This is the voltage of one of the long strings on startup in the morning.
You can see the MPPT trying to start as the voltage rises but with no power available, max voltage is about 424V then it actually manages to start making power and pulls the voltage down to 260-270V which is the max-power point at this time.
It's this time of day where the greatest risk to the MPPT maximum input voltage occurs. This is a major issue for those in the "cooler" parts of the world as Voc rises by about 0.4% per degree C below 25C (where it is specified). Even in Thailand a chilly, 15C, morning would raise Voc by 4%.
You wouldn't choose them on the basis of tattoos obviously or even exclude them if one surprisingly turned up.But the vast majority of doctors, lawyers don't have them.
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