Another reason to get an external meter to measure solar production. My SmartShunt results and my Victron 150/45 results are not matching each other.
Smartshunt says the lowest discharge I had yesterday was 233 AH from my batteries.
Today I got home from work and the batteries still showed ~ 80 AH deficiency from the day's production (cloudy day with possible rain). So 233 - 80 = 153AH went into the batteries.
If I take the high side battery voltage at 27V, 153AH is 4.131KWh.
Victron app for the 150/45 says I made 3.29 KWh for my one PV bank. That leaves 0.841 KWh for my other two PV arrays.
The other two PV arrays add up to just over half that of the first array (PV1 = 1.5KW, PV2+PV3= 1KW). All are flat mounted, all are similar sized.
I would have expected array PV2 and PV3 combined to generate at least half again as much as the first bank (that's what they used to do).
3.29/2 = ~ 1.6 KWh should have been produced vs 0.841 KWh actual.
Something isn't right - actually I just realized I didn't take into account my constant 125W load from my inverter. X 6 hours = 750W in the daylight that isn't going through the smart shunt. I guess that explains it. Had to type it up here to realize it.
Still, would be nice to have meter for solar production.
