I have a few ratty old vehicles at my home, and ANY of them can go over 1200 miles in a day and they all have over 100k miles on them.
That, in a nutshell, is the problem with rechargeable electric cars. Range. Internal combustion cars can basically run until the wheels fall off -- a four-seat car with four drivers in shifts, you can drive 24/7 indefinitely.
1200 miles in a day is a bit of a stretch -- that's a 50mph average for 24 straight hours, factoring in all stops. Sounds like a reality show. But 800-900 miles per day is not unreasonable.
Electric cars are in-town cars. Period. You wouldn't want to take one on vacation. They're not set up for a road trip. Unless there is a way you could pull off the highway and swap a fading battery pack for a fresh one, like you can a propane tank.