Our factory, Zhenjing Tongling Electrics 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 most of our products has 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.