Annex B: Guidance On Module Temperature For Several Locations - Canadian Solar CS1V-MS Installation Manual

ANNEX B: GUIDANCE ON MODULE TEMPERATURE FOR SEVERAL LOCATIONS

 The operational temperature of a PV module changes
during the day and also from day to day throughout the
year. The 98th-percentile temperature represents the
temperature that is larger than 98% of all the
temperatures, and consequently it is met or exceeded
only 2% of the time.
 The 98th-percentile temperature is to be determined
from measurements taken on hourly-basis, or even
more frequently. For a standard year, the 98th-
percentile temperature would be met or exceeded
175.2 hours.
Figure B.1 – 98th-percentile temperature for an open-rack, or thermally unrestricted
Figure B.2 – 98th-percentile temperature for a close-roof mounted
EN-Rev IM/GN-AM-EU/2.8 Copyright © July, 2021. CSI Solar Co., Ltd.
 The operational module temperature is influenced by
the environmental temperature but also by how the
module is installed, as it may allow a more efficient
ventilation. The graphics below from IEC 63126 show
this influence.
 For Open-rack it can be seen how the 70°C are never
exceeded in any of the locations, while for parallel to
the roof mounted modules (not in-roof) this value can
be surpassed for some locations.
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