120v is normally about 1 mile of range per hour which isn't great but is OK if you don't have to drive much. I have a 40 mile round trip commute to work.
We get 7km an hour of charging in the summer time at 120V. It's lower in the winter as some of the power goes to keeping the battery warm. It's not completely lost, though -- starting out with a warm battery results in much greater range than starting with a cold battery in the winter.
For 14 months, I charged my 2023 Bolt EUV via the Chevy EVSE plugged into a wall outlet. I was getting about 2 miles of range per hour. There's a setting in the Bolt for a "home location" where you say you have a dedicated outlet and that increases the draw from 8A to 12A. That got me to 3 per hour.
We knew we were moving and I have a 240V EVSE at the current house. I found the 120V worked for me with very rare DC fast charging necessary, mostly when I visited a family member downstate. This, though, was a stage of my life where 2 kids were in college and the other had his own car. Much different than when they were on 3 different soccer teams, different schools, etc.
Unless you live in a very cold environment, or drive a very inefficient/large EV, a standard 120V outlet is good for 3 miles of range per hour. If you can find a 20A outlet, usually that jumps to 5-6mph due to less overall fixed charging overhead.
The charger that came with the car has a 120v 12A mode. That's ~1.4kW. Add some charging losses, at least 1.2kW probably makes it into the battery.
1.2 * 3.2 > 1.5.
Even a Lightning averages about 2mi/kWh.
The Mach E isn't even that impressive in efficiency.
