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, b...@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, solar1onl...@charter.net wrote:
boB,
Can you expand on the warranty coverage in this situation?
TIA,
Bill
-----------------------------------------
From: "b...@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.parr...@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
>> peter...@pobox.com
>>
>>
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