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How long does it take to charge an electric vehicle?

This is something like asking how long it will take to fill a swimming pool with water.  It depends on a few things, like pool size and the amount of water you have set to come out of the hose. If you turn up the water, it will fill faster.  If you have a large pool it will obviously take longer to fill than a small pool at the same rate.  Pretty simple stuff, right?

There are similar variables that apply when determining the amount of time to charge an electric vehicle. Determining the charge time for your BEV (battery electric vehicle) or PHEV (plug-in hybrid electric vehicle) is simple with 3 key pieces of information:

  1. Vehicle Acceptance Rate (aka the car’s charger, in kW)
  2. Vehicle Battery Capacity (in kWh)
  3. Charging Station Delivery Rate (aka the stations’ max output capacity, in kW)

Here are some examples using the chart below:

A)    A Toyota Rav4 EV charging with an LCS-25 charging station with 240V:

  1. Check the Vehicle Acceptance Rate versus the Charging Station Delivery Rate for the LCS-25.  Which is lower?  That will be your limiting factor.  The Vehicle Acceptance Rate of the Toyota Rav4 EV is 9.6 kW.  The LCS-25 Delivery Rate is 4.8 kW.  Use 4.8 kW because it is the lower of the two numbers (this is the maximum power the charging station can deliver to the vehicle).
  2. Divide the battery capacity by the lower number from above.  Divide 41.8 kWh by 4.8 kW from above.  The result is 8.71 hours to recharge the battery pack from empty to full.

B)     A Toyota Rav4 EV and a CS-50 charging station with 240V:

  1. Check the Vehicle Acceptance Rate versus the Charging Station Delivery Rate for the CS-50.  Which is lower?  That will be your limiting factor.  The Vehicle Acceptance Rate of the Toyota Rav4 EV is 9.6 kW.  The CS-50 Delivery Rate is 9.6 kW.  Use 9.6 kW because both are the same (it is both the maximum the vehicle will draw and the maximum power the charging station is capable of delivering).
  2. Divide the battery capacity by the lowest number from above.  Divide 41.8 kWh by 9.6 kW from above.  The result is 4.35 hours from empty to full.

Note:  For assistance choosing the perfect EV charging station, use our EVSE Selector Tool. Just choose your vehicle from the drop-down list and we will show you our three top choices including charging times (from empty). Happy charging!

Vehicle

Type

Acceptance Rate (kW)

Battery Size (kWh)

Time to complete a full charge (in hours)

Level 1
120V
15 amp breaker

Level 2
208/240V
25 amp breaker

Level 2
208/240V
40 amp breaker

Level 2
208/240V
50 amp breaker

PCS-15 (1.4 kW delivery rate with 120V)

LCS-25 (4.8kW delivery rate with 240V)

CS-40 (7.2 kW delivery rate with 240V)

CS-50 (9.6 kW delivery rate with 240V)

BMW ActiveE BEV

7

32

22.86

6.67

4.57

4.57

Chevy Volt PHEV

3.3

16

11.43

4.85

4.85

4.85

Fisker Karma PHEV

3.3

16

11.43

4.85

4.85

4.85

Ford Focus EV BEV

6.6

23

16.43

4.79

3.48

3.48

Mitsubishi i-MiEV BEV

3.3

16

11.43

4.85

4.85

4.85

Nissan Leaf BEV

3.3

24

17.14

7.27

7.27

7.27

Nissan Leaf Upgrade BEV

6.6

30

21.43

6.25

4.55

4.55

Tesla Model S BEV

19.2

85

60.71

17.71

11.81

8.85

Tesla Roadster (Model K) BEV

17

56

40.00

11.67

7.78

5.83

Toyota Prius EV PHEV

3.3

4.4

3.14

1.33

1.33

1.33

Toyota Rav4 BEV

9.6

41.8

29.86

8.71

5.81

4.3

*Acceptance Rates and Battery Sizes were obtained using Wikipedia and/or manufacturer websites in October of 2012.  This chart does not take into account the usable battery % (this means that it won’t actually take you as long to charge your EV as shown in the chart above!  This is a good thing 🙂 Example: the Nissan Leaf has an approximate 90% useable battery for charging purposes).

NEW! Check out our follow up blog to determine how much it will cost to charge your electric vehicle!

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