Comment on Americans’ junk-filled garages are hurting EV adoption, study says
blargh513@sh.itjust.works 19 hours agoIn the us, home chargers will typically run on 240 volts, similar to a dryer or electric stove.
The amperage can be as low as 16 amps (not common) and up to 40 amps. There are higher amperage chargers, but they’re not super common. Most homes dont have that much capacity provisioned and adding it to the breaker box means new circuits and often the power company has to provide a higher capacity meter. It gets expensive.
Since volts x amps = watts, a 240 volt charger that operates at 40 amps will charge at 9600 watts or 9.6 kilowatts (maximum).
You can charge using a standard 120v outlet, most are rated for 15 amps. However, you will get 120v x 15a = 1800 watts or 1.8 kilowatts (maximum).
spongebue@lemmy.world 17 hours ago
Don’t forget the 80% rule! Because those ratings are made for shorter periods of time drawing electricity, and cars usually charge for hours, you need to charge at 80% of the circuit rating. So really you’ll charge at 120V x 12A =1.4kW. Not only that, but if you have anything else on that circuit you need to leave room for that too. My car defaults to 8A on level 1 unless you tell it to do 12, in which case you get just under a kilowatt.