it can be any voltage. its just the lower voltage the lower the power and the slower the charging. Most commercial buildings like hotels and office buildings have 208 volts instead of 240 volts. Any time i charge at a office building or hotel after voltage sag from charging i normally see 198-205 volts. You can ever charger from a standard bedroom nema 5-15 120 volt outlet and after long extension cords and voltage say it can be under 110volts.I have a 48A Enel Juicebox wall charger, with about a 15' run from my electrical panel. I also cant park my car close to the charger, so had to purchase this Lectron 40' extension cable (Lectron J1772 EV Extension Cord | 40 ft). When charging at 48A, the Tesla app shows a charging voltage of 231-232v. If I dial back to 40A, which the cable says its rated for, I'm at 233-234v. At 24A I'm at 236-238v (but who wants to charge at 24A if I have a 48A charger?).
My cost of electricity is pretty low so I'm not really concerned about the loss of a few cents. Main question is: Is it detrimental to my 2023 Model Y LR (or my new Rivian R1S) to be charging at a voltage between 231(@48A)-233(@40A)?
Is ambient temperature of the cable and car also a factor in the voltage at the car? At what point is the voltage too low that it would result in damage to the car/battery?
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