What EV Charger Do You Need for a 2022 Mercedes-Benz EQS 450?
A full charge takes 12.8 hours on a Level 2 setup. That timeline easily fits standard overnight parking schedules. You need a 40 amp supply to hit this speed.
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 12.8 hours |
| Range added per hour (Level 2) | about 27 miles |
| Full charge on a 120 V outlet | about 85 hours |
| Range added per hour (120 V) | about 4.1 miles |
| EPA rated range | 350 miles |
| Energy for a full charge | about 122.5 kWh at the wall |
Why 40 amps and not more
The car draws 9.6 kW and caps out at 40 amps. Putting a larger charging unit on the wall changes nothing because the onboard hardware cannot accept more power. Buying a 48 amp or 50 amp unit wastes money. Stick to the 40 amp rating for peak performance.
What the install involves
You need a dedicated 50 amp breaker paired with heavy gauge wiring. A NEMA 14-50 outlet handles the plug in connection for units like the Grizzl-E Classic or the ChargePoint Home Flex. Hire a licensed electrician to run the new circuit from your main panel. Code requirements dictate correct wire sizing and torque specs.
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
- What connector does this car use?
- It uses a J1772 connector for all standard home Level 2 charging. Every non Tesla vehicle sold in North America through 2024 relies on this plug format.
- Can I use a standard wall outlet?
- Level 1 charging on a standard household outlet takes 85 hours for a full tank and yields 4.1 miles per hour. Install a 240 volt circuit instead.
- What hardware options work for this vehicle?
- The Grizzl-E Classic 40A, Grizzl-E Mini Portable, and ChargePoint Home Flex NEMA 14-50 all match the maximum 40 amp draw. Each one plugs directly into a 14-50 outlet.
- Why do the EPA charge times differ from the peak rate?
- The EPA rated test takes 12.5 hours at 28 miles per hour due to testing protocols and efficiency losses during power conversion. The direct math for a full tank at maximum rate sits at 12.8 hours.
Other vehicles
Charging times derived from EPA data for the 2022 Mercedes-Benz EQS 450. Electrical requirements follow NEC 625.41, which sizes a circuit at 125% of a continuous load. Always have a licensed electrician verify your panel.