What EV Charger Do You Need for a 2025 Mercedes-Benz EQS 450?
The 2025 Mercedes-Benz EQS 450 requires a 40 amp Level 2 home charging setup. Your car caps AC intake at 9.6 kW. Buying a larger charger wastes money because the vehicle cannot draw more power.
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 13.8 hours |
| Range added per hour (Level 2) | about 28 miles |
| Full charge on a 120 V outlet | about 92 hours |
| Range added per hour (120 V) | about 4.2 miles |
| EPA rated range | 390 miles |
| Energy for a full charge | about 132.6 kWh at the wall |
Why 40 amps and not more
Matching the 40 amp maximum amperage lets you replenish the 132.6 kWh battery pack overnight without paying for utility upgrade costs. Plugging into a 40 amp supply yields 28 miles of range per hour. A larger 48 amp or 80 amp circuit will not charge this car any faster. The onboard inverter regulates the incoming current. Feed it 40 amps and it runs at peak efficiency. Put a bigger unit on the wall and the car ignores the extra capacity.
What the install involves
You need a 50 amp breaker and heavy gauge copper wire run from your service panel to the garage. Ask a licensed electrician to check if your main panel has spare capacity for the load. A NEMA 14-50 outlet handles the plug connection safely. Hardwiring is also an option for permanent outdoor mounts. Code requires a GFCI breaker for garage outlets.
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
- How long does a full charge take?
- Going from empty to full takes 13.8 hours at the maximum Level 2 rate. The EPA test estimates 14.0 hours for the same job. Level 1 standard household charging takes 92 hours.
- What plug type does the car use?
- This vehicle uses a J1772 connector. Many 2025 models ship with a NACS port alongside a J1772 adapter, so check your specific delivery before ordering hardware.
- Can I use a standard wall outlet?
- Standard 120 volt outlets deliver only 4.2 miles of range per hour. You will need a 240 volt circuit for daily driving needs.
- Which chargers work with this car?
- The Grizzl-E Classic 40A, Grizzl-E Mini Portable, and ChargePoint Home Flex NEMA 14-50 all match the 40 amp requirement. They plug directly into a 14-50 outlet.
Other vehicles
Charging times derived from EPA data for the 2025 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.