Yueqing Sandi Electric Co.,Ltd is one of the leading China string combiner box manufacturers,Website: , welcome to wholesale cheap string combiner box from our professional factory. Technical Parameters: Type Designation PVB-2 PVB-4 PVB-5 PVB-6 Max. PV Array Input String 2 4 5 6 Max. PV Array Voltage 400Vdc Rated Current for Each String (Replaceable) 10A/15A 10A/15A 10A/15A 10A/15A Output Terminal Type PG21 Rated Output Current 20A/30A 40A/60A 50A/75A 60A/90A Input cable waterproof connector PG (4mm PV cable) Output cable waterproof connector PG21 Output DC Circuit Breaker Yes PV special lightning protection module Yes Anti-reverse module protection Optional Protection Degree IP45 Environment Temperature －25～+60℃ Environment Humidity ＜90% No condensation Altitude ≤3000m Installation: indoors Indoor/outdoor Box material ABS plastic box Picture