For both the AC and DC side of a solar PV network, surge protectors use either MOV or Gas Discharge Tube technology.
May 2, 2011 - Automation Systems Interconnect releases overvoltage and lightning protection modules. For both the AC and DC side of a solar PV network, ASI surge protectors the modules use either MOV or Gas Discharge Tube technology to provide the best possible protection to all components with the solar PV power system. The ASI AC surge protection modules for solar PV installations are available for single phase 230Vac and 3 phase 230/400Vac circuits. DC surge protection modules are available with ratings of either 600Vdc or 1000Vdc. Modules are DIN rail mountable.