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besterwillem asked

SmartSolar MPPT 250/100 Firmware V1.59 Voltage discrepancy?

20220806-104124.jpgscreenshot-20220806-104048.jpgHi all, I have a smartsolar mppt 250/100 with latest firmware v1.59, recently I noticed my mppt sitting at absorption phase way to early in the day, as in NZ we are now mid/late winter with long days of rain with no sun and consumption is higher than yield most days, on further investigations, I noticed that via the victronconnect app the Smartsolar mppt 250/100 is reading a battery voltage of 27.46v and the actual battery reading when measured with my multimeter is 25.46v on my 24v system, I measured this at the smartsolar mppt's battery terminals as well as at the battery terminals, the BMV700 also confirms the 25.46v. So my thinking is with the current firmware revision v1.59 there seems to be a calibration issue or something else software related, has anyone20220806-104204.jpg else experienced/fixed this type of issue?

MPPT Controllers
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Paul B avatar image
Paul B answered ·

If you have a ve direct cable connected to your GX unit from the smartsolar and the BMV then turn DVCC on

or if no GX unit then get a bluetooth donlge for your BMV700 connect the bluetooth network between the bmv and the smartsolar and then I think it will use the BMV as the primary voltage reference point.


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