CIRCUIT PROTECTION: With overvoltage, overload, and thunder protection function, capable of long distance comm, and has a long service life. HIGH RELIABILITY: Equipped with reliable DC components to protect the PV disconnect switch, transparent cover for easy checking of the breaker status. WIDE APPLICATION: This photovoltaic disconnect switch is suitable for photovoltaic solar panel on and off grid systems, solar power generation systems, RVs, etc. MAIN PURPOSE: 500V solar photovoltaic DC disconnect switch combiner box, installed between solar panels and solar inverters, plug and play. IP65 WATERPROOF: This combiner box has an IP65 waterproof grade, allowing for indoor and outdoor installation, can be used in harsh weather environments.