I recently came across some data on Tesla charging that I found interesting. There are 3 levels of Tesla charging. All this assumes the same model Tesla and a full charge from very low to full.
At other lowest level and cheapest to implement is a simple 110V extension cord in the garage. This takes about 20 hours.
The midlevel recharge system is again home based, more costly to implement and consists of a dedicated 220V circuit. This takes about 8 hours.
The high end, fast recharge is quite expensive, uses 440V electricity and will not be compatible with most residences. It will be limited to commercial charge stations. I've seen a few of these around town at shopping malls. It's a fat pylon with a charging cable and a credit card reader. The idea is to plug in, go shopping then return to a charged car. Recharge time is about 2 hours.
I'm going on a 900mi trip in a few weeks. If I had a Tesla, this would increase my pit stops for fuel by something like 50% or more each taking 1.5 hour as opposed to 10min gas stops. I often make this trip in 1 long day and sometimes overnight along the way. An EV vehicle will easily guarantee 2 full days.
My opinions....
Tesla is working like crazy right now to fix wait times and charge times.
Two big problems are these:
1. Infrastructure availability and wait times
2. Power & compatibility. What I mean by that is that the bigger charging stations might push out 100 - 150kW, but the cars can only suck in about 25kW at one time. Longer charge times.
They are working on this. The newer cars will be able to take in all 150kW and cut that charge time down to 30 minutes or less.
All of this takes time to build/design.
If you are ever needing to drive on a 5 hour plus trip, I highly recommend mapping out and ensuring the charging stations you plan on using are in service. I would never recommend doing this on your first EV rodeo.
Having driven them for 6 years I know what to expect and where to go. I have driven my Nissan Leaf from Atlanta to Charlotte once. It took me an extra hour an a half due to charge times, but I had a fast charger on my car. Most people don’t have thouse.
Another thing to remember is that Tesla connectors are unique and not compatible with the standard industry connectors. You need to get an adapter to make those work. Friend of mine rented a Tesla for a drive from N GA to Savannah and he forgot to get one from the rental car company (Enterprise). His trip was a disaster.
You are a little bit off on the 110 volt 12 amp car charger. It is more like 20 hours for a full charge from 25%. The 220 is about right at 8 to 10 hours. The commercial fast chargers can take up to 1.5 hours but you generally don’t fast-charge to 100 percent because of the amount of heat generated in the battery while you are stuffing all that electricity in there. I get 80% from about 15% in about 55 minutes. I can go 200 miles at 80% and get down to 15%. Fast chargers are all over the place. I went from Northern California to Southern Washington in 15 hours. That’s about 600 miles. I left home at 90% and made 3 stops to charge along the way at 1 hour each stop.