[RE-wrenches] Future low Vmp

[Nathan J. Stumpff]

Hi wrenches,

I used to do these kind of calcs all the time but am wicked rusty. What
assumptions do you use for future (degraded) hot temp Vmp of a PV string to
check if you will still be able to operate inside a given MPPT range?
Specifically interested in assumed yearly degradation to Vmp, assumed
actual operating cell temp, and if it is appropriate to use STC value as
the starting point and if not what would be better (NOCT?)

Thanks,
-Nathan
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