Is your sync time resetting your inverter time or something?
ETotal should be cumulative, it should be putting out energy produced since the day the inverter was installed. I didn’t notice when you posted a few weeks back that ETotal was also putting out zero values.
What do you have in your sync time setting for SBFspot.cfg and what time is on the inverter and what time is it trying to sync to?
Probably best to turn off time sync with sbfspot and set the correct time on your inverter.
To filter you would need to do something like this.
You need to figure out the time thing first though I think, otherwise you can’t really make the filter if you are having daily ETotal values starting at zero.