What EV Charger Do You Need for a 2025 Mercedes-Benz G 580 with EQ Technology?
Your home supply can push far more current than this vehicle's onboard charger accepts. The car caps AC charging at 40 amps. You only need a 40 amp Level 2 setup to hit that ceiling. Buying a larger charger wastes money because the car leaves the extra power on the table.
The numbers
| Maximum AC charging rate | 9.6 kW (40 A) |
|---|---|
| Charger size to buy | 40 A |
| Circuit breaker required | 50 A |
| Outlet / connection | NEMA 14-50 outlet |
| Charge port | J1772 |
| Full charge on Level 2 | about 13.4 hours |
| Range added per hour (Level 2) | about 18 miles |
| Full charge on a 120 V outlet | about 90 hours |
| Range added per hour (120 V) | about 2.7 miles |
| EPA rated range | 239 miles |
| Energy for a full charge | about 129.1 kWh at the wall |
Why 40 amps and not more
The battery holds 129.1 kWh. Pumping that much energy into the pack takes 13.4 hours at the maximum rate of 9.6 kW. A 50 amp breaker feeds the required 40 amps safely to your equipment. Feeding the vehicle more juice changes nothing since the internal hardware limits intake. Extra amperage sits unused.
What the install involves
Hire an electrician to install a dedicated circuit with a 50 amp breaker. Request a NEMA 14-50 outlet on the wall. Hardwiring works too if you prefer a permanent connection without a plug. Do not attempt DIY wiring for high voltage circuits unless you hold a license.
Chargers that match this car
Rugged metal enclosure, built for outdoor use.
Portable cordset. Works on 120 V or a 240 V outlet.
Plugs into an existing 14-50 outlet, no hardwiring.
Worth having as well
Common questions
- Can I use a Level 1 charger?
- Yes, but it takes 90 hours to fill the battery from empty. You only gain 2.7 miles of range per hour.
- What plug does the charger use?
- The hardware relies on a NEMA 14-50 outlet. You can plug units like the ChargePoint Home Flex directly into it.
- Will a 48 amp charger charge the car faster?
- No. The onboard charger caps intake at 40 amps. Extra capacity at the wall does nothing.
- What connector does the car have?
- It uses a J1772 connector. Many 2025+ vehicles ship with a NACS port but include an adapter.
Other vehicles
Charging times derived from EPA data for the 2025 Mercedes-Benz G 580 with EQ Technology. Electrical requirements follow NEC 625.41, which sizes a circuit at 125% of a continuous load. Always have a licensed electrician verify your panel.