There should be no cracking, cuts, or other damage.Also inspect the outside of the module junction box, making sure there are no bulges, cracking, or other defects.
Even if evidence of leaks isn’t present, these defects are sure to cause problems in the future, and should be promptly corrected.Some of the hazards present with solar PV arrays include: The purpose of this section is to gain a good understanding of the current condition of the racking attachment methods, racking, and modules.Because the failure of any part of the mechanical system can be caused by a single factor, it is often useful to work through the mechanical system from “top to bottom,” starting at the connection to the roof or ground.Other racking systems may use clips that rely on friction for their holding power.In either case, make sure that all connection points are secure, and free of corrosion.The solar panel modules themselves should be carefully inspected.
Some common problems include cracked glass, bent aluminum frames (if not a frameless module), or major scratches on the front of solar panel modules.
For this reason, use of stainless steel racking hardware is highly encouraged.
It is also important to ensure that the screws nuts are properly tightened.
Any solar electric system may have a number of potential hazards present.
Before working on these systems, each person should have proper training to recognize these hazards, have proper equipment to protect against such hazards, and have a safety plan.
Inspect the racking for any bending, cuts, cracks, or other defects.