Lightning strikes create magnetic fields that induce surges in live wires up to 2 km from the lightning strike. These overvoltages occur in both the AC and DC lines and are a very big threat to the PV system’s inverter, as the overvoltages are quite sufficient to knock out the entire unit. To protect the inverter, it is important that all lines, both AC, DC and any data lines, which are connected to the inverter are equipped with surge protection. All surge protectors must be installed as close to the inverter as possible. For the AC side, V20, E 52 737 10, or E 52 737 12 is used, which is equipped with a potential-free changing remote signal for monitoring. For the DC side, V20 is selected based on the maximum operating voltage of the inverter, 600V, 1000V or 1500V. All models are available both with and without remote signal.
