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 <[email protected]>
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
[email protected]
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