Don't look at the connector is only a small part, points out that the analysis report on the European market of a source, the running time to photovoltaic power plant 3 years, will more or less exposed some problems, and these problems in more than 50% from the connection problem. The current market on connector is known as the MC4, actually this is Shi Tao Bill Multi - Contact company in 2002 launched a product, MC is the brand of abbreviations, market acceptance is very high. At present, the connector market is very chaotic, most manufacturers do not know the real meaning of the MC4, the market is awash in duplicate, and the name calls MC4, the Shanzhai products of poor quality, unable to meet the operating requirements of the plant for decades, have power because no attention to the small details, caused the station fire, causing huge economic losses.