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<p>Wrenches,
<br>
<br>
At a couple 7-10 year old installs (both are
top-of-pole) of Mitsu 170's I've spotted several "bubbled"
backsheets. At one install the output is 40% less than it should
be (accounting for age, dust, sun angle, etc). They are all small,
biggest being 3/16" X 5/8", some just bubbled, a couple have
actually caused the backsheet to split open a little. Its
uncertain whether I can see any discoloration through the glass
side and the backsheets are black so its impossible to tell if it
"burned" through from it darkening the backsheet from a bad solder
joint or whatever. These are not impact dings, they are all the
same shape, they are 6 to 12 feet off the ground. One example pic
attached.
<br>
<br>
I called Mitsubishi in San Diego (Jim) and he said he
has NEVER seen anything like this, plus does not have any 170's to
replace these. Any body else seen anything like this? and/or have
any 170's. I might consider buying someone's dusty 170's because
the installs are top-of pole and the 225's they're considering for
replacement (even though "free" ala warranty) would be a
significant/major hassle to make fit. May need 4 PVs, I need to
go back and thoroughly check array.
<br>
<br>
Bill
<br>
<br>
Feather River Solar Electric
<br>
Bill Battagin, Owner
<br>
4291 Nelson St.
<br>
Taylorsville, CA 95983
<br>
530.284.7849
<br>
CA Lic 874049
<br>
<a class="moz-txt-link-abbreviated" href="http://www.frenergy.net">www.frenergy.net</a></p>
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