PV Charging System for Remote Area Operations Page: 5 of 10
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DE-FG36-06GO86075
PV Charging System for Remote Area Operations
Argon ST, Inc.
Peak Power Trackers
Two fundamental external influences affect the solar panel power output; temperature and
solar insolation. Under ideal conditions the solar panel will convert a portion of the
available energy based on the solar cell efficiency alone. The efficiency, however is
directly affected by the cell operating temperature which causes the peak power point
(green line) to shift to the left or right and the solar panel output to increase or decrease.
Insolation changes cause a minor shift in the peak power point. It is desirable to maintain
the solar panel operating point at the maximum power point, i.e. the peak of the green line,
throughout temperature swings and changes in insolation. The impedance matching
requires control circuitry that monitors the peak power point and adjusts the amount of
power drawn from the panel to maintain the optimal operating point, thus maximizes
conversion efficiency.A very low tare load peak power tracker is required to
efficiency. Low tare power can be achieve by using low
down the energy collection electronics at niqht.140
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40
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21V 26V 31V 27V 42V 47V 52V
Typical I-V and V Cr ne 2 VCurne M Power a[
Arry Pr~,~eer P-VCu.r.e 200 -1000 Wnm2 25C and 50C 25C [o 50Cmaximize the energy conversion
power draw circuitry and shuttingID1 1 14
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Ilsemann, Frederick & Thompson, Roger. PV Charging System for Remote Area Operations, report, July 31, 2008; United States. (https://digital.library.unt.edu/ark:/67531/metadc893005/m1/5/: accessed April 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.