What EV Charger Do You Need for a 2024 Mercedes-Benz EQS 450?
Forty amps is the target. Your car tops out at 9.6 kW on Level 2 AC power. You need a 40 amp EVSE to hit that ceiling. Anything larger is a waste of copper.
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 86 hours |
| Range added per hour (120 V) | about 4.1 miles |
| EPA rated range | 352 miles |
| Energy for a full charge | about 123.2 kWh at the wall |
Why 40 amps and not more
The onboard charger dictates the maximum power intake. Feeding this battery more amps from a larger charger does nothing because the car limits the current to 40 amps. A 40 amp supply fills the 123.2 kWh pack from empty in 12.8 hours. That speed yields 27 miles of range for every hour plugged in. Buy a 40 amp unit like the Grizzl-E Classic or the ChargePoint Home Flex to match the car.
What the install involves
A 50 amp breaker is required for this setup. Your installer will put in a NEMA 14-50 outlet to handle the load. Hardwiring is also an option if you prefer a permanent link without a plug. Call a licensed electrician to verify your panel capacity before turning on the circuit. Code rules demand professional installation for heavy continuous loads.
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 the car use?
- It uses a standard J1772 connector for Level 2 charging. Every non-Tesla EV sold in North America through 2024 uses this plug type.
- Can I use a standard wall outlet?
- Level 1 charging on a standard household outlet takes 86 hours for a full charge. That method only gives you 4.1 miles of range per hour.
- What is the EPA charging time?
- The EPA rating lists a full charge time of 12.5 hours at 28 miles of range per hour. Real world results vary based on grid conditions and temperature.
- Do I need a portable charging cord?
- The Grizzl-E Mini Portable works on 120 V or a 240 V outlet. It delivers 40 amps of power and features a 25 foot cable.
Other vehicles
Charging times derived from EPA data for the 2024 Mercedes-Benz EQS 450 (covering 4 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.