[RE-wrenches] Trina Module Annual Degradation

[boB at midnitesolar.com]

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
>>
>>