this post was submitted on 21 Aug 2024
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While it is true cars are parked the vast majority of any typical day, the lack of charging infrastructure is the actual hurdle.
Many people with homes do not have garages or other locations with accessible outlets. Parking on the street is extremely common in dense neighborhoods.
Many people live in apartment complexes with either open parking lots or with sheltered spaces that don't have electricity.
Both can be solved with more infrastructure for charging and more EVs that can plug into regular outlets for slow charging.
Level 1 charging (regular 120v house outlet) is underappreciated. Even for drivers that can only get 10%-25% charge added per day during parked times, that can be a game changer which would otherwise have them chasing Level 3 (DC fast chargers) at times when they'd really just like to be at home.
The most underappreciated charging in my opinion is Level 2 is NEMA 6-15. These are 240v lines with 15A. These use the exact same wire as the 120v 15A wall outlet. This means that if you only have your garage outlet for charging, you can simply swap a breaker on one end and the outlet on the other and make no changes to the wiring connecting them. While you may only get 3 miles per hour charging on a 120v 15A outlet, that same wire can give you 11 miles per hour just by switching it to 240v. Thats almost triple the charging speed and for many would mean all of their charging needs are met at home without any new wiring being run!
Switching to a NEMA 5-20 is easier and most modern houses are already wired to support it with no changes other than the plug which is a 5 minute job. (Don't just assume you're okay though, get it checked out) you also don't give up what might be your only accessible plug for 120v things.
That'll take you from 7kmh to 11/12kmh which doesn't seem like much but is actually quite a lot when the average commute in the USA is already less than what a 5-15 will do. Easily an extra 50km a day if its parked after work. The 5-20 also makes it more capable during the winter months.
I have a small commute into town and have been fine on a regular 120v plug the entire time.
The only time it's annoying is when we come home from a road trip and we didn't charge longer to get home with more. Then it takes days to build up (which is fine our commute is small) but for emergency situations I'd kinda rather have it be higher faster.
Edit: all that being said though... efficiency wise 120v takes a hit and $ per kw/h you are paying more to use 120v
A 20A circuit would require 12AWG wire (yellow romex) to maintain code in the USA and Canada. I can't say I see that as common garage wiring in the houses I've seen. Most have 14AWG (white romex) which would limit it to 15A outlet (120v or 240v are both fine though).
Are those modern or older?
I was under the impression it was standard now? Maybe Canada vs US difference?
Edit: not standard as in code, just that it's what usually happens now.
My house was built in the last 15 years and has white romex (14AWG) to the garage outlets. I don't know about a house built brand new today.
Well I might be wrong then, I thought 15 years would definitely be like that.