... 25years,another parts is from 6-15years.Foshan Tanfon Energy Technology Co., Ltd. is specialized in R&D, manufacturing and ... price and better technical support and service,make Tanfon energy technology Co.,Ltd as your most valuable cooperator in China. On ... Functions: Protection Against Over load, Short-Circuit, Over Heat, Anti-isolated Island Effiency, Polarity Joint-ReversedAllowed Voltage Range ...