China Aidun Electrical produce “SOLARSON” brand SST40-1000 1000V DC surge protective device Type II 3P (DC SPD) are used for solar PV system. Product description Surge protective device, protect against lightning surge voltages in solar system (photovoltaicpower supply system).These units must be installed in parallel on the dc networks to be protected and provide commonand different modes protection. Its installed location are recommended at both ends of the dc power supply line (solar panel side and inverter/converter side), especially if the line routing isexternal and long.High energy MOVs equipped with specific thermal disconnectors and related failure indicators.This product accourding to IEC66143-1/EN61643-11. Yueqing Aidun Electric Co.,Ltd Add:Daidong Industrial Zone,Liushi Wenzhou,Zhejiang,325604,China contact: Brynn Lee Mobile: +86 15172449680 (24H) QQ:501735404 Wechat&what'sApp:+86 15172449680