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CEC rule 64-202 2) doesn't specify what minimum temperature to use, but I noticed the notes clarify this:
The lowest daily minimum temperature described in this Subrule is available from Environment and Climate Change Canada, "Canadian Climate Normals".
The daily minimums are a "normal" minimum, not an extreme minimum.
For YHZ, the January "daily minimum" to use with 64-202 is -10.4C, not the "extreme minimum" of -28.5C.
For the CSI CS3W panels I have on my garage, the TC is .27%/C. .27%/C * 35.4C = 9.558%, which is a much more reasonable correction than the default 25% specified in the CEC when the panel TC is unknown.
The lowest daily minimum temperature described in this Subrule is available from Environment and Climate Change Canada, "Canadian Climate Normals".
The daily minimums are a "normal" minimum, not an extreme minimum.
For YHZ, the January "daily minimum" to use with 64-202 is -10.4C, not the "extreme minimum" of -28.5C.
For the CSI CS3W panels I have on my garage, the TC is .27%/C. .27%/C * 35.4C = 9.558%, which is a much more reasonable correction than the default 25% specified in the CEC when the panel TC is unknown.