Build Your EV Charging Setup
Pick the charger, amperage, and install method — see specs and charging speed update live.
Charger Type
Tesla's hardwired wall charger. Works with any Tesla and also includes a J1772 adapter for non-Tesla EVs. Configurable up to 48A continuous.
Amperage (continuous)
Continuous amps = what the charger actually pulls. NEC requires the breaker to be sized at continuous ÷ 0.8, so a 48A charger runs on a 60A breaker.
Wire / Install Method
Your Setup
Most popular~4.0 mi/kWh — most efficient EVs sold today
Why THHN at 48A: Romex (NM-B) terminates at the 60°C column, capping #6 at 55A — not enough headroom for a 60A breaker. THHN in conduit uses the 75°C column, where #6 carries 65A.
Final pricing depends on panel headroom, run distance, and trenching. Your electrician will quote it on-site.
The three setups we install most
Mi/hr shown for a Tesla Model 3/Y.
Best for renters, Tesla Mobile Connector users (32A continuous), or anyone who wants the flexibility to take a portable charger with them.
Solid entry-level hardwired option. Works with any 40A-capable Level 2 charger — Enphase IQ, ChargePoint, Grizzl-E, Wallbox, JuiceBox.
Best for daily Tesla drivers who want max practical home charging speed. The Tesla Universal Wall Connector also works with non-Tesla EVs via its built-in J1772 adapter.
Plug-in vs. Hardwired
Plug-in (NEMA 14-50)
- Portable — take it with you if you move
- Works with Tesla Mobile Connector and any plug-in EVSE
- —Caps at 40A continuous (50A breaker max)
- —Requires GFCI breaker
Hardwired
- Up to 48A continuous — faster charging
- Cleaner look, no failure point at the plug
- Required for outdoor installs
- —Charger is fixed in place
Why wire type matters
Same gauge, different code path. Romex vs. THHN explained.
The NEC 80% rule says continuous loads (3+ hours, like EV charging) can only use 80% of a circuit's ampacity. So the breaker is always sized larger than the charger's continuous draw — and the wire has to support the breaker.
But the wire's allowed ampacity depends on its termination temperature rating:
- Romex (NM-B):terminates at 60°C. We have to use the conservative 60°C column in NEC table 310.16. #6 NM-B = 55A ampacity → max 50A breaker → max 40A continuous.
- THHN in conduit:terminates at 75°C. We can use the more generous 75°C column. #6 THHN = 65A ampacity → supports a 60A breaker → 48A continuous.
| Copper wire | NM-B / Romex (60°C) | THHN in conduit (75°C) |
|---|---|---|
| #8 | 40A → 40A breaker → 32A continuous | 50A → 40A breaker → 32A continuous |
| #6 | 55A → 50A breaker → 40A continuous | 65A → 60A breaker → 48A continuous |
| #4 | 70A → 70A breaker → 56A continuous | 85A → 80A breaker → 64A continuous |
Ampacity values from NEC table 310.16, copper conductors. Real installs also factor in conduit fill, ambient temperature, and bundling — your electrician handles those on-site.
Charging speed by vehicle
Same amperage, different miles per hour — depends on your EV's efficiency.
| Vehicle | 32A continuous | 40A continuous | 48A continuous | Time to add 100 mi @ 48A |
|---|---|---|---|---|
Tesla Model 3 / Y ~4.0 mi/kWh — most efficient EVs sold today | ~30 mi/hr | ~37 mi/hr | ~44 mi/hr | ~2h 16min |
Tesla Model S / X ~3.4 mi/kWh — larger, heavier sedans/SUVs | ~26 mi/hr | ~31 mi/hr | ~37 mi/hr | ~2h 42min |
Ford F-150 Lightning ~2.0 mi/kWh — full-size electric truck | ~15 mi/hr | ~19 mi/hr | ~22 mi/hr | ~4h 33min |
Rivian R1T / R1S ~2.3 mi/kWh — full-size electric truck/SUV | ~17 mi/hr | ~22 mi/hr | ~26 mi/hr | ~3h 51min |
Generic Level 2 EV ~3.0 mi/kWh — average modern EV | ~22 mi/hr | ~28 mi/hr | ~34 mi/hr | ~2h 56min |
Approximations based on each vehicle's typical real-world efficiency. Cold weather, charge curve at high state-of-charge, and battery preconditioning can move these numbers ±15–20%.
Does your panel have room?
If it's full or undersized, we pair the EV install with a panel or service upgrade.
Every install includes
Brands we install: Tesla · ChargePoint · Grizzl-E · Enphase · Emporia · Wallbox · JuiceBox · and any other UL-listed Level 2 charger.
Common questions
Ready to install your EV charger?
Free on-site assessment. Your electrician walks the panel, the wire run, and confirms the right amperage with you in person — then quotes the install transparently.