What home charger does the GMC Hummer EV need?
| Model years | Trims | Charger | Breaker |
|---|---|---|---|
| 2024-2025 | all trims | 80 A | 100 A |
The GMC Hummer EV can take 80 A at home, and to charge at full speed it needs an 80 A charger on a 100 A breaker. Both the 2024 and 2025 trucks, pickup and SUV, accept 19.2 kW.
Why 80 amps and not more
Even at 80 A the Hummer adds only about 30 miles of range per hour, because it is a very heavy vehicle that uses a lot of energy per mile. On a 48 A charger that drops to about 18 miles per hour, which can leave a big battery well short of full after one night. This is one of the few vehicles where the biggest home charger is the right call.
Charging time by model year
| Year | EPA range | Level 2, miles per hour | Level 2, empty to full | 120 V, miles per hour |
|---|---|---|---|---|
| 2025 | 282 to 318 mi | 30 | 10.5 to 10.6 h | 2.3 |
| 2024 | 279 to 314 mi | 30 | 10.4 h | 2.3 |
Level 2 figures assume a charger that supplies the car's full rate. Where a year shows a range, it spans that year's trims.
The 2024 and 2025 trucks are nearly identical at the plug. A full charge from empty takes 10.4 hours on a 2024 and 10.5 to 10.6 hours on a 2025, with range between 279 and 318 miles.
What the install involves
Plan for a big job. An 80 A charger is hardwired to a 100 A breaker, and many houses need a panel or service upgrade to add a circuit that size. Get the electrician's load calculation before buying the charger, so you know which size the house can support.
- 80 A charger: 100 A breaker, hardwired only.
- Charge port, 2024: J1772. Every non-Tesla EV sold in North America through 2024 uses the J1772 connector for AC Level 2 charging.
- Charge port, 2025: J1772. From 2025 the industry is moving to the NACS port, and makers switch at different times. Some of these cars have a J1772 port and some have NACS with an adapter, so look at the port on your own car before choosing a charger's plug.
Chargers that fit the GMC Hummer EV
Smallest adequate unit first. Every amp above what the car accepts is capacity it never uses.
One of the few home units that can feed an 80 A car. Needs a 100 A circuit.
Worth having as well
Common questions
- Is a 48 A charger enough for a GMC Hummer EV?
- It works on a 60 A breaker, but at about 18 miles of range per hour a full charge takes far longer than a night.
- Can a GMC Hummer EV charge from a NEMA 14-50 outlet?
- Only slowly, through a 40 A plug-in charger. Full-speed charging needs a hardwired 80 A unit.
- How long does a GMC Hummer EV take to charge at home?
- About 10.4 to 10.6 hours from empty on an 80 A charger.
- Is 120 V charging useful for a GMC Hummer EV?
- Barely. It adds about 2.3 miles of range per hour.
Other models
Range and efficiency come from EPA data for the GMC Hummer EV, covering 4 EPA listings across 2 model years. Onboard charger ratings are from manufacturer specifications. Breakers follow NEC 625.41, which sizes a continuous load at 125%. Have a licensed electrician check your panel before buying.