What EV Charger Do You Need for a 2022 Mercedes-Benz EQB 300?
Plugging into a Level 2 charger takes 8.4 hours for a full battery. That speed easily covers normal daily driving habits overnight. You need a 40 amp unit to match the car.
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 8.4 hours |
| Range added per hour (Level 2) | about 29 miles |
| Full charge on a 120 V outlet | about 56 hours |
| Range added per hour (120 V) | about 4.3 miles |
| EPA rated range | 243 miles |
| Energy for a full charge | about 81.0 kWh at the wall |
Why 40 amps and not more
Your car accepts a maximum of 40 amps for AC charging. Buying a larger charging station will not speed up your sessions. The vehicle onboard hardware caps power intake at 9.6 kW anyway. Feeding it more current wastes money on hardware the car cannot use. Stick to the 40 amp recommendation.
What the install involves
You need a 50 amp breaker to feed the circuit properly. The charging setup uses a NEMA 14-50 outlet. Hardwiring is also an option if you want a permanent install outdoors. Call an electrician to verify your panel capacity before plugging anything in. Municipal codes require permits for new high amp circuits.
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 plug does this car use?
- It uses a standard J1772 connector. Every non-Tesla EV sold in North America through 2024 uses this plug for AC Level 2 charging.
- Can I use a standard wall outlet?
- You can plug into a standard household outlet for Level 1 charging, but it takes 56 hours for a full tank. That yields about 4.3 miles of range per hour.
- How many miles of range do I get per hour on Level 2?
- You add 29 miles of range for every hour connected to a proper 240 volt supply. The EPA test confirms this exact rate.
- Which chargers work with this vehicle?
- Units like the Grizzl-E Classic 40A and ChargePoint Home Flex NEMA 14-50 supply the exact amperage your car needs. Both options plug directly into a 14-50 outlet.
Other vehicles
Charging times derived from EPA data for the 2022 Mercedes-Benz EQB 300. Electrical requirements follow NEC 625.41, which sizes a circuit at 125% of a continuous load. Always have a licensed electrician verify your panel.