40 amp EV charger: power, breaker size and range per hour
40 A × 240 V = 9.60 kW · circuit ≥ 50 A (usually a 50 A breaker) · about 32 mi of range per hour at 30 kWh/100 mi
The breaker figure follows the NEC rule that EV charging is a continuous load, so the circuit is sized at 125% of the charger's current (see DOE AFDC: charging at home). This is an estimate, not electrical advice; at 208 V (some apartments) power is about 13% lower.
Range added per hour for popular EVs
| EV | EPA kWh/100 mi | Per hour | Per 8-hour night |
|---|---|---|---|
| Tesla Model Y | 26.5 | 36 mi | 290 mi |
| Tesla Model 3 | 29.6 | 32 mi | 259 mi |
| Chevrolet Equinox EV | 32.6 | 29 mi | 236 mi |
| Ford F-150 Lightning | 47.9 | 20 mi | 160 mi |
| Hyundai Ioniq 5 | 34.5 | 28 mi | 223 mi |
| Ford Mustang Mach-E | 33.6 | 29 mi | 229 mi |
| Kia EV9 | 41 | 23 mi | 187 mi |
| Rivian R1S | 43.2 | 22 mi | 178 mi |
Estimates; assumes the car accepts 9.6 kW on AC. All EVs.
ENERGY STAR chargers rated 40 A (20), lowest standby first
| Charger | Max output | Max current | Cord | Wi-Fi/network | Standby (no vehicle) | Max standby cost/yr* |
|---|---|---|---|---|---|---|
| Grizzl-E Classic | 9.6 kW | 40 A | 24 ft | No | 0.8 W | $1.28 |
| Lectron LECHG14-50-40ABLKUS | 9.6 kW | 40 A | 16 ft | No | 0.83 W | $1.33 |
| Lectron LECHG14-50-40ATSLBLKUS | 9.6 kW | 40 A | 16 ft | No | 0.85 W | $1.36 |
| Lectron LECHGEXP40A-J1772-APP, LECHGEXP40A-NACS-APP | 9.6 kW | 40 A | 17 ft | Yes | 1.08 W | $1.73 |
| Grizzl-E Mini | 9.6 kW | 40 A | 24 ft | Yes | 1.34 W | $2.15 |
| EvoCharge W1-1962-2PT0 | 9.6 kW | 40 A | 25 ft | No | 1.68 W | $2.69 |
| Lectron LECHG14-50-40ABLKUS-APP | 9.6 kW | 40 A | 16 ft | Yes | 1.7 W | $2.73 |
| EVIQO EVIPOWER | 9.6 kW | 40 A | 25 ft | Yes | 1.75 W | $2.81 |
| Lectron LECHGNexusNEMA14-50J1772 | 9.6 kW | 40 A | 22 ft | No | 1.88 W | $3.02 |
| Grizzl-E Smart | 9.6 kW | 40 A | 24 ft | Yes | 2.33 W | $3.74 |
| EVIQO EVIPOWER240J | 9.6 kW | 40 A | 25 ft | Yes | 2.36 W | $3.79 |
| EVIQO EVIPOWER240N | 9.6 kW | 40 A | 25 ft | Yes | 2.36 W | $3.79 |
| Leviton EV40P | 9.6 kW | 40 A | 25 ft | Yes | 2.59 W | $4.15 |
| Lectron LECHGNexusNEMA14-50J1772-APP | 9.6 kW | 40 A | 22 ft | Yes | 3.14 W | $5.04 |
| Autel Maxi US AC W10-N14-H | 9.6 kW | 40 A | 25 ft | Yes | 3.33 W | $5.34 |
| DeWalt DXPAEV040 | 9.6 kW | 40 A | 25 ft | Yes | 3.35 W | $5.37 |
| EvoCharge W1-1962-7PT0 | 9.6 kW | 40 A | 25 ft | Yes | 3.43 W | $5.50 |
| Autel Maxi US AC W10-N14-H | 9.6 kW | 40 A | 25 ft | Yes | 4.57 W | $7.33 |
| Autel Maxi US AC LW10-N14 | 9.6 kW | 40 A | 25 ft | Yes | 4.98 W | $7.99 |
| EcoFlow PowerPulse EV Charger (9.6kW) | 9.6 kW | 40 A | 24 ft | Yes | 5.11 W | $8.20 |
*Estimate: ENERGY STAR "no vehicle mode" input power × 8,760 h, i.e. the most it could use in a year if no car were ever plugged in, × U.S. average residential rate 18.31¢/kWh (EIA, July 2026 (preliminary)).