That’s the sort of trip which puts an Ev at its limits of range, A 300 mile range vehicle would need a stop on the way back and if you can’t charge at home enough to find a charging point tomorrow.
A 30 minute stop at a rapid charger would do it.
Then add the cost saving, the nicer drive, the reduction in environmental damage.
I presume 400 miles in a day is not too often? What’s the mileage on your current car?