Installing a circuit breaker is essential for any electrical device to prevent damage to wiring, motors, and panels when the current exceeds the design limit. Tesla recommends installing a breaker, a safety device to protect your vehicle.   Tesla recommends EV Charger Installations with a circuit breaker matching the vehicle’s onboard charger capacities. Meanwhile, a wall connector may be installed with a breaker of lower amperage (amps) to support the existing electrical system. To know your Tesla’s maximum amperage, click the lightning bolt icon on the touchscreen.   With power rated at 240V (KW), the maximum Wall Connector outputs and corresponding circuit breaker sizes are indicated below:   Max Output (amps)      Circuit Breaker (amps)  12                                         15 16                                         20 24                                        30 32                                        40 40                                        50 48                                        60   If you are installing a connector for the fastest charging, install a circuit breaker rated 100 amps. However, this power is not readily available in many homes or offices. Consequently, the High Power Wall Connector’s current setting can be adjusted or lowered for 40 to 100 amp breakers.   The logic behind the breaker’s size to install is that the circuit you will install must be able to deliver power at 80 percent of its rated capabilities, bringing us to the table above.