A full charge at home — empty to 100% — takes roughly 6 hours for a 40 kWh battery at 7 kW, about 9 hours for 60 kWh, and around 14 hours for a 100 kWh pack. On Level 1 from a household outlet, the same full charges take days, not hours. Most charging-time tables quote the shorter 10–80% window instead, which is why their numbers look quicker than a true full charge.
Key Takeaways
- Empty to 100% at 7 kW takes about 6 hours for 40 kWh, 9 for 60 kWh, and 14 or more for 100 kWh; Level 1 takes days.
- Most published times quote 10–80%, which is a smaller fill than a full charge.
- The car’s onboard charger caps the power, and the final stretch to 100% runs slower.
- Before a trip, work backwards from the table — large batteries at 7 kW need an early-evening start.
Empty-to-Full Times by Battery Size
The example batteries below are labelled examples, not specific models. Times are the battery size divided by the charging power, with roughly 10% added for losses — the same method as our worked examples for charging time at 7 kW, 11 kW and 22 kW, which quote the 10–80% window instead.
| Example battery | Level 1 (about 1 kW) | Level 2 at 7 kW | Level 2 at 11 kW |
|---|---|---|---|
| 40 kWh | About 44 hours | About 6 hours | About 4 hours |
| 60 kWh | About 66 hours | About 9 hours | About 6 hours |
| 80 kWh | About 88 hours | About 12–13 hours | About 8 hours |
| 100 kWh | About 110 hours | About 14–15 hours | About 10 hours |
Two limits can stretch these times. The car’s onboard charger caps AC power — many cars accept at most 7.4 kW or 11 kW, whatever the wallbox offers — and charging slows as the battery approaches full, so the last part of a 100% charge runs below the headline rate. The U.S. DOT’s typical figures put Level 1 at about 1 kW and Level 2 in the 7–19 kW band.
Why Almost Nobody Does This Every Night
A full charge is a trip tool, not a daily habit. Day to day, a car comes home partly charged and only needs its daily miles replaced — typically a few hours at 7 kW — which is why leaving an EV charging overnight works so well in practice. Empty to full only matters the night before a long drive, or after arriving home nearly empty. If that is your plan, work backwards from the table: an 80 kWh car at 7 kW needs to start in the early evening, not at bedtime; a 100 kWh car may need two evenings, or a higher-power charger.
Planning a Full Charge Before a Trip
- Find your usable battery size in the car’s specification, then read its row in the table.
- Start earlier than feels necessary: the car will not accept full power all the way to 100%.
- Use the charger’s schedule so the session finishes near your departure time, rather than the car sitting full for a day or two.
- If one night is not enough, top up the evening before as well — two partial nights beat one impossible one.
- Check the cost side once, in what home charging costs: a full charge is simply the battery size times your rate.
Shortening a Full Charge at Home
Power is the lever. The EV-ACT5006T 48A Level 2 wall charger delivers up to 11.5 kW where the car accepts it — the fast end of the 11 kW column — on a 60 A breaker, per the NEC continuous-load rule. A portable option, the EV-ACS4005T 40A NACS portable charger at 9.6 kW, sits between the 7 kW and 11 kW columns and can be taken to the destination. Have a licensed electrician fit any new high-current circuit.
Frequently Asked Questions
Why do other tables say a 60 kWh car takes only about 6 hours?
Because they quote 10–80%, not empty to full. That window adds about 42 kWh to a 60 kWh battery; a full charge adds the whole 60 kWh, plus losses, plus the slower final stretch.
Is it bad for the battery to charge to 100% at home?
An occasional full charge before a trip is normal use. For daily driving, follow the limit your manufacturer recommends — many cars let you set a lower everyday target and override it for a trip.
Can Level 1 ever do a full charge?
Yes, given time. At about 1 kW it adds roughly 2–5 miles of range per hour, so a full charge of a large battery runs to four or more days. Level 1 suits topping up small daily use, not refilling an empty pack.
Related Reading
- How Long Does It Take to Charge an EV at 7 kW, 11 kW and 22 kW?
- Can You Leave an EV Charging Overnight?
- How Much Does It Cost to Charge an Electric Car at Home?
