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SAE J2954 is a standard for wireless power transfer (WPT) for electric vehicles led by SAE International.It defines three classes of charging speed, WPT 1, 2 and 3, at a maximum of 3.7 kW, 7.7 kW and 11 kW, respectively.
But the fastest possible Level 2 charging is at 80 amps, or 19.2 kW, making it more than three times faster than the aforementioned 24-amp setup. The hardware on your car dictates the maximum ...
AC Level 2 equipment provides charging through 240-volt or 208-volt electrical service. 240-volt service is typical in residental charging, while 208-volt is common in commercial charging.
The amount of range gained per time charging, charging speed, is the ratio of charging power to the vehicle's consumption, and its inverse is the charging time per driven distance: C h a r g i n g s p e e d [ k m / h ] ≡ c h a r g i n g p o w e r [ k W ] c o n s u m p t i o n [ k W h / k m ] {\displaystyle Charging\ speed\ [km/h]\equiv {\frac ...
AC Level 2: Uses 240 V (single phase) or 208 V (three phase) power to supply between 6 and 80 A (1.4–19.2 kW). It provides a significant charging speed increase over AC Level 1 charging. It provides a significant charging speed increase over AC Level 1 charging.
The NEMA 14-50 outlets provide 240 volts and 50 Amps for a total of 12.5 Kilowatts for level 2 charging of electric vehicles. [ 175 ] [ 176 ] Level 2 charging can add up to 30 miles of range per hour of charging compared to up to 4 miles of range per hour for level 1 charging from 120 volt outlets.
A Level 1 charger supplying 120V at 8 amps adds around 2.8 mi (4.5 km) of range per hour, taking about 88 hours for a full charge. The maximum Level 1 charging rate at 12 amps, the average amperage of a North American household power outlet, adds around 4 mi (6.4 km) per hour, requiring approximately 62 hours for a complete charge.
For example, the 2020 Chevrolet Bolt has a 66-kWh lithium-ion battery and a 7.2-kW onboard charging module; with an EPA range of 259 miles (417 km) and energy efficiency of 118 mpg‑e (29 kW⋅h/100 mi; 17.7 kW⋅h/100 km), [25] it can use its portable charge cord to charge at AC Level 1 (120 V, 12 A) to get up to 4 mi (6.4 km) of range per ...