I have had two s340s mounted for 200 days. The solar panels have delaminated and no longer charge. I have replaced the panels with new ones and the s340s are charging again. I have two s220s which have been up longer and their built in solar panels are fine. I have seen a few mentions on here of delamination, what are peoples experiences ?
I ought to point out I live near the sea and leave the rain to clean the panels.
The solar panels are known to do that. If it’s still under warranty they should replace them. Otherwise you can try to peel the lamination off and continue to use them
My S340 which I have had since it came out has done this, BUT it still charges the same as when it was brand new. For mine it is just cosmetic
If you are concerned about the problem, you can contact Eufy support.
No I’m fine thanks. It is just the appearance is no longer perfect but both the sun 
and I don’t worry about looks any more 
Eufy are sending me some replacements. The old ones didn’t charge any more but would pass the wiring test in the setup. I had already bought two of the bigger 3v panels so will keep the new ones as backup.