Our factory, Yangzhong TongLing electrical equipment factory, located in Jiangsu China, has been engaged in researching, developing and producing PV junction box unit for almost 5 years. And with pleasure, we are one of the largest appointed supplier to SUNTECH, which illustrate well that our products are more reliable and more competitive; Meanwhile, we already applied items of patent for our invention, and our products has passed TUV certification; Thanks for visiting this page, if you have any interest on us, pls feel free to contact us, we&＃039;re looking forward to be your most reliable supplier.