Our factory, Zhenjiang TongLing electrics factory, located in Jiangsu China, has been engaged in researching, developing and producing solar junction box unit for almost 4 years. And with pleasure, we are the largest supplier to SUNTECH, which illustrate well that our products are more reliable and more competitive.

Meanwhile, we have already applied items of patent for our invention, and most of our products have passed TUV, UL dual certification. Thanks for visiting this page, if you have any interest on us, pls feel free to contact us, we're looking forward to be your most reliable supplier.