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.
Then again, a lot of things started out that way. Until someone like Ford came along and put the automobile within reach of the average consumer, those were novelties as well. Infrastructure development (gas stations) followed the consumer demand based on expanded use of automobiles by private citizens.
I said THEY could; not me! ;^)
(Although, 40 some years ago, before Interstates: 4 guys, going on leave, from Denver to Pennsylvania straight thru...)