Every EV charge happens on one of three rungs of the same ladder. The rungs aren’t marketing tiers — they’re defined by where the AC-to-DC conversion happens and how much power the wiring allows. Understanding that one fact explains nearly every charging spec you’ll ever read.

Level 1 — the wall outlet (1.2–1.9 kW)

Level 1 is a regular household receptacle: 120 volts, on a circuit shared with whatever else is plugged in nearby. The portable EVSE that ships with most EVs caps itself at 12 amps continuous — a safety convention (the 80% rule: continuous loads may use at most 80% of a 15-amp circuit’s rating) — so real-world Level 1 delivers about 1.4 kW.

That adds roughly 3–5 miles of range per hour. It sounds hopeless until you do the arithmetic: a car parked 12 hours overnight recovers 40–55 miles — more than the average American commute (about 30 miles round-trip). Level 1 genuinely works for plug-in hybrids with small packs and for low-mileage drivers. For a 75 kWh battery it’s a last resort: 20→80% is about 43 kWh, or over 30 hours at 1.4 kW.

Level 2 — the 240-volt circuit (3.3–19.2 kW)

Level 2 uses 208–240 volts — the same class of circuit as an electric dryer or range. The J1772 spec allows up to 80 amps, so the theoretical ceiling is 19.2 kW, but installed hardware clusters much lower:

EVSE / circuit	Breaker	Power	Miles/hour*
16 A plug-in (NEMA 6-20)	20 A	3.8 kW	~12
24 A	30 A	5.8 kW	~18
32 A (NEMA 14-50)	40 A	7.7 kW	~25
40 A	50 A	9.6 kW	~31
48 A hardwired	60 A	11.5 kW	~37
80 A hardwired	100 A	19.2 kW	~60

*at ~3.3 mi/kWh; your car’s efficiency moves these numbers.

Two caps matter here. The circuit cap (breaker × 80% × voltage) is what the wiring can supply. The onboard charger cap is what the car can convert — and it’s the lower number that wins. Most EVs accept 7–11.5 kW on AC; a handful (Lucid Air, some trucks) reach 19.2 kW. A 19.2 kW EVSE feeding a car with a 7.4 kW onboard charger is a 7.4 kW system. The home charger sizing guide walks the breaker math.

DC fast charging — the conversion moves outside (24–350+ kW)

DC fast chargers skip the car’s onboard charger entirely: the station itself converts grid AC to DC and feeds the battery almost directly. That’s why the power jumps by an order of magnitude — the conversion hardware no longer has to fit inside the car.

The connector alphabet:

• CCS1 (Combined Charging System): the non-Tesla standard in North America; spec supports up to 350 kW (500 A at 700+ V). Most non-Tesla DC hardware.
• NACS (North American Charging Standard): Tesla’s connector, now standardized as SAE J3400 and adopted by essentially every major automaker for North America. V3 Superchargers peak at 250 kW; V4 cabinets push higher.
• CHAdeMO: the legacy Japanese standard, largely frozen at ~50–62.5 kW and fading from new installs.

Station nameplates run 50, 150, 250 and 350 kW — but the station’s rating is a ceiling, not a promise. Your car’s peak acceptance (45 kW for a Leaf, ~150–270 kW for modern 800-volt platforms) caps the session first, and then the battery’s charging curve pulls the rate down as it fills. A “350 kW” charger feeding a car that peaks at 150 kW is a 150 kW session — before taper. The taper article explains the curve; the calculator models it.

So which level do you actually use?

• Daily driving, home available: Level 2, sized to your car’s AC limit. Overnight covers anything.
• Light miles or a PHEV: Level 1 may be enough — do the overnight-hours math before buying hardware.
• Road trips: DC fast, and plan stops around the fast part of the curve (details).
• Apartment without plugs: rely on workplace/public Level 2 plus occasional DC — workable, but price the DC honestly with the cost math.

One more honest note: the levels describe power delivery, not quality. A flaky 150 kW station that reports derated power is a worse experience than a solid 7 kW post that delivers every night. Networks publish real-time status — on a trip, check it before you commit to a stop.

Frequently asked questions

Can I use a 350 kW charger on a car that only accepts 100 kW?

Yes — the car and station negotiate, and the car takes only what it can handle. You'll simply never see the station's peak; the session caps at your vehicle's limit, then tapers further as the battery fills. No harm done, but no bonus either.

Is Level 2 charging bad for the battery compared to Level 1?

No evidence supports that at normal home rates. Even 11.5 kW AC is a gentle ~0.15 C rate for a 75 kWh pack — far below anything that stresses cells. The meaningful battery-health variable is state of charge and heat, not which AC level fed it.

What happened to CHAdeMO?

It's a legacy standard now. In North America, CCS1 and NACS (Tesla's connector, standardized as SAE J3400) won; Nissan's Ariya moved to CCS, and new CHAdeMO installations have essentially stopped. Leaf owners use adapters where networks still support them.

Why is my Level 2 charger only giving my car 6.6 kW?

Because the car's onboard charger is the bottleneck — many EVs accept only 6.6–7.4 kW AC regardless of the EVSE's rating. The EVSE advertises what it can supply; the car draws what it can convert. Check your vehicle's AC acceptance spec before upsizing hardware.

Do public 'Level 2' stations charge at the full 19.2 kW?

Rarely. Public AC stations typically deliver 6–7 kW per port — fine for hour-long stops, useless as a fast option. A few sites share power across ports, dropping per-car rates further when both plugs are busy.