What EV Charger Do You Need for a 2027 Rivian R1S?
Plenty of owners waste money on an 80-amp home charger this vehicle cannot even use. Your Rivian R1S caps out at 48 amps for AC charging anyway. Buying a larger unit only burns cash for speed you will never see. Match the hardware to the car's actual limit.
The numbers
| Maximum AC charging rate | 11.5 kW (48 A) |
|---|---|
| Charger size to buy | 48 A |
| Circuit breaker required | 60 A |
| Outlet / connection | hardwired (a 48 A EVSE must be hardwired -- no household receptacle is rated for it) |
| Charge port | J1772 |
| Full charge on Level 2 | about 14.2 hours |
| Range added per hour (Level 2) | about 29 miles |
| Full charge on a 120 V outlet | about 114 hours |
| Range added per hour (120 V) | about 3.6 miles |
| EPA rated range | 410 miles |
| Energy for a full charge | about 163.7 kWh at the wall |
Why 48 amps and not more
The onboard charger handles up to 48 amps at 11.5 kilowatts. Plugging into a higher-amperage station changes nothing because the vehicle regulates the intake. You get 29 miles of range per hour of Level 2 charging at this rate. A completely drained 163.7 kWh battery pack fills in 14.2 hours. Pushing past 48 amps accomplishes nothing.
What the install involves
You need a dedicated 60-amp circuit paired with hardwired installation. A 48-amp continuous load melts standard household receptacles, which is why hardwiring is mandatory. Hire a licensed electrician to run heavy-gauge copper wiring from your main electrical panel to the parking spot. They will mount the unit and install the correct breaker.
Chargers that match this car
Energy monitoring built in. Hardwire it for the full 48 A.
Compact unit, good for tight garages.
Adjustable from 16 A to 50 A in the app, which helps if your panel is tight.
Worth having as well
Common questions
- Can I plug this into a regular wall outlet?
- No. Level 1 charging on a standard 120-volt household outlet yields 3.6 miles of range per hour and takes 114 hours to refill the battery.
- Why does the EPA charge time show 15 hours?
- The EPA test accounts for charging losses and efficiency dips during a standard cycle. Real-world max-rate charging finishes the job in 14.2 hours.
- What plug type does the car use?
- This model features a J1772 connector interface. Confirm your specific port setup because this model year falls in the industry transition to NACS.
- Do I need a 50-amp charger if the car draws 48 amps?
- Units like the ChargePoint Home Flex support 50 amps, but your car limits the draw to 48 amps. Set the charger configuration accordingly during installation.
Other vehicles
Charging times derived from EPA data for the 2027 Rivian R1S (covering 12 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.