MPPT logfile shows higher PV voltages than Voc spec

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vronsky asked May 17, '23

MPPT logfile shows higher PV voltages than Voc spec

The logfile of my Bluesolar MPPT charger shows max. PV voltages that are higher that my panel's Voc spec: 23,4V.

Logged voltages go as high as 23.92V

How's this possible, can it be harmful ?

THANKS,

V.

MPPT SmartSolar pv limit

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Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

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Answer 1 · 2023-05-17T11:35:15Z

pwfarnell answered · May 17, 2023 at 11:35 AM

The VOC is given at a standard temperature, if the panels are below the standard temperature then VOC will be higher. This is normal behaviour and nothing to worry about.

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Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Alexandra ♦ commented · May 17, 2023 at 12:02 PM

You will also note on the panel specifications that there is a tolerance/variance value (some panels at +/-3%). So if at 25°C would also be within acceptable vairance.

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