sorry to bug you again. But there is an issue related to the BMV700 I can’t figure out. We use BYD B-Boxes with 7.5kWh, Multiplus 48/3000, MPPT 250/85 and a BMV700.
But for some reason at some sites the shown SoC suddenly drifts of, showing way too high %-values, whilst the Ah-Counter is about right all the time.
site 1 showing: -76 Ah used of 150Ah -> 52,8 %
site 2 showing: -106 Ah used of 150Ah -> 52,9 %
My BMV settings (on v3.08):
04: 10 min
On sites with Victron LiFePO4 batts i've never seen this drift so far.
In the meantime I solved the problem by calculating the SoC myself via modbus extracted data, but I still don’t know what causes the BMV behaviour. Anyone any idea?