[RE-wrenches] Snail Trails Suniva OPT 270

[Dave Angelini Offgrid Solar]

About 2015 I bought some Suniva poly's that had the cracks. I talked
with an Engineer at Suniva who told me this would not affect output. I told
him that every panel I install is on the ground and would not use these
again because it is so visible when mounted on a ground mount. He said he
was sorry to hear that and did take them back. 

Totally unacceptable to me
no matter what the output is. If it went up by 30% with cracks, it would
still scare me on longevity.  

Dave Angelini Offgrid Solar
"we go where
powerlines don't"
http://members.sti.net/offgridsolar/ [1]
e-mail
offgridsolar at sti.net [2]
text 209 813 0060

On Mon, 21 Sep 2020 10:20:32
-0700, August Goers  wrote:  Interesting. We have a small commercial site
installed in 2014 with Suniva MVX255-60-5-7B1 modules exhibiting a similar
if not the same issue. See attached photos. My understanding is that the
MVX series modules were possibly manufactured on a separate line than the
OPT series that Carl shared and of course are polycrystalline rather than
mono - in other words, totally different cells. I don't know if they shared
the same encapsulant assembly materials and procedure.   Our site has 70 of
these modules, and our technician estimated the 90% of them were showing
these issues. Production still seems fine, although we don't have online
monitoring so we can't tell if it's been training off or not.   August    

On Fri, Sep 18, 2020 at 11:37 AM Jay  wrote: Hi Carl

 They look like
static bubbles, not micro cracks. 
 I've seen something like this before.


 The static has to do with how the EVA is laid down. 

 Jay

 > On Sep
18, 2020, at 8:47 AM, Carl Adams  wrote:
 > 
 > 
 > Swapping a failed SE
optimizer this AM and noticed some strange marks/patterns on several of the
modules. How concerned should I be about this? These are SUNIVA OPT 270s
installed in December 2014. Pictures attached.
 > 
 > 
 > 
 > 
 > With Kind
Regards
 > Carl Adams, President
 > SunRock Solar, LLC
 > 513.290.9072
(mobile)
 > 513.766.6025 (office)
 > 
 >
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