The presented fire safety switch is designed to enhance the safety of solar power systems in both residential and commercial settings. As a four-chain version model, it can manage four independent strings of photovoltaic modules, ensuring comprehensive coverage for larger installations. In the event of an AC power outage on the side of the distribution network, this device acts swiftly to halt DC power flow within the system. This critical feature aids in safeguarding firefighting operations by preventing solar cables that traverse the building from remaining energized during anomalies.

The device operates in compliance with globally standardized firefighting procedures, ensuring its effectiveness and compatibility with international safety protocols. Its primary function is to automatically sever the DC circuit during a fire or grid failure, thereby eliminating the risk of live cables within the affected structure. The integration of an AC power supply means that any interruption at the building's main switchboard triggers an automatic disconnection of DC power from the inverter. Conversely, the restoration of AC power will reactivate the DC circuit. The product carries the identifier 5905515606301 and is engineered to work seamlessly with Foxess systems, specifically the S-Box_Plus model.