Reliable Solar Junction Boxes & Connectors

Sinotech Solar Co., Ltd. – A trusted Chinese manufacturer since 2013, delivering high-performance photovoltaic junction boxes and connectors to over 10 countries worldwide.

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About ST Solar

Founded in 2013, Sinotech Solar Co., Ltd. has rapidly grown into one of China's leading manufacturers of photovoltaic junction boxes. With over a decade of combined industry experience, our team is committed to producing high-quality, reliable solar components that meet international standards.

As a dedicated manufacturer and supplier, we focus on innovation, durability, and performance. Our products are now distributed across more than 10 countries and are trusted by solar installers and system integrators for their long-term reliability in diverse environmental conditions.

2013

Founded

10+

Countries Served

10+

Years Industry Experience

Junction Box & Connector Specialist

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Our Products

High-performance solar junction boxes and connectors engineered for durability, safety, and efficiency in photovoltaic systems.

ST608

High-current solar junction box with enhanced thermal management and IP68 rating.

ST605

Compact design junction box ideal for residential and commercial solar panels.

ST609

Advanced junction box with integrated bypass diodes and UV-resistant housing.

ST4M

Male solar connector with secure locking mechanism and 1500V DC rating.

ST4F1500V

Female connector rated for 1500V, compatible with industry-standard MC4 systems.

ST4F

High-efficiency female solar connector with corrosion-resistant contacts.

00280OK

Industrial-grade junction box with superior heat dissipation and long service life.

Custom Solutions

Tailored junction boxes and connectors for OEM and large-scale solar projects.

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Why Choose ST Solar?

We combine engineering excellence with rigorous quality control to deliver solar components you can trust.

Reliability

Our junction boxes and connectors are built to withstand extreme temperatures, UV exposure, and harsh weather conditions.

Precision Engineering

Designed with attention to electrical efficiency, thermal performance, and mechanical durability.

Global Reach

Trusted by partners in over 10 countries, with consistent quality and on-time delivery.

Latest News

Insights and guides on photovoltaic junction boxes and solar connectors.

November 19, 2020

How to Choose a Photovoltaic Junction Box

The main information for selection should be the current size of the component and the maximum working current...

November 19, 2020

Types of Photovoltaic Junction Boxes

Traditional photovoltaic junction box features strong anti-aging and UV resistance...

November 19, 2020

Structure of Solar Junction Box

Many types of mainstream junction boxes exist, differing in connection method with the bus bar...

Get in Touch

Reach out to ST Solar for product inquiries, technical support, or partnership opportunities.

(86) 0574-63863891

[email protected]

No.112, Dianqiao Rd., Changhe Town, Cixi City, Ningbo, Zhejiang 315326, China

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