(i) Has anyone had experience with small solar panels using epoxy
outer material, or PET or other plastic bonded to a PCB base using EVA
adhesive.

(ii) If so, have you experienced an increased number of faults in
recent times. If you are a recent user, what sort of fault rate are
you seeing.

I may be seeing an occasional solar panel panel failure that has a
cause that I've not seen previously.
If I am correct this is caused by ongoing changes in crystalline
silicon wafers and will probably affect many manufacturers who use
this technology. This applies to many small solar panels under about 1
Watt capacity and some larger ones. PV panels likely to have this
problem are those which use an outer layer of  encapsulant such as
epoxy, or use EVA adhesive to bond a plastic like PET or Acrylic or
Polycarbonate to a PCB backing. This is less likely to affect
traditional glass/EVA/silicon panels in the same way but these may
have their own related issues.

I cannot supply any more details at present. I am still investigating
but may be able to. I may be able to comment later if I find anything
useful.
--=20
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