They are designed to absorb and discharge sudden high-energy surge currents, limiting overvoltages within the system to below the insulation withstand level of equipment, thereby protecting PV modules, inverters, controllers, and other devices from impact. Solar panel protection devices play a vital role in ensuring longevity, safety, and optimal performance by preventing damage from surges, faults, and environmental factors. A survey of industry professionals revealed that the major causes of device failures are overvoltage and. What protection devices are used with photovoltaic cells? When it comes to keeping photovoltaic (PV) systems running safely and efficiently, protection devices are the unsung heroes. Its core function is to protect sensitive electronic equipment from transient overvoltages (surges) caused by lightning strikes, switching operations, or other electrical disturbances. Why Do Solar PV Power Systems Need Protection? Solar panel protection prevents damage to photovoltaic.