This product can connect up to 4 photovoltaic panel type inverters, with circuit breaker input for incoming lines and circuit breaker or load isolation switch for output. After busbar convergence, it adopts secondary lightning protection. The maximum rated voltage of the system is 690V AC, and the protection level is IP65 at the same level as the inverter. This product simplifies the wiring between the string inverter and the AC distribution cabinet or step-up transformer, and can adapt to various harsh environments. In addition to standard materials and sizes, customization can be made according to user requirements