What EV Charger Do You Need for a 2025 Mercedes-Benz EQS 680 Maybach?
Forty amps is the target. Your car takes a maximum AC draw of 40 amps at 9.6 kW. A Level 2 supply handles a full battery refill in 13.7 hours. You need an electrician if you lack a 50 amp circuit.
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 13.7 hours |
| Range added per hour (Level 2) | about 22 miles |
| Full charge on a 120 V outlet | about 91 hours |
| Range added per hour (120 V) | about 3.3 miles |
| EPA rated range | 302 miles |
| Energy for a full charge | about 131.5 kWh at the wall |
Why 40 amps and not more
Your onboard charger caps incoming power at 40 amps. Buying a larger 48 amp or 80 amp supply wastes money because the car cannot draw the extra juice. The vehicle ignores excess capacity and pulls its maximum limit of 40 amps. Feeding it anything smaller than 40 amps increases your charging time. Stick to the recommended 40 amp rate to get 22 miles of range per hour of charging.
What the install involves
You need a 50 amp circuit breaker to feed a 40 amp continuous load safely. The connection requires a NEMA 14-50 outlet for plug in units like the Grizzl E Classic or ChargePoint Home Flex. Hire a licensed electrician if your panel lacks space or if you need new wiring run through the garage. Hardwiring is also an option for permanent installations, though the listed products use plugs.
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?
- The vehicle uses a J1772 connector. This model year falls in the industry's NACS transition, so many vehicles ship with a NACS port but include a J1772 adapter. Confirm your car's port before buying.
- How long does a full charge take?
- A Level 2 charge takes 13.7 hours at the maximum rate. The EPA rated charge time is 14.0 hours due to testing conditions. Standard Level 1 household charging takes 91 hours.
- What charging speeds will I get?
- Level 2 equipment delivers 22 miles of range per hour. Level 1 charging delivers 3.3 miles of range per hour.
- Can I use a portable charger?
- Yes. The Grizzl E Mini Portable works on 120 V or a 240 V outlet and delivers 40 amps of power.
Other vehicles
Charging times derived from EPA data for the 2025 Mercedes-Benz EQS 680 Maybach. Electrical requirements follow NEC 625.41, which sizes a circuit at 125% of a continuous load. Always have a licensed electrician verify your panel.