For solar racking inspection after a storm, arrange safe access and electrical isolation first. Then record the structure, joints, clamps, fasteners, foundations, roof and bonding condition before planning repairs. Finish with a traceable release record. Panels remaining in place do not establish that their supports are fit to return to service.
An array can look orderly from the access road while a connection has shifted underneath it. A ballast support can move and come to rest. A rail splice can look continuous while its position no longer matches the installation record. Inspection should establish what changed, where it changed and who will decide the next action.
This checklist is an inspection record framework. It does not give a new torque schedule, displacement tolerance or structural acceptance limit. The approved project drawings, applicable manufacturer instructions and responsible engineering decisions remain the basis for repair and release. A photograph supports that process; it does not replace it.
Before the ten checks: electrical safety and access
Have qualified electrical personnel establish the site's electrical safety arrangements before anyone approaches damaged equipment. Establish controlled access and follow the applicable shutdown, isolation and lockout procedure. Turning off an inverter does not establish that every PV conductor is safe to touch. This article does not describe electrical testing or switching methods.
Keep people away from unstable modules, damaged roofing and loose structural components. Inspect from a safe position first. Arrange roof access and fall protection through the site's competent personnel. Do not use mounting rails as walking surfaces or improvised anchorages. Where reaching an item would expose the inspector to a hazard, record that limitation and arrange an appropriate method instead.
Record conditions before repair whenever it is safe to do so. Necessary action to control an immediate hazard takes priority over photography. In that situation, record what was moved or made safe, by whom and why, as soon as practicable. Evidence preservation should never delay an urgent safety measure.
1. Record changes in row position and module plane
Start with the overall arrangement. Use existing survey points, installation photographs and approved drawings to identify a row that appears displaced, twisted or uneven. Compare like positions. An apparent change seen from a different camera angle is a reason to investigate, not a measured displacement.
Take an overview that identifies the row and a closer view of the suspect location. Include a stable reference where one exists. Record whether the observation concerns the complete table, an individual support or a module relative to its neighbouring modules. Those observations lead to different investigations.
Do not pull a row back into line to make the inspection photograph look tidy. Preserve the condition for assessment unless an immediate hazard requires intervention. A changed structural position calls for review by the responsible structural engineer before the affected area is released. The review should establish the cause, the affected extent and the repair requirements.
2. Compare rail joints with the intended arrangement
Examine accessible rail splices and expansion joints against the relevant installation detail. Record a change in gap, connector position, fastener seating or engagement. Some gaps are intentional. Their presence alone does not prove that a joint has slipped, and closing them can interfere with intended movement.
Photograph the joint from an angle that shows both rail ends and the connecting component. Identify the joint type and location. If the baseline dimension is unavailable, state that it is unavailable rather than choosing a convenient gap from a neighbouring row.
Check whether cables or bonding jumpers crossing the joint appear stretched, trapped or displaced. Refer electrical concerns to qualified electrical personnel. A mechanical repair decision should account for everything crossing the connection, not just the visible rail ends.
3. Identify deformation and coating damage
Look for bent members, local buckling, cracked connections and contact marks suggesting that components have struck or rubbed against one another. Record the member identifier and whether the condition is at a hole, cut edge, support or free span. Keep the structural observation separate from the surface observation.
A damaged coating does not, by itself, quantify lost structural capacity. Equally, a member with a clean surface can still be bent or displaced. Note the substrate and coating specified in the project records. Do not identify the alloy or coating composition from colour in a photograph.
For a coated steel component, record the location and extent of visible damage and refer treatment to the applicable product and coating instructions. Do not promise that an exposed area will repair itself. Avoid straightening, drilling or coating over the evidence before the responsible party has determined an acceptable repair.
4. Check whether module clamps have moved
Examine accessible end and mid clamps for changed position, incomplete seating and damage to the adjoining module frame or support. Compare the observed assembly with the approved module clamping arrangement. A clamp remaining on a rail is not enough if its contact with the module has changed.
Record both sides of a shared connection where access permits. Identify the module model and clamp type from records, rather than assuming all rows use the same combination. A replacement module or clamp introduced during earlier maintenance can matter to the assessment.
Do not slide a clamp back into position and treat its previous test result as proof of the repaired connection. Damage, altered contact and changes in the supporting roof interface require evaluation. The module manufacturer's permitted clamping arrangement and the selected mounting system must be assessed together.
5. Arrange the specified fastener inspection
Have trained personnel inspect fasteners using the method and equipment specified for the actual assembly. Obtain the applicable installation manual, revision and joint schedule before choosing a torque value or audit method. Record missing documentation as an unresolved item. A value from a different clamp is not a substitute.
Record the joint location, component identification, specified requirement, tool identification and observed result. Distinguish an inspection from an adjustment. A record saying only that every bolt was tightened loses the information needed to understand what was found and what work followed.
Do not assume that applying a wrench until it clicks measures the original bolt preload. Torque, friction and the approved checking method all matter. Where the manual does not define the audit method, sampling extent or treatment of a suspect joint, obtain written direction from the manufacturer or responsible engineer. This checklist does not supply those missing instructions.
A laboratory example shows why conditions must stay attached to a number. SR-CKZ was tested by SGS, report XMIN2511003489ML01_EN, 2025. It records a maximum force of 2.71 kN; the setup photograph identifies 15 N·m installation torque. The report does not establish that result for other installation conditions or a storm-damaged assembly. Its torque annotation is not a general field re-tightening instruction.
Fastener identification also belongs in the record. Match markings and procurement records to the approved specification. Do not infer strength class from the appearance of stainless steel, or replace a fastener grade on the assumption that a different alloy automatically gives an equivalent connection. Record unusual corrosion, damaged threads, missing components or changed washer arrangements for assessment.
6. Check ballast positions and supporting surfaces
For a ballasted flat-roof array, compare each inspected support with its recorded location and the approved ballast layout. Note displaced blocks, cracks, damaged trays, changed bearing contact and disturbance to the protective layer below. Record the relationship between the support and the roof, not merely whether a block is still present.
A shifted block must not be pushed back and signed off solely because the array then resembles the drawing. The cause of movement, possible damage and the effect on the load path need engineering review. The supporting roof and waterproofing may also require assessment by the responsible specialist.
Keep ballast identity, position and any available commissioning photograph together in the record. A photograph of an isolated block without its row reference is difficult to use later. The flat-roof foundation comparison provides background on different load paths; its worked examples are not a release calculation for the inspected array.
7. Record pile movement and changes around the ground support
For ground-mounted arrays, inspect accessible pile heads and the surrounding ground from safe locations. Record apparent uplift, tilt, settlement, erosion, exposed foundations and standing water. Compare with the installation survey and earlier inspection records where available.
Identify whether a visible mark was an installation reference, a later maintenance mark or an unknown feature. A paint line alone does not establish the embedded length of a pile. Record the difference between observed conditions and conclusions that still need survey or geotechnical input.
Do not drive, pull or pack a moved pile back into place as an inspection adjustment. Refer movement of a foundation to the responsible structural engineer, with geotechnical support as required. A historical pull-out value from another location cannot establish the remaining resistance of the disturbed support. Keep the affected area out of the release scope until the required assessment and corrective work are complete.
8. Inspect the roof interface as well as the bracket
On metal roofs, record visible deformation at the seam or sheet around the attachment, signs of clamp movement and damage to associated roofing details. On tiled roofs, note displaced or cracked tiles near hook locations. Record suspected leakage and changes to flashing or sealing details without assuming the bracket is the sole cause.
Our standing-seam clamp article explains why the roof profile matters to a roof-clamp connection. This is a different connection from the module clamps discussed above. Follow the load path into the roof construction. A clamp can remain intact while a seam, sheet connection or supporting element has been affected. Ask the responsible roofing specialist to assess concerns beyond the mounting component itself.
For a system using BL600 clamps and RH4 rails, our maintenance article provides product context. It does not extend that arrangement's instructions to a different roof clamp. The current installation details for the actual system and roof remain necessary.
9. Have the bonding path reassessed
Record visible damage to bonding jumpers, grounding lugs and conductors, particularly where structural movement occurred. Arrange reassessment and any required continuity testing by qualified electrical personnel using the project's applicable requirements. A complete-looking metal connection does not establish an acceptable electrical path.
Keep mechanical repairs and electrical follow-up linked in the same location record. Replacing a clamp, rail section or washer may affect a connection that also performs a bonding function. Identify that function before selecting replacement parts.
The grounding and bonding article explains the distinction between structural joints and intentionally designed electrical connections. This checklist does not adopt its numerical examples as field acceptance thresholds and does not prescribe a test method. Record the qualified person's result and the basis for acceptance separately from the visual inspection.
10. Build the release record before signing
Create a record that another person can trace from the site plan to the observation, decision and completed action. Include the storm date, inspection date, inspected locations, photographs, inaccessible areas, applicable drawing and manual revisions, fastener audit records and the people responsible for each assessment.
Where weather information is relevant, record the weather station, reported quantity, observation time and source. Ask the project engineer to determine how that information relates to the design basis. A station's reported gust and a project's design wind input should not be compared as if their definitions and exposure were automatically identical.
Give each unresolved item an owner and a next action. Separate inspected and accepted areas from areas awaiting access, assessment, repair or retesting. Keep before-and-after evidence and the authorization for each repair. A completed checklist with unresolved findings is an inspection record, not a blanket release.
Structural displacement, movement of a pile or movement of ballast from its intended position should trigger structural engineering review of the affected area. Broader electrical, roofing and operational release decisions belong with their responsible specialists. The final sign-off should state its scope and any remaining restrictions plainly.