Yes I think you have seen similar issues, when the estimates of consumption or solar are off it can cause grid usage. My system has just started pulling from Grid as the clouds have come over and where it forcasted solar there is now none… even though the battery has plenty at 53%
I think the EV and heat pump loads are throwing it off somewhat.
These 2 other posts seem similar:
Cheers for the pointers, at least I know its working as well as can be expected for the time being.