PV panel degradation [RE-wrenches]

Darryl Thayer daryl_solar at yahoo.com
Mon Sep 15 22:06:19 PDT 2003


Hi Keith 
I have a system that was in operation and monitored
for almost 10 years.  The whole array of Mobil
polycrystalline panels, of almost 100 panels lost just
under 1% per year.  The loss was so small that it took
several years to verify the loss.
Daryl

--- keith <kcronin at lava.net> wrote:
> 
> Hi
> Does anyone have historical data on pv panel
> degradation?  Is it safe to
> say it is ½ to 1% per year?
> 
> Shouldn’t this be factored into the purchase, from a
> potential client’s
> perspective? Let’s say a 150 watt panel
> hypothetically only puts out 120
> watts real world, would it be a 1% degradation to
> get to the 25 year
> warranty?
> Thanks for the feedback!
> 
> Keith Cronin
> 
> President
> Island Energy Solutions
> 318A Kuulei Rd
> Kailua, HI 96734
> 808-262-3268 Tel
> 808-263-0338 Fax
> www.islandenergy.net


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