How many amps does a Level 2 EV charger need?

Level 2 charger amps, breaker size and plug-in vs hardwired

EV charging is treated as a continuous load. Under the 2023 NEC (the model code behind California’s 2025 Electrical Code, Title 24 Part 3, effective January 1, 2026), overcurrent protection for EVSE must be sized at not less than 125% of the equipment’s maximum load, and receptacles installed for EV charging need GFCI protection.^[1][2][3] ChargePoint’s Home Flex FAQ publishes the same 125% pairing for its adjustable settings.^[4]

*ChargePoint lists a 70 A or 80 A breaker for its 50 A Home Flex setting.^[4] Wire gauge depends on conductor type, insulation temperature rating and run length—use the charger manual and your electrician’s load calculation, not a one-size chart. For permits, inspection and other code steps, see California EV charger installation requirements (this page owns which amperage to buy).

Which amperage should you buy?

Buy for the slower of two limits: what your panel can spare, and what your car’s onboard charger can accept. ChargePoint says its 32 A and 40 A Home Flex settings are the most popular for most drivers; 48 A and 50 A are faster but more often need panel work.^[4]

• 32 A (40 A breaker): solid overnight charging for many commuting EVs; often fits tighter panels.
• 40 A (50 A breaker): common plug-in choice on a NEMA 14-50; matches many cars near 9.6 kW.
• 48 A (60 A breaker, hardwired): near the top of what most current home wall units and onboard chargers deliver (~11.5 kW at 240 V).
• 80 A (100 A circuit): uncommon for new home installs—see the section below.

Vehicle onboard charger limits (checked Nov 4, 2026)

Your wall unit cannot push more AC into the car than the onboard charger accepts. These figures come from each automaker’s own pages, checked tonight:

Tesla’s public onboard-charger support page blocked our fetch tonight, so Tesla models are omitted from this table rather than guessed. Check your car’s charging screen or owner’s manual for the exact amp limit.

NEMA 14-50 plug-in vs hardwired

A NEMA 14-50 is a 50 A receptacle. Continuous EV charging on that outlet is capped at 40 A (80% of 50 A), which is why ChargePoint allows Home Flex plug-in installs only on 40 A or 50 A circuits for the 32 A and 40 A settings—not for 48 A or 50 A.^[4] Anything above 40 A continuous needs a hardwired branch circuit. NEC 625.54 requires GFCI protection on receptacles installed for EV charging; hardwired units follow the charger maker’s instructions (many already include CCID / ground-fault protection).^[1]

Do you need an 80 A charger?

Most current home Level 2 units top out around 48–50 A. An 80 A wall unit is a different install. Tesla’s older 80 A single-phase Wall Connector installation manual rates the unit at up to 80 A (about 19 kW at 240 V) and calls for a maximum 100 A circuit breaker when set to supply 80 A to the vehicle; it also lists 3 AWG 75°C copper for most 100 A branch circuits, with smaller jobs sized to local code.^[5] You also need a vehicle whose onboard charger can actually accept that much AC—many popular CA models publish onboard limits near 11–11.5 kW, so an 80 A circuit would not make those cars charge faster overnight.

Panel capacity: upgrade vs load management

A 48 A or 80 A setting only works if the service has room after a proper load calculation. If capacity is tight, a lower labeled amp setting or load management can keep you from upsizing the panel. Compare those paths in panel upgrade vs load management, and see what a 100 A to 200 A job looks like in Los Angeles in electrical panel upgrade in Los Angeles.