In distributed rooftop and commercial‑industrial photovoltaic power stations, transient surge over‑voltages caused by lightning induction and line switching can easily damage expensive core equipment such as inverters and PV modules. CNLONQ PV DC Surge Protector is specially developed for PV DC circuits. It provides reliable transient over‑voltage protection for the DC side of combiner boxes and inverters, reduces equipment damage risks from lightning surges, and improves the overall stability and service life of PV systems.