The larger stack has stored it all and given us the confidence to leave the grid charge button switched off on the hybrid inverter. I know for sure that I'd have been tapping the grid by now in smaller stack times.
We are averaging 0.75kWh per day from grid and most of that is down to us. At 07.30hrs today in cloud cover we have 1.5kW incoming and 39% soc. The HWT is fully charged and there are 70 miles on EV.
Having run through the house multiple times over the years to reduce power we are now in a magic place. Just coming up to our 6 yr anniversary since first panels installed.

The bigger battery though, absolutely pivotal in this endeavor.