OE-Grade Water-Cooled Alternators Manufacture

OE-Standard Alternators for Heavy-Duty, Marine, and Industrial Applications. Superior cooling, high durability, and guaranteed performance under extreme conditions.

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What Makes Water-Cooled Alternators Different?

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Built for Heavy Loads

Handles continuous high-power output (40kW+)

Superior Heat Dissipation

Performs in high- ambient temperatures

Adapted for Harsh Sites

Resistant to dust and tough environments

40SI & 55SI Water-Cooled Alternators

40SI New Alternator

The 40SI New Alternator offers 30% better cooling and 20% longer life, ensuring reliable power for trucks, buses, and machinery.

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55SI New Alternator

The 55SI New Alternator operates up to +50°C, ensuring reliable power for mining, marine, and heavy construction applications.

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Why Water-Cooled Alternators Outperform Air-Cooled Systems

Cooling Effect

Excellent,designed for heavy-duty conditions

Noise Level

Lower Noise, Quieter Operation

Env.Adaptability

Superior adaptability in high-altitude, high-temp, dusty env.

lnitial Investment

Medium, with higher long-term returns (TCO)

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Elecdurauto Water Cooled Alternators Designed for These and More Heavy-Duty Application

Cranes&Construction Machinery

40Sl and 55Sl series water-cooled alternator powers hydraulic and electronic systems for mobile cranes, tower cranes, excavators, and loaders, ensuring consistent performance for high-demand tasks.

Heavy-Duty

Trucks

40Sl and 55Sl series water cooled alternator meets the high electrical demands and reliability requirements of long-haul trucks, specialty vocational vehicles, and mining trucks.

Auxiliary Power

Systems

Elecdurauto water cooled alternator provides primary or backup power for industrial facilities, especially in continuous high-current scenarios (e.g.. 160Aor 250A) where reliability is critical.

Power Generation

Water cooled alternator serves as a core, reliable component for stationary diesel/gas generator sets and mobile power units, ensuring stable electricity generation over long periods.

Industrial Equipment

Delivers consistent powerto stationary or semi-stationary heavy machinery such as factory production lines, pump stations,compressors, and automated warehouse systems.

Marine Equipment

Provides reliable power for main/auxiliary engines, propulsion systems, and deck machinery, with superior resistance to corrosion from humidity and salt spray.

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Factory Direct. MOQ from 1 Units. Bulk Pricing Available.

Looking for flexible order quantities and competitive pricing?
At Elecdurauto, we support minimum orders from just 1 units — perfect for sample testing or pilot distribution. Whether you're sourcing for OEM, aftermarket, or fleet maintenance, our factory.

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Why Elecdurauto Water-Cooled Alternators Are More Reliable?

Tackling Rising Power Demands and Battery Wear
Elecdurauto water cooled alternators deliver a stable 14V output, meeting the needs of ECUs, telematics, lighting, and AC even at low RPMs (<1000 RPM).
Reducing Fuel Costs and Heat Management Challenges
Optimized internal liquid cooling channels boost heat exchange efficiency by 25% maintaining core temperatures below 80°C for consistent high power output. Compared to traditional air-cooled systems, Elecdurauto water cooled alternator saves up to 15% in fuel costs annually ideal for 24/7 industrial operations.
Extending Equipment Life and Minimizing Downtime
Equipped with heavy-duty bearings designed forhigh-vibration environments, these alternators lastover 10,000 hours. Brushless technology eliminatesbrush wear, cutting maintenance frequency by 40% and reducing costly downtime.
Protecting Battery Health for Better ROI
Featuring industrial-grade rectifiers with 50% higher heat resistance, they maintain voltage stability (+0.2V) even at 120°C, extending heavy-duty battery life by 2-3 years and lowering replacement costs.

Trusted by Global Distributors and OEM Partners

Backed by OE-level quality systems and scalable production, Elecdurauto supports long-term cooperation with international distributors, fleet maintenance providers, and equipment manufacturers.

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Quality and Service You Can Depend On

Our water-cooled alternators are produced through OE-certified facilities with rigorous quality control to ensure consistent reliability in heavy-duty applications.

Backed by high-capacity manufacturing, customizable specifications, and export-ready logistics, we provide B2B buyers with efficient, scalable, and globally trusted power solutions.
- Water-Cooled Alternators Quality and Service
- Water-Cooled Alternators Quality and Service
- Water-Cooled Alternators Quality and Service
- Water-Cooled Alternators Quality and Service
- Water-Cooled Alternators Quality and Service
- Water-Cooled Alternators Quality and Service

Water-Cooled Alternators FAQ — Expert Insights for OEM & Heavy-Duty Buyers

How can distributors or OEMs start cooperation with Elecdurauto?

You can contact our sales team for model verification and quotation. We offer stable supply, regional exclusivity options, and co-branding support for long-term partners. Elecdurauto currently serves distributors across Asia, Europe, and the Americas.
How do you handle packaging and export logistics?

We use heavy-duty export packaging with moisture protection and labeling by part number or customer branding. Consolidated shipments, palletized loading, and documentation for customs clearance are all included.
What warranty and after-sales support do you provide?

All water-cooled alternators come with a 18-month warranty covering manufacturing defects. Our technical support team offers installation guidance, troubleshooting, and performance evaluation for partners worldwide.
How does Elecdurauto ensure consistent quality?

Each alternator undergoes 100% functional testing before shipment — covering current output, heat endurance, and insulation resistance. Batch traceability and in-house endurance testing guarantee long-term reliability for global distributors.
What is the minimum order quantity (MOQ) and lead time?

Typical MOQ starts from 10–20 units per model. Standard production lead time is 25–35 days, depending on order size. For repeat customers, we offer stock support and faster turnaround.
Can I request custom designs or specifications?

Yes. We support OEM and ODM customization — including voltage, mounting configuration, and connector types — for engine manufacturers, fleet maintenance networks, and equipment builders.
What are the main performance benefits?

Water-cooled alternators provide up to 25% better heat dissipation and 15% lower fuel consumption compared with air-cooled units. They deliver consistent charging even under high electrical loads, making them ideal for 24/7 duty cycles.
Do your alternators meet OEM or OE quality standards?

Absolutely. Elecdurauto is an OEM-grade manufacturer certified to IATF16949 and ISO9001. Every alternator is tested for output stability, vibration resistance, and durability to meet or exceed OE-equivalent standards.
Are these alternators suitable for my equipment?

Yes. Our 40SI and 55SI water-cooled alternators are designed to replace or integrate with most heavy-duty, marine, and industrial engines. We provide full cross-reference lists and dimension drawings to verify exact compatibility before shipping.
What makes Elecdurauto water-cooled alternators different from regular ones?

Elecdurauto alternators use an advanced liquid-cooling system that keeps internal temperatures below 80°C, even during continuous operation. This ensures more stable voltage output, longer component life, and higher reliability than traditional air-cooled models.

OE-Grade Water-Cooled Alternators Manufacture

What Makes Water-Cooled Alternators Different?

 Built for Heavy Loads

 Superior Heat Dissipation

 Adapted for Harsh Sites