An individual heated module can have several root causes, including an open circuit resulting from loose connections, shading objects that activate all three diodes, or a specific junction box defect. There may also be claimable product defects causing current leaks, particularly in wet or humid conditions. These product defects can be linked to various module components (frame, cell, back sheet), which often lead to water ingress and low RISO values.
Visual inspection of the electrical components/connections
Check wiring for loose, frayed or damaged cables
Check DC string connecter for disconnection, burn marks or damage.
Check Junction Box for signs of overheating, burn marks, or moisture ingress.
Visual inspection of the module components (if none of the above)
Check the front side of the module (frame and cells) for evidence listed on the Visual Inspection Checklist table
Check the back side of the module (backsheet) for evidence listed on the Visual Inspection Checklist table
Module Serial Number collection
Offline strings can have several root causes, including open circuits resulting from loose connections or damaged cables, shading objects, missing or damaged modules. There may also be claimable product defects causing current leaks, particularly in wet or humid conditions. These product defects can be linked to various module components (frame, cell, back sheet), which often lead to water ingress and low RISO values causing the full string to trip.
Visual inspection of the electrical components/connections
Check wiring for loose, frayed or damaged cables
Check DC string connecter for disconnection, burn marks or damage.
Check Junction Box for signs of overheating, burn marks, or moisture ingress.
Visual inspection of the module components (if none of the above)
Check the front side of the module (frame and cells) for evidence listed on the Visual Inspection Checklist table
Check the back side of the module (backsheet) for evidence listed on the Visual Inspection Checklist table
Module Serial Number collection
Please ensure you follow all requisite Health & Safety guidance and protocols before carrying out any work on site.
Hot Spots or Multiple Hot Cells can have different performance impacts on the modules, typically linked with temperate gradient. For those modules identified without a root cause associated (not seen in the drone footage), it is important to proceed with field investigation as some of the modules may be eligible for a Warranty Claim (typically those with Dtn >20ºC without an obvious impact damage) or in a worse scenario, presenting a HSE risk, due to higher Dtn.
Visual inspection the surroundings for any shading object not picked up by the Drone
Visual inspection of the module for obvious damage (if not the above)
Check for any apparent impact damage, shattered or cracked glass
Module replacement
Visual inspection of the module’s components (if none of the above)
Check the front side of the module (frame and cells) for evidence listed on the Visual Inspection Checklist table
Check the back side of the module (back sheet) for evidence listed on the Visual Inspection Checklist table
Hand-held thermal inspection to confirm if the anomaly persists (if none of the above)
Front side of the module
Module Serial Number collection
Please ensure you follow all requisite Health & Safety guidance and protocols before carrying out any work on site.