What EV Charger Do You Need for a 2024 Mercedes-Benz EQB 300?
Many owners buy a 48 amp or 50 amp charger by default and waste money on capacity your vehicle cannot accept. Your Mercedes-Benz EQB 300 caps its AC intake at 40 amps. You need a 40 amp Level 2 setup to hit the maximum home charging speed.
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 8.3 hours |
| Range added per hour (Level 2) | about 25 miles |
| Full charge on a 120 V outlet | about 55 hours |
| Range added per hour (120 V) | about 3.7 miles |
| EPA rated range | 205 miles |
| Energy for a full charge | about 79.3 kWh at the wall |
Why 40 amps and not more
The car draws 9.6 kW max on AC power. Feeding it a larger 48 amp or 50 amp unit changes nothing because the onboard charger dictates the limit. Extra hardware costs more cash without speeding up the 8.3 hour replenishment time from empty to full. You add 25 miles of range every hour on a 40 amp circuit. Stick to the recommended 40 amp specification.
What the install involves
Hooking this up requires a 50 amp breaker to feed the load safely. You will plug into a NEMA 14-50 outlet using the J1772 connector. Hire a licensed electrician if you lack a 240 volt circuit in your garage or parking spot. They must run heavy gauge wire and mount a proper receptacle rated for continuous current.
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
- Can I plug this car into a standard wall outlet?
- Yes, standard 120 volt Level 1 charging works, but it takes 55 hours for a full charge. You only recover 3.7 miles of range per hour this way. Most drivers install a 240 volt Level 2 setup instead.
- What connector does the car use?
- Your vehicle uses a J1772 connector for AC Level 2 charging. Every non-Tesla EV sold in North America through 2024 uses this standard port. You do not need an adapter for standard home chargers.
- How long does a full charge take at home?
- A Level 2 charger at the maximum 40 amp rate finishes the job in 8.3 hours. The 79.3 kWh battery goes from empty to full overnight. You get 25 miles of range per hour.
- Should I buy a portable charger or a wall unit?
- Both options work if they supply 40 amps. Units like the Grizzl-E Classic or ChargePoint Home Flex plug straight into a NEMA 14-50 outlet. Pick the format that fits your garage layout.
Other vehicles
Charging times derived from EPA data for the 2024 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.