|
Circuit Breaker Size |
|
Copper wire size |
Charging Current |
@208 volts |
@240 volts |
|
100 amp |
|
#2 (75°C rating) |
80 amp |
16.6 kW |
19.2 kW |
|
60 amp |
Tesla 3/Y, VW ID4 |
#4 |
48 amp |
10 kW |
11.5 kW |
|
50 amp |
Campground 50A |
#6 |
40 amp |
8.3 kW |
9.6 kW |
|
40 amp |
Std. Electric Range |
#8 |
32 amp |
6.6 kW |
7.7 kW |
|
30 amp |
Cloth Dryer |
#10 |
24 amp |
5 kW |
5.7 kW |
|
20 amp |
|
#12 |
16 amp |
3.3 kW |
3.8 kW |
Continuous load such as EV charging should/must only draw up to 80% of the circuit breaker's rating (to avoid overheating and circuit breaker tripping).
Public chargers today are ≈ 6.6 kW.
Sun Country SCH100 (Enphase.com) can deliver 80A (19 kW @ 240 volts) and they are typically found at rest areas along highways.
Power ≈ Current x Voltage. For example, 32 A x 208V ≈ 6656 W, or 6.6 kW
DC chargers have much higher power ratings than Level 2 AC chargers.
DC charger power can be 25 kW, 50 kW, 75 kW, 100 kW, 150 kW, 250 kW, 350 kW or higher.
Newer EV equipped with 800V battery pack can take full advantage of the high-power DC chargers (>250kW).
Legacy EV battery packs are 400V.
EVSV manufacturers and modern campgrounds are converging on the NEMA type 14-50 plug and receptacle.
Special case: Enphase LCS20P comes with NEMA 14-30 plug, which is compatible with electric cloth dryers.
Hardwired EVSE installations eliminates the need for plug and receptacle.
For EV owners doing road trips: