Meba Solar PV DC Combination Box is added between PV system modules and inverters. PowerSA-SUNio provides perfect solutions to satisfy the demands of convenience installation of large-scale PV grid-connected system modules, simple maintenance and high reliability. It converges the solar cell array which is cascaded by the same specification PV array according to the range of inverter’s DC input voltage. The serial current is accurately measured, and then output through lightning protection and circuit breaker. PowerSA-SUNio meets the needs of easy and fast connection and maintenance, and high reliability. It sets alarm accuratly and locates failure semultaneous, PowerSA-SUNio measures the voltage and cell temperature of PV array, and monitors the status of lightning protection and output circuit breaker, which is a great help to remote diagnosis of running status of PV array.