If you’re about to buy an EV or you just brought one home, this is usually the very first practical question: how long will it actually take to charge in my garage overnight? The honest answer is “it depends” — but not in a vague way. Charging time comes down to three concrete numbers: your charger type, your amperage, and your battery size. Once you know those three, you can calculate your real charging time almost exactly.
Quick Answer
- Level 1 (120V): 20–40+ hours for a full charge, or about 3–5 miles of range per hour.
- Level 2 (240V): 4–10 hours for a full charge, or about 20–45+ miles of range per hour, depending on amperage.
- DC Fast Charging (public only): 20–45 minutes to reach 80%, not available for home installation.
For most drivers, a Level 2 charger fully replenishes the battery overnight, while Level 1 works only for shorter daily commutes.
Home EV Charging Time by Charger Type
| Charger type | Voltage | Miles of range per hour | Time for full charge (typical 60-75 kWh battery) |
|---|---|---|---|
| Level 1 | 120V | 3 – 5 miles | 30 – 50+ hours |
| Level 2 (16A) | 240V | 10 – 15 miles | 12 – 16 hours |
| Level 2 (32A) | 240V | 20 – 30 miles | 7 – 10 hours |
| Level 2 (40A) | 240V | 25 – 35 miles | 6 – 8 hours |
| Level 2 (48A) | 240V | 30 – 40 miles | 5 – 7 hours |
These are general ranges. Actual results depend on your specific vehicle’s onboard charger limit, battery size, and even outside temperature (cold weather slows charging speed somewhat).
How to Calculate Your Own Charging Time
You don’t need to guess — this formula gets you a close real-world estimate:
Charging time (hours) = Battery capacity (kWh) ÷ Charging power (kW)
To find charging power in kW, multiply your charger’s voltage by its amperage, then divide by 1,000:
Charging power (kW) = Volts × Amps ÷ 1,000
Example calculation
A 32-amp Level 2 charger on a 240-volt circuit: 240 × 32 ÷ 1,000 = 7.68 kW
For a 70 kWh battery starting from empty: 70 ÷ 7.68 = ≈ 9.1 hours for a full charge
In practice, you’ll rarely charge from fully empty, and charging slows slightly as the battery approaches 100% — so real-world overnight charging is often a bit faster than this worst-case estimate.
Charging Time by Common Battery Sizes (Level 2, 32-Amp Charger)
| Battery size | Approx. full charge time | Overnight charge (8 hrs) covers |
|---|---|---|
| 40 kWh (compact EV) | ~5.2 hours | Full charge, easily |
| 60 kWh (mid-size EV) | ~7.8 hours | Full charge |
| 75 kWh (full-size EV) | ~9.8 hours | ~80-85% of battery |
| 100 kWh (large SUV/truck) | ~13 hours | ~60-65% of battery |
If you drive a larger-battery EV or truck and want a guaranteed full charge every night, sizing up to a 40-48 amp charger closes most of that gap — see our guide on how many amps you need for a home EV charger to size it correctly for your vehicle.
What Actually Changes Your Charging Time
- Your car’s onboard charger limit: even a 48-amp charger can’t charge faster than what your specific EV is built to accept (commonly capped at 32, 48, or higher depending on the model).
- Battery state of charge: charging typically slows down above ~80% to protect battery health — this matters more for fast charging than home Level 2 charging, but it still applies.
- Cold weather: charging speed can drop noticeably in freezing temperatures as the battery management system limits charge rate to protect the battery.
- Circuit amperage vs. charger rating: if your electrician installs a lower-amperage circuit than the charger supports, your real-world speed will match the circuit, not the charger’s maximum rating.
Worked Example: Full Charge Times by Battery Size
Time = energy needed ÷ charging power. Here is a 10% to 90% charge (80% of the battery) with about 10% charging losses, at three common power levels:
| Usable battery | From the wall (10→90%) | Level 1, 1.44 kW | Level 2, 7.68 kW (32 A) | Level 2, 11 kW (48 A) |
|---|---|---|---|---|
| 40 kWh | 35.6 kWh | 24.7 h | 4.6 h | 3.2 h |
| 60 kWh | 53.3 kWh | 37.0 h | 6.9 h | 4.8 h |
| 80 kWh | 71.1 kWh | 49.4 h | 9.3 h | 6.5 h |
| 100 kWh | 88.9 kWh | 61.7 h | 11.6 h | 8.1 h |
Example: an 80 kWh battery needs 80 × 0.80 ÷ 0.90 = 71.1 kWh; at 7.68 kW that is 71.1 ÷ 7.68 = 9.3 hours. The 11 kW column only applies if your car’s onboard charger accepts 11 kW.
Figures in this example are illustrative and rounded; your rates, vehicle and installation will differ.
Sources and Further Reading
- U.S. DOE Alternative Fuels Data Center — Charging Plug-In Electric Vehicles at Home
- ENERGY STAR — Certified Electric Vehicle Chargers
Last reviewed: October 2026.
Frequently Asked Questions
Does charging to 100% every night take longer than charging to 80%? Yes — most EVs charge quickly up to around 80%, then taper the charging speed to protect the battery. For daily use, charging to 80-90% is often recommended and adds only a modest amount of time compared to a full 100% charge.
Is it faster to charge with a higher-amperage charger if my car can’t use all the amps? No. Your charging speed is capped by whichever is lower — the charger’s amperage or your car’s onboard charger limit. Extra charger capacity only helps if you plan to use it with a future vehicle.
Does home charging time vary by season? Yes, modestly. Cold weather can slow charging speed by reducing how quickly the battery accepts current, though the difference is usually a matter of extra minutes to an hour, not a dramatic change.
Key Takeaways
- Level 2 charging (240V) is 4-10x faster than Level 1 (120V) for nearly every EV.
- You can calculate your exact charging time using volts × amps ÷ 1,000 = kW, then battery size ÷ kW = hours.
- Most single-EV households fully recharge overnight with a 32-40 amp Level 2 charger.
- Larger batteries or trucks may need higher amperage to guarantee a full overnight charge.
