Standing at an unfamiliar charger, read the kW rating and look at the connector. A rating of 50 kW or more, a thick cable and a large cabinet mean DC fast charging. A smaller post rated around 7–19 kW with a plain J1772 or Type 2 connector is AC Level 2 — the power class and the connector together settle it in seconds, before you plug in.
Key Takeaways
- Read the rating first: 7–19 kW is AC Level 2; 50–350 kW is DC fast charging.
- DC hardware is unmistakable up close — big cabinet, thick tethered cable, CCS or CHAdeMO connector.
- NACS plugs serve both power types, so on NACS units the rating decides.
- A 22 kW post is three-phase AC, not a small DC charger.
The Five Checks, Side by Side
| Check | AC Level 2 post | DC fast charger |
|---|---|---|
| Cabinet | Slim post or wall box, roughly the size of a parking meter or a small cabinet | Large cabinet, often fridge-sized, sometimes with a separate power unit nearby |
| Cable | Relatively thin and light; sometimes you bring your own (common with European Type 2 posts) | Thick, heavy cable — high-power units are liquid-cooled — always tethered |
| Connector | J1772 (North America) or Type 2 (Europe) | CCS1 or CCS2, CHAdeMO, or NACS on a DC-rated unit |
| kW rating on the label or screen | About 7–19 kW | 50–350 kW |
| Wording | “Level 2”, “AC”, “destination charging” | “DC fast”, “rapid”, “ultra-rapid”, “HPC” |
The rating check is the most reliable because it follows the U.S. DOT’s bands: Level 2 runs 7–19 kW and adds about 10–20 miles of range per hour, while DC fast charging runs 50–350 kW and adds roughly 180–240 miles per hour. Anything in the middle of those ranges — a 22 kW post, for example — is AC in practice.
The Connector Shortcut
If the rating is worn off the label, the connector tells the same story:
- J1772 only: AC. The round North American plug carries AC power; a DC session needs the two extra pins of a CCS1 connector below it.
- CCS (Combined Charging System): DC. The combined plug is built for fast charging — NEVI-funded corridor stations are required to offer CCS1 on their DC ports and J1772 on Level 2 ports.
- NACS: Either. The same Tesla-style plug serves AC and DC, so go back to the kW rating and cabinet size.
- Type 2 (Europe): AC by itself; a Type 2 plug extended into the longer CCS2 shape is DC.
For the background on why the two power types exist at all, see our explainer on whether EV chargers are AC or DC. Once you have identified a DC unit, the step-by-step guide to using a DC fast charger covers the session itself.
Why It Matters Before You Plug In
- Time planning. An AC post suits a parked hour or more; a DC unit is a 20–40 minute stop. Arriving at the wrong type breaks the plan, not the car.
- Compatibility. Most plug-in hybrids can only charge on AC, and every car needs the right connector — the identification checks double as a compatibility check.
- Price expectations. DC sessions are normally the premium option, and some operators add idle fees once charging finishes. Knowing the class before you start avoids surprises.
The Two Classes in EVDANCE Hardware
The distinction is just as visible in our own range. The EV-AC03201T is an AC station: two Type 2 connectors sharing up to 43 kW (22 kW per connector), OCPP 1.6J, IP54 — post-sized hardware for car parks and workplaces. The EV-RHDC30K-L is the DC counterpart: a compact fast charger of 22 kW with OCPP 1.6J and an IP54 enclosure — smaller than a corridor unit, but still a cabinet with a tethered DC cable, not a slim post. Side by side, you would never mistake one for the other.
Frequently Asked Questions
A post is rated 22 kW. Is that AC or DC?
AC, in almost every case. It sits above the DOT’s 7–19 kW Level 2 band because it is a three-phase European rating, but the power type is AC and the connector will be Type 2 or CCS-free. DC fast charging starts at the 50 kW band.
The screen shows kW but the word “DC” appears nowhere. How can I be sure?
Combine two checks: the rating band (50 kW or more means DC) and the connector (CCS or CHAdeMO means DC). Either one alone is persuasive; together they are conclusive.
Can plugging into the wrong type damage my car?
No. If the connector fits, the car and charger negotiate a session the car accepts; if it does not fit, nothing connects. The real cost of a misidentification is time — an hour parked at an AC post when you needed a fast stop.
Related Reading
- Are EV Chargers AC or DC?
- How to Use a DC Fast Charger: Step by Step
- Is DC Fast Charging Level 3?
- How Do DC Fast Chargers Work?
