Charging time and miles per hour
Set the battery, the charge window and the charger. The result is plain arithmetic, worked out in your browser.
4 h 21 minto go from 20 to 80 %
- 50 kWhdrawn from the grid
- 36.2 miadded per hour of charging
- 157.5 miadded in total
The car's 11.5 kW AC limit caps the 11.52 kW charger.
The same charge at the five common ratings
The 75 kWh battery from 20 to 80 %, at the ratings that cover 391 of the 424 Level 2 listings. Rows marked * are held to the car's 11.5 kW AC limit.
| Rating | Rated output, kW | Reaching the car, kW | Time | mi per hour |
|---|---|---|---|---|
| 32 A | 7.68 | 7.68 | 6 h 31 min | 24.2 |
| 40 A | 9.6 | 9.6 | 5 h 13 min | 30.2 |
| 48 A | 11.52 | 11.5* | 4 h 21 min | 36.2 |
| 50 A | 12 | 11.5* | 4 h 21 min | 36.2 |
| 80 A | 19.2 | 11.5* | 4 h 21 min | 36.2 |
How to use it
Type the usable battery size of the car, the charge it has now and the charge you want. Enter the charger's rated output, or pick any of the 461 listed chargers to fill it in. Then enter the highest AC power the car itself accepts; it is in the car's specifications, often as the onboard charger rating. The result updates as you type, and the address bar keeps your numbers so a result can be shared.
What the numbers mean
Time is the energy drawn from the grid divided by the power that reaches the car. Drawn from the grid includes the losses set by the efficiency figure: at 90 %, 45 kWh into the battery takes 50 kWh from the wall. Miles per hour of charging is the power into the battery times the car's miles per kWh. None of these are measured values for a specific charger; the ENERGY STAR data supplies only the rated output. Level 1 and dual-input listings are rated as listed, often at 120 V.
For the test values behind each listing, start from an amp rating or the brand directory.