In spite of the high lightning risk that many PV installations are exposed to, they can be protected by the application of DC SPDs and a properly engineered lightning protection system. Effective DC SPD implementation should include the following considerations:
•Correct placement in the system
•Termination requirements
•Proper grounding and bonding of the equipment-ground system
•Discharge rating
•Voltage protection level
•Suitability for the system in question, including dc versus ac applications
•Failure mode
•Local and remote status indication
•Easily replaceable modules
•Normal system function should be unaffected, specifically on non-power systems
