Surge Protection Devices (SPDs) are among the most crucial safety components in solar and electrical systems. Their task is to protect the inverter, battery, and the entire electrical network from sudden voltage spikes in the event of lightning or mains overvoltage. SPDs safely divert excess energy to the ground, preventing equipment damage and potential fires.

Modern surge protection operates on multiple levels: DC-side arresters protect the solar panels and the inverter input, while AC-side devices protect the household electrical network. Most models are available in 1-, 2-, or 3-pole versions and are compatible with both single- and three-phase systems. The use of quality surge protection devices is not only recommended but often mandatory for safe solar installations.