That is one massive setup. And amazed that you can use so much of the energy of the solar panels. Okay an EV does help.
We did buy a plugin battery last month (2.7 kwh) and I am trying to calculate it return, which is pretty hard because I do need to collect the energy price per 15 minutes (we do have a dynamic energy contract, so each 15 minutes we do have a different price). I am pretty sure that will buy an second one this year.
Our solar panels will become 15 years this year. It only has a max of 3.8 which was massive 15 years ago, but is a joke these days. That's why we did cap our EV charging station to only 4.7kwh.