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The Leading Manufacturer of Waterproof Connectors & Custom Molding Solutions

Dongguan Win-Win Electrical Co., Ltd – Designing precision waterproof connectors and photovoltaic wire harnesses since 2014. Trusted by global brands across 50+ countries.

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About Win-Win Electrical

Founded in 2014, Dongguan Win-Win Electrical Co., Ltd specializes in the design, development, production, and sales of precision waterproof connectors and a wide range of photovoltaic wire harness solutions. Our products are widely used in household appliances, outdoor sports equipment, new energy systems, civil photovoltaic installations, automotive electronics, automation, control systems, and consumer electronics.

With our mission of "Connecting China Across the World," we focus on customer-centric innovation, backed by a professional engineering team, advanced testing equipment, and a comprehensive quality management system.

  • IP67 & IP68 Military-Grade Waterproof Ratings
  • Custom Plastic Injection Molding & Silicone Rubber Products
  • Exported to Over 50 Countries Including USA, Germany, Japan, Canada
Factory Production Line

Our Product Range

From waterproof USB connectors to custom silicone rubber components, we deliver high-performance, precision-engineered electrical parts for diverse industries.

Waterproof USB Connector

Waterproof USB Connectors

IP67/IP68 rated, ideal for outdoor and industrial applications requiring high durability and moisture resistance.

Electrical Parts
DC Power Jack

DC Power Jacks

Precision-engineered power input connectors with robust mechanical and electrical performance.

Electrical Parts
Audio Jack

Audio Jacks

High-fidelity audio connectors with durable plating and stable signal transmission.

Electrical Parts
Photovoltaic Connectors

Photovoltaic (Solar) Connectors

MC4-compatible waterproof connectors for solar panel installations, rated IP67/IP68.

Solar Energy
Custom Injection Molding Cases

Custom Plastic Injection Molding Cases

Tailored enclosures and housings for electronics, medical devices, and industrial equipment.

Custom Molding
Silicone Rubber Products

Custom Silicone Rubber Products

High-temp resistant seals, gaskets, tubes, and molded parts for automotive and industrial use.

Silicone Solutions
Photovoltaic Wire Harness

Photovoltaic Wire Harnesses

Custom solar cable assemblies with waterproof connectors and UV-resistant insulation.

Solar Energy
Plastic Coated Cables

Custom Plastic Coated Photovoltaic Cables

Durable, weatherproof cables for solar and outdoor electrical systems.

Solar Energy
Junction Box

Photovoltaic Junction Boxes

Integrated protection and connection units for solar panels with high thermal stability.

Solar Energy
Prototype Molding

Prototype Injection Molding

Rapid prototyping services for product development and testing phases.

Custom Molding

Our Capabilities

From in-house mold building to full-scale production, we control every step to ensure quality and reliability.

In-House Mold Building

All customer injection molds are built in-house in Guangdong with an unlimited tooling life warranty as long as we run your production.

No Outsourcing

Every component is manufactured in our own facility in China. We never outsource, ensuring full control over quality and delivery.

Advanced Testing Equipment

Equipped with over 11 main testing systems to ensure every product meets IP67/IP68 and industry standards.

Why Choose Us?

Let the numbers speak for us and our clients.

2014
Established
9+
Years of Experience
11+
Testing Equipment
50+
Exporting Countries

After 9 years of brand development, we’ve built a production base and R&D marketing center in Qingxi, Dongguan, becoming a leading one-stop waterproof product solution provider globally.

Our annual production capacity includes 2.4 million silicone tubes, 4 million rubber tubes, and 100 tons of automotive silicone components — backed by 80 employees including engineers, technicians, and inspectors.

Frequently Asked Questions

What waterproof ratings do your connectors support?

Our waterproof connectors meet IP67 and IP68 military-grade standards, ensuring reliable performance in harsh environments.

Can you produce custom molded parts?

Yes, we offer full custom plastic injection molding and silicone rubber molding services, from prototyping to mass production.

Do you export internationally?

Yes, our products are exported to over 50 countries including the USA, Germany, Japan, Canada, and the UK.

Are your solar connectors MC4 compatible?

Yes, our photovoltaic connectors are designed to be MC4-compatible and meet all relevant solar industry standards.

Do you offer prototype services?

Yes, we provide rapid prototype injection molding to help you validate designs before full-scale production.

Get in Touch

For inquiries, quotes, or technical support, visit our official website to connect with our team.

Visit Official Website

Phone: +86-180-0268-6780

Domain: connectorchina.cn

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