How to Read EV Charger Specs: kW, Connectors and Networks

A charger listing can look like a wall of numbers and letters: a kW rating, a connector name, an app you have never heard of. Once you know what each part means, though, a listing really tells you three simple things — how fast it will likely charge, whether your car can plug in, and how you will pay. This guide walks through each piece in plain terms so you can judge a listing before you make the trip.

What does the kW rating actually tell you?

kW (kilowatts) is the power rating, or loosely, how fast energy can flow into your car. A bigger number generally means a shorter stop, but the figure on a listing is a ceiling, not a promise.

• It is a maximum, not a guarantee. The charger, your car, how full the battery is and even the weather all cap the real speed, so you will often draw less than the headline number.
• Your car has its own limit. A charger may be rated high, but your vehicle only accepts up to its own maximum, and the slower of the two wins. Confirm your car's figure in its manual or with the carmaker.
• A number to picture it. As an illustration only, you might see a single-digit kW figure on a home-style AC point and a much larger one on a roadside DC unit; treat either as the best case and check the live output in the charger's app, not the poster.

AC or DC — what is the difference?

These two letters appear on almost every listing, and they tell you what kind of charging to expect.

• AC is the everyday, slower kind. It is what home and many destination chargers use, with the conversion happening inside your car, which keeps the power modest. It suits an overnight park or a long stay.
• DC is the fast kind. It converts power before it reaches the car, so it can push far more in, which is why you see it at highway stops and fast-charging hubs. It suits a quick top-up on the road.
• Match it to your plan. For a closer look at when each one makes sense, see fast versus slow charging.

Which connector does your car need?

This is the part that decides whether you can physically plug in at all. Local listings show a mix of connector types, and they are not interchangeable.

• Check your car's inlet first. Your vehicle came with specific AC and DC connector types, and a listing's connector has to match one of them or you simply cannot charge.
• AC and DC can use different shapes. Many cars use one connector for AC and another for DC, so read both lines on a listing rather than assuming one covers both.
• When in doubt, look it up. Our EV charging connectors guide explains the common types and which vehicles tend to use them, so you can recognise your own at a glance.

What network or app do you need?

Even with the right plug and the right speed, you usually need the matching app to start a session and pay for it.

• Most public chargers run on a network. The listing normally names it; you download that network's app, create an account, and start the charge from your phone.
• Set it up before you go. Registering and adding a payment method at home saves you standing at the charger fumbling with sign-ups. The EV charging apps and networks guides walk through what to expect.
• Fees are set by the operator. Pricing is decided per network and can change, so confirm the current rate in the app rather than trusting an older listing.

Frequently asked questions

Is a higher kW charger always better?

Not always. A higher rating only helps up to the limit your car accepts, and you may be paying for speed you cannot use. A fast DC charger is handy for a short errand stop, while an overnight or all-day park is perfectly fine on slower AC. Match the charger to how long you will actually be parked.

How do I know which connector my car uses?

Your vehicle's manual lists its AC and DC connector types, and the charging port itself is often labelled. If you are unsure, the connectors guide covers the common shapes used locally. Confirm with your dealer or the carmaker before relying on any particular charger.

Will the charger reach its advertised speed?

Usually not the full figure, and that is normal. The real rate depends on your car's own limit, how full the battery already is, the temperature and how busy the site is. Treat the listed kW as a best case and check the live output in the network's app.

Why do I need a separate app for each network?

Most operators run their own activation and payment system, so the app is how you unlock the charger and settle the bill. Set up the relevant accounts before a trip so you are not stuck registering on the spot. Because fees differ by operator and can change, always confirm the current rate in the app.