IEC-60904-5 › Photovoltaic devices - Part 5: Determination of the equivalent cell temperature (ECT) of photovoltaic (PV) devices by the open-circuit voltage method
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IEC 60904-5:2011+AMD1:2022 describes the preferred method for determining the equivalent cell temperature (ECT) of PV devices (cells, modules and arrays of one type of module), for the purposes of comparing their thermal characteristics, determining NOCT (nominal operating cell temperature) and translating measured I-V characteristics to other temperatures. The main technical changes with regard to the previous edition are as follows:
- added method on how to extract the input parameters;
- rewritten method on how to calculate ECT;
- reworked formulae to be in line with IEC 60891.
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27.160 (Solar energy engineering Including photovoltaic energy systems)
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Document Number
IEC 60904-5 Ed. 2.1 b:2022
Revision Level
EDITION 2.1
Status
Current
Publication Date
Nov. 1, 2022
Committee Number
82