performance degradation [RE-wrenches]

Marco Mangelsdorf marco at pvthawaii.com
Wed May 11 11:19:03 PDT 2005


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We all know that crystalline Si modules experience a decrease in power
output over time.  Is this degradation a function of both a reduction of amp
output and voltage or a loss of one and not the other?  This could be an
important practical issue for systems that are designed with an operating DC
voltage on the low end of the MPPT range.  If the system is on the low end
with new out-of-the-box modules, how will the system perform in 10-20 years
if the voltage drops enough to drop below the MPPT range of the inverter or
charge controller?

aloha,
marco

Marco Mangelsdorf
President
ProVision Technologies, Inc.
69 Railroad Avenue, Suite A-7
Hilo, Hawaii 96720 USA
(808) 969-3281, fax 934-7462
www.provisiontechnologies.com



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