[pvusers] Delamination of Siemens M55 modules

[Rudolf Minder <rudolf.minder@bluewin.ch>]

Thanks for your comments.
The reason for my posting was that I am responsible for the R+D
aspects of a 500 kW plant equipped with 10'560  M55 modules, now
operating since 10 years. The plant is located in the Jura mountains
in a rather cold environment. It performs well with a performance
ratio of typically close to 0.8. We recently measured all 440 string
currents and only found 1 (one) defective module out of 10560.
That's quite good for a 10 yrs old plant I guess.
Up to now we did not see major delamination effects in
this plant, just a few isolated small spots.
The problem is that I heard from another M55 installation of similar age
that apparently shows major signs of delamination which in my opinion
will reduce the life of such modules drastically. I just would like to
collect some info on this problem in order to judge the risk for the
remaining life of our plant. Of course I hope that the reported
problems are related to a particular production batch and not a
general M55 problem...
Rudolf

--
Minder Energy Consulting
Dr. Rudolf Minder
Ruchweid 22,  CH-8917 Oberlunkhofen, Switzerland
Tel +41 (0)56 640 14 64,  Fax +41 (0)56 640 14 62


--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*
  List sponsored by CREST/REPP  
	http://solstice.crest.org/   http://www.repp.org/