Actually my math is based on real world experience. I can easily drive for 12 hours straight without a major food break. Quick bio break at a gas station, sure. Turn a 7 minute fillip into a 12 minute fill up.

On a trip that long, my wife is generally along as we'll, so we can trade off shifts driving. We will usually bring some snacks to eat along the way as well.

So, my numbers are still pretty accurate. You can go farther between fill ups on gas, and you can refuel (you, and the car) in less than 30 minutes ( or 45-60 minutes of you need more than a top-off, based on accessories use in the vehicles).

That sounds like hell on wheels. If you're worried about your long-haul trip taking an extra 30 minutes every two hours, maybe you should be flying instead?

I would also be concerned about increasing travel time by 25%. That's hardly trivial.

To establish a frame of reference, this means SF <-> LA would take ~7 hours instead of 5.5. SF <-> San Diego would be just shy of 10 hours.

Just betting that you don't regularly travel with kids...

I just drove from San Francisco to San Jose yesterday with my family, had to stop twice along the way for near-emergency bathroom breaks. 45 minutes every 4 hours sounds like NO PROBLEM.

Your wife is a saint.

If McDonalds are smart, they'll install charging stations at their restaurants. Maybe even with solar panels.

I believe the one in Connecticut is in a highway rest stop with a McDonald's in it.

150 mile range even at 50 mph is only 3 hours between stops, right?

We stop every 1.5 hours, when possible, for stretch/potty breaks, and every 3 hours or so for food. I think that planning your meals around charging isn't such a bad idea.

They'd likely need more charging ports, though, in the long term.