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What cause delamination in a solar panel?

Delamination occurs when the bond between the plastics (on the back) and the glass (on the front) separate. This is problematic for a solar panel because it allows air and moisture to creep inside which will cause corrosion and imminent failure.

Delamination will occur if:

  1. Inferior plastics are used or
  2. If the thermal properties of the plastics are poorly understood so it doesn’t melt to exactly the right point or
  3. The plastics or the glass are not perfectly clean and compatible or
  4. The laminating machine is inferior and poorly regulated for pressure and temperature

Bubbles, creases or imperfections on the plastic rear surface are an indication of the workmanship in lamination and can be an early sign of delamination.