Ah yes, understand what you have done there.
I am just judging it on a day to day basis ATM. If the sun has charged my battery to full before 1pm, I just tun on battery charge when cooking so that I cook on solar/cheap electric, then turn everything back to ECO afterwards.
As long as the battery is nearly full at 7pm ready for the cold evenings, I am happy. Already my heat pump is starting to run almost all day to keep the house warm, but it's not using much electricity as yet. I'm sure that will change with the weather though, and that second charge will become more essential!