[RE-wrenches] Trina Module Annual Degradation

[boB at midnitesolar.com]

Darn  !     I must have been talking about myself !!!

I said  "short term memory"   when I mean   "short term warranty"

boB


On 7/18/2015 11:09 AM, boB at midnitesolar.com wrote:
>
> Hi Bill
>
> From what I understand, and I have asked this question to different
> people at different companies, the 25 year warranty people hear about
> concerning PV is not for a broken panel within 25 years but the
> degradation in performance over the years.
>
> If a PV module just plain old "breaks" (goes to zero output) in, say
> 20 years and it has a 25 year degradation warranty, the PV manufacturer,
> (if still in business), is not obligated to replace the defective 
> module....
> ...Even if it resulted from a factory defect.
>
> I do not know what the warranty period is for manufacturing defects.
> I hear warranty times of around 10 years.  I am not exactly sure on that
> though.
>
> Having said all this, there are companies that do replace modules after
> their short term memory is up due to manufacturing defects.
> Kyocera comes to mind immediately.  These are typically larger
> companies from what I see.
>
> I'm just repeating what I have heard over the years regarding PV.
>
> It just seems to me somewhat misleading the words "25 year warranty".
> There may be some companies that actually DO offer a full 25 yr. warranty
> these days but what if they aren't around before then ?
>
> I bet that Bill Hoffer could offer way better information than I can
> about this.
>
> boB
>
>
> On 7/18/2015 3:29 AM, solar1online at charter.net wrote:
>> boB,
>> Can you expand on the warranty coverage in this situation?
>> TIA,
>> Bill
>>
>> -----------------------------------------
>>
>> From: "boB at midnitesolar.com"
>> To: "RE-wrenches"
>> Cc:
>> Sent: Thu, 16 Jul 2015 19:01:32 -0700
>> Subject: Re: [RE-wrenches] Trina Module Annual Degradation
>>
>>
>>
>> It's too bad that when a module goes to a REAL high degradation, like,
>> 100% down to nothing
>> before that 25 year "warranty" is up, that it is NOT considered
>> degradation and is not covered
>> under "warranty".
>>
>> P.S. This has nothing to do with Trina or any PV company in particular.
>>
>> boB
>>
>> On 7/16/2015 6:24 PM, jay wrote:
>> > HI Peter,
>> >
>> > I’ll bite.
>> >
>> > From the folks I know who deal with multi mega watt systems, are 
>> seeing less than that level of degradation.
>> >
>> > That said, the standard module 25 yr warranty to 80% is just on .7% 
>> year if I have my math correct.
>> >
>> > jay
>> >
>> > peltz power
>> >
>> >
>> >
>> >
>> >> On Jul 16, 2015, at 9:08 AM, Peter Parrish 
>> <peter.parrish at calsolareng.com> wrote:
>> >>
>> >> I have recently been in discussion with a company that builds a 
>> large number
>> >> of medium-sized PV ground mount system (30 kW to over 100 kW). 
>> They claim
>> >> that they have been seeing something on the order of 0.7% annual 
>> degradation
>> >> in the output of their systems due to intrinsic degradation in the PV
>> >> modules. They also claim that this number is supported by the PV 
>> module
>> >> manufacturer. Many years ago (2007?) I remember reading a report 
>> containing
>> >> data gathered by NREL that showed the number was about 0.4%, and I 
>> thought
>> >> the number was actually decreasing over time.
>> >>
>> >> The module in question is the Trina TSM-310 (PA14.8, I believe, if 
>> it makes
>> >> any difference).
>> >>
>> >> Has anyone read anything recent about annual degradation in 
>> general or Trina
>> >> modules in particular?
>> >>
>> >> - Peter
>> >>
>> >> Peter T. Parrish, Ph.D.
>> >> President, SolarGnosis
>> >> 1107 Fair Oaks Ave. Suite 351
>> >> South Pasadena, CA 91030
>> >> NABCEP Certified PV Installer #031806-26
>> >> (323) 839-6108
>> >> petertor at pobox.com
>> >>
>> >>
>>
>> ____________
>

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