MAIN PURPOSE: 500V solar photovoltaic DC combiner box, installed between the solar panel and the solar inverter, with 1 string input and output. EXCELLENT PARTS: Equipped with reliable DC components for maximum protection of PV DC disconnect switch, transparent cover for easy detection of circuit breaker status. GOOD PROTECTION: With overvoltage, overload, and thunder protection function, capable of long distance comm and extending the working life of solar system. APPLICABLE CABLE: This DC disconnect switch supports plug and play, suitable for cables with a diameter of 4-6mm, 13-10 AWG cables, and 4-6mm² cables. WIDE APPLICATION: Suitable for photovoltaic solar panel grid connected system, solar off grid system, solar power generation system, photovoltaic array, etc.