What EV Charger Do You Need for a 2023 Mercedes-Benz EQS 450?
Standard household wiring can push plenty of power, but your car only takes what its onboard charger allows. This Mercedes-Benz draws up to 40 amps on Level 2 equipment. Buying a larger charging unit wastes money because the vehicle cannot process faster AC input.
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 11.0 hours |
| Range added per hour (Level 2) | about 31 miles |
| Full charge on a 120 V outlet | about 73 hours |
| Range added per hour (120 V) | about 4.6 miles |
| EPA rated range | 340 miles |
| Energy for a full charge | about 105.5 kWh at the wall |
Why 40 amps and not more
The onboard charger caps AC intake at 9.6 kW. Hooking this vehicle up to a 50-amp or 60-amp supply changes nothing about the charging speed. The car refuses extra current. Sticking to a 40-amp EVSE delivers a full battery in 11.0 hours. You get 31 miles of range for every hour plugged in. The EPA test pegs the recovery rate at 27 miles per hour over 12.5 hours because federal testing accounts for grid inefficiencies.
What the install involves
You need a 50-amp breaker and a NEMA 14-50 outlet to feed this car properly. Hire an electrician for the installation. High-amperage circuits melt cheap receptacles. Hardwiring eliminates the failure point of a plug. Let a licensed professional pull permits and inspect your panel.
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. Every non-Tesla EV sold in North America through 2024 uses the J1772 connector for AC Level 2 charging.
- Can I plug this into a standard wall outlet?
- Level 1 charging works on a standard 120 V outlet. Expect 73 hours for a full charge at 4.6 miles per hour.
- Do I need to buy a portable cordset?
- Products like the Grizzl-E Mini Portable work on 120 V or a 240 V outlet if you need travel flexibility. Otherwise, mount a dedicated unit like the Grizzl-E Classic 40A on your garage wall.
- What is the battery capacity?
- The pack holds 105.5 kWh of energy. That power drives the 340-mile total range.
Other vehicles
Charging times derived from EPA data for the 2023 Mercedes-Benz EQS 450 (covering 3 EPA trim listings). Electrical requirements follow NEC 625.41, which sizes a circuit at 125% of a continuous load. Always have a licensed electrician verify your panel.