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RTI
o RTI usually used where the
operating temperature is well
known and fairly constant when
an appliance is operating. This
is not the case for PV.
o Modules rarely operate at
even the temperature measured
in the temperature test.
o Typical Module T40 = 90 *C
o See figure for a roof mount
module in 6 locations including
Saudi Arabia, one of the hottest
places in the world.
A module only spends a few
hours a year above the T40
temperature and never reaches
T40 + 20..
aS500
400
300
200
1000
0
40
80
Temperature ( C)
"EVALUATION OF HIGH-TEMPERATURE EXPOSURE
OF PHOTOVOLTAIC MODULES" By Kurtz etal, TBP in
Progress in PVNATIONAL RENEWABLE ENERGY LABORATORY 8
Close Roof(b
- 1T40-
- - -?a..
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Wohlgemuth, J. How Standards Control Module Design for Better or Worse, presentation, February 1, 2011; Golden, Colorado. (https://digital.library.unt.edu/ark:/67531/metadc845978/m1/8/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.