000-48V is a large-frame, true native 48V high-output alternator that generates over 6kW (about 111 amps) by 4,000 RPM and peaks at 180 amps cold at 53.5V. It lets one engine bulk-charge a large 48V lithium or lead-acid bank in place of a separate generator on marine, RV and commercial systems. This isolated-ground marine version is fitted with an N62 clutch pulley, replacing the factory dual alternator on Mercedes Sprinter vans and Roadtrek, Thor and Winnebago motorhomes.
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Available for collection or delivery in ~2 days
Pickup available at Mercury Yacht Harbour
Usually ready in 2-4 days
Description
The Zeus A8000-48V brings large-frame charging to native 48V systems, the architecture behind most modern high-capacity lithium banks. Rather than stepping voltage up from a 12V or 24V machine, it generates 48V directly, so one engine-driven alternator can bulk-charge a big 48V bank quickly and take over from a noisy auxiliary generator on marine, RV and commercial installations.
It uses a native 48V rotor and field, a large 138mm stator, 80A avalanche diodes and an E-coat finish that helps it run cool and hold output under sustained load. ARCO rates the hot figures conservatively, after a full hour at 3,000 RPM beneath a plexiglass heat shield rather than in cool ambient air, so the cruising and idle numbers reflect a hot engine bay rather than a bench test.
As an externally regulated alternator it needs a dedicated controller such as the ARCO Zeus Bluetooth regulator to manage charging, which is essential for safe lithium profiles. This marine version is supplied with an isolated ground and an N62 clutch pulley, replacing the factory dual alternator on Mercedes Sprinter vans and popular Roadtrek, Thor and Winnebago motorhomes. It is SAE J1171 certified and made in the USA.
PRODUCT DETAILS
- True native 48V output for modern high-capacity lithium banks
- Over 6kW (111A) by 4,000 RPM; up to 180A cold at 53.5V
- Large-frame design bulk-charges 48V banks in place of a generator
- 80 A avalanche diodes for high sustained output
- Externally regulated (EX); pair with ARCO Zeus Bluetooth regulator
- Conservative hot ratings tested at 3,000 RPM under a heat shield
- N62 clutch pulley, isolated ground, replaces Mercedes Sprinter dual alternators
- Charges lithium (LiFePO4) and lead-acid banks with the right regulator
- SAE J1171 certified and made in the USA
- ARCO Zeus A8000-48V alternator
- External-regulation terminal block
- P-Type field harness
- Fitted 50K6 clutch pulley (6-groove, 50mm)
- M17 x 1.5 x 24mm pulley nut
- 18mm ID x 29mm OD washer
No exploded diagram available for this product.
No compatible transducers listed for this product.
No spares or accessories listed for this product.
Key specifications
| Voltage | 48V |
| Max Output (Cold, 9,000 RPM) | 180 A at 53.5V (9,630 W, 14.8kW PTO) |
| Sustained Cruising Output (Hot, 6,000 RPM) | 138 A at 53.5V (7,383 W, 10.5kW PTO) |
| Sustained Idle Output (Hot, 2,500 RPM) | 78 A at 53.5V (4,173 W, 6kW PTO) |
| Regulation | External Only (EX) |
| Standard Pulley | 50K6 clutch pulley (6-groove, 50mm) |
Electrical
| Field Type | P |
| Rotor Poles | 16 |
| Rotator Source Voltage | 48V (native) |
| Stator Size | 138mm |
| Diodes | 6 positive, 6 negative, 80A rated, avalanche |
| Cut-In RPM | 1,920 alternator RPM |
| Maximum Alternator RPM | 19,000 |
| Max Continuous Operating Temperature | 100C (212F) |
Mechanical
| Frame Size | Large |
| Weight | 7.2 kg (15.89 lb), heaviest option (N62 clutch) |
| Finish | Black E-coating |
| Battery Post | M8 thread post, side mount |
| Pulley Mount | 17mm dia shaft, 25mm long, threaded M17 x 1.5 |
| Pulley Hardware | M17 x 1.5 x 24mm nut with 18mm ID x 29mm OD washer (included) |
Fitment
| Housing/Mount | N62 clutch pulley mount |
| Ground Type | Isolated ground (marine) |
| Application | Mercedes Sprinter factory dual-alternator replacement, Roadtrek, Thor and Winnebago |
Compliance
| Certification | SAE J1171 certified |
| Country of Origin | USA |
No videos available for this product.
Does this alternator include a regulator?
No. Every ARCO Zeus alternator is externally regulated (EX), so it has no built-in regulator and will not charge on its own. It needs a dedicated external regulator, and ARCO recommends the Zeus Bluetooth Alternator Regulator, which is designed to get the most from the alternator across 12V to 48V systems and is essential for safe lithium charging.
Is this a true 48V alternator?
Yes. The A8000-48V uses a native 48V rotor and field, generating 48V directly rather than stepping up from a lower voltage. It produces over 3kW (about 55 amps) at 2,500 RPM and around 6kW (111 amps) at 4,000 alternator RPM, which makes it a strong match for modern high-capacity 48V lithium banks.
What do the hot output figures mean?
ARCO publishes deliberately conservative hot ratings. Instead of testing in cool ambient air, it runs the alternator for a full hour at 3,000 RPM under a plexiglass heat shield, with the stator reaching around 305F, far harsher than the industry-standard 140F ambient test. The hot cruising and idle figures therefore reflect what you can expect in a hot engine bay rather than an optimistic bench number.
Which engines does this version fit?
This version is fitted with an N62 clutch pulley and an isolated ground for marine use. It replaces the factory dual alternator on Mercedes Sprinter vans and on Roadtrek, Thor and Winnebago motorhomes.
