It’s practical to see battery level so I can optimise the electricity price at which I charge it.

Although it wasn’t worth the cost of the 3 year subscription so I now just estimate the charge status based on the charge’s power consumption.

If the car is at 10% battery, it may be worth charging at .15 or .3€/kWh. If it’s at 70% charge, I’ll wait until the price drops to .005€/kWh. The whole thing is automated in HA.