The DC fuse for photovoltaic (PV) cells is specifically engineered for use in PV systems, primarily to protect solar panels. Its tripping condition is designed to effectively isolate a faulty PV module without disrupting the operation of other normally functioning solar panels. The PV-series DC fuse ensures safe protection of PV modules and their conductors against reverse overload currents, regardless of whether the DC power supply is compromised. With the growing market demand for high-power solar panel arrays, along with the ongoing advancement and deployment of PV systems and wind-power grid-connected generation technologies, the use of high-voltage DC fuses to safeguard the secure grid-connected operation of PV systems has become a key technical measure internationally.