| Degradation type | Cause | Consequence |
| Corrosion | Moisture Penetration | Increased leakage current performance loss |
| Delamination | Loss of adhesion between the encapsulant and the cells | Increased light reflection Water penetration in the structure |
| Discoloration | UV rays combined with high temperatures and water | Decrease of the generated power |
| Hot spot | Cell shading | Energy loss transformed into heat |
| Orientation and tilt | Insufficient surface Panel sagging | False forecast Decrease of the energy capture by the modules |
| Voltage drop | High current; Low section | Energy loss |
| Joule effect | Cables heating | Energy Loss transformed into heat |
| Conversion loss | Inverter efficient | Low power loss |
| No grid | Electrical parameters not compatible with those of the grid | Open circuit operation of the PV generator |