MQHA series PV combiner box is organized as 1 to 6 inputs. It is designed to provide overcurrent and overvoltage protection to enhance the security and reliability of the inverter operating in Max. rated Voltage DC 550V and 1000V solar systems. MQHA series PV combiner box complies with CGC/GF 037:2014 standard, it is made of ABS bottom & PVC cover, waterproof grade up to IP65, and flame retardant, temperature rise, impact resistance, UV resistance, etc., will be strictly tested before goods delivery. We also can customize it according to user requirements.