this post was submitted on 21 Aug 2025
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Also, volts and amps are apples and oranges. Home electric circuits mostly run on 120 volts, but some bigger things like stoves and central air run on 240 volts instead. Amperage is the other piece of the puzzle. Wire sizing is largely based on how many amps the circuit can carry. Multiply the two together, and you get watts. Divide that number by 1000, and you get kilowatts.
My car's battery has a capacity of 65 kilowatt-hours, meaning it can run 65 kilowatts for an hour, 1 kilowatt for 65 hours, 13 kilowatts for 5 hours... You get the idea. Same idea goes for charging. My 240V 40A charging setup (which runs on a 50A breaker) can give almost 10 kilowatts of power, meaning my battery will be charged 0-100 in about 6.5 hours. A regular outlet gives about a kilowatt and can do it in about 65 hours. But before you think that's useless, remember that you can easily plug in daily and if you only use a fraction of your battery each day, it's no big deal at all!