@dartiss Hmm... I'm surprised you have CCS but only get 7kw charging. That seems odd.
In my experience the most expensive chargers are the equivalent of petrol. So worst case scenario is your no worse off.
BUuuuutt, there's so many variables. Petrol price, electric price, EV efficiency. To be honest, I’d try not to think about it too much. Charge when you can. Use petrol when you can’t.