Optical Storage Solution(Rapid Shutdown): Use an inverter to convert DC, control battery charge or discharge period, and balance the requirement of local loads. According to the safety requirements, install PV rapid shutdown device between PV modules and inverter, which can quickly cut off the DC high voltage among modules, the high dc voltage between photovoltaic module and grid-connected inverter,In the vicinity of the inverter, it is necessary to install (internal/external) isolatior to quickly turn off the inverter. The battery can convert excess ac into direct current for storage, and then convert it into alternating current for discharge when the power is insufficient, and the charging and discharging processes need to be protected. Non-polarity miniature circuit breaker can realize bidirectional protection of cable.