Level 2 charging has no fixed kWh figure, because Level 2 names a power class, not an amount of energy. A Level 2 session delivers roughly its power rating per hour: the U.S. Department of Transportation puts Level 2 at 7 to 19 kW, so expect about 7 to 19 kWh for every hour of charging — 7.7 kWh an hour from a typical 32 A home unit, 9.6 at 40 A, 11.5 at 48 A — as long as your car can accept that rate.
Key Takeaways
- Level 2 is a power class (7–19 kW per the DOT), so its kWh delivery is the rating multiplied by the hours charged.
- Typical home units add about 7.7, 9.6 or 11.5 kWh per hour at 32 A, 40 A and 48 A respectively.
- Your car’s onboard charger, tapering near full and shared public posts can all bring the real figure down.
- Overnight, the battery takes only what it needs — the charger’s hourly rate sets speed, not the total.
The Per-Hour Numbers Across the Level 2 Band
Kilowatts multiplied by hours gives kilowatt-hours, so the whole Level 2 range converts directly. These are session figures at a steady rate, before charging losses:
| Level 2 rating | Energy in 1 hour | Energy in an 8-hour overnight session |
|---|---|---|
| 7.7 kW (32 A) | about 7.7 kWh | about 62 kWh |
| 9.6 kW (40 A) | about 9.6 kWh | about 77 kWh |
| 11.5 kW (48 A) | about 11.5 kWh | about 92 kWh |
| 19.2 kW (80 A) | about 19.2 kWh | about 154 kWh |
Most cars stop long before the overnight column: once the battery reaches its target, the session ends and the remaining hours deliver nothing. The column shows capacity, not a typical bill. Our breakdown of how many kW a Level 2 charger is explains where these ratings come from, and how many kWh it takes to charge an EV works from the battery’s side — how much energy a refill needs in the first place.
Why Your Session May Deliver Less per Hour
- Your car’s onboard charger is the ceiling. A car that accepts 7.2 kW takes about 7.2 kWh per hour from any Level 2 unit, however powerful.
- The rate tapers near full. Cars slow charging as the battery fills, so the last hour of a full charge delivers less than the first.
- Public posts often run lower. Many public Level 2 posts use 208 V commercial supply or share power between two cars, so the hourly figure drops below the nameplate.
- Losses come off the top. Part of the energy drawn from the wall becomes heat during conversion, so the battery stores slightly less than the meter records.
Chargers Matched to the Rows
The three common home ratings above are easy to shop for. The EVDANCE EV-ACS3210T 32A NACS portable charger delivers about 7.7 kW, the EVDANCE EV-ACS4005T 40A NACS portable charger delivers 9.6 kW, and the EVDANCE EV-ACT5006T 48A Level 2 wall charger reaches up to 48 A hard-wired. Pick by how many kWh you need to replace overnight: a 40-mile day typically needs roughly 12 kWh back, which even the smallest of the three restores in under two hours.
Frequently Asked Questions
Is Level 2 charging 7 kWh?
Only if the session runs at 7 kW. Seven kWh is the energy one hour at 7 kW delivers. A 7 kW rating is a speed; the kWh total depends on how long the car charges at that speed.
How many kWh will I use overnight?
Only as much as your battery needs to reach its target. A car that arrives half empty and takes 30 kWh stops there, even on an 11.5 kW charger that could have delivered far more in the same hours.
Does a higher-kW Level 2 charger use more electricity overall?
No. It delivers the same energy in less time. The total kWh is set by how much the battery needs, plus small losses — not by the charger’s rating.
Related Reading
- How Many kW Is a Level 2 Charger?
- How Many kWh Does It Take to Charge an EV?
- How Long Does It Take to Charge an EV at 7 kW, 11 kW and 22 kW?
- How Much Does It Cost to Charge an EV at Home?
