EV Charging Explained: A Complete Beginner's Guide
EV charging works in two ways. AC charging feeds alternating current to your car, which converts it to DC on board — this is slow (typically 3.7–22 kW) and is what you use at home, at work and at most on-street posts. DC fast charging converts the power outside the car and pushes it straight into the battery at 50–350 kW, which is what you use on a road trip. Everything else — connectors, cables, apps, pricing — exists to connect those two modes to your specific car.
If you have just switched to an electric car, the charging world can look like an alphabet soup: CCS, CHAdeMO, Type 2, NACS, Level 2, kW, kWh. It is far simpler than it looks. This guide walks through the whole picture once, in order, and links to a deeper page for each part.
1. The two kinds of charging
Every charge you will ever do falls into one of two categories.
| AC charging | DC fast charging | |
|---|---|---|
| Where the conversion happens | Inside your car (onboard charger) | Inside the charging station |
| Typical power | 3.7 – 22 kW | 50 – 350 kW |
| Typical time for 100 km of range | 1 – 4 hours | 5 – 15 minutes |
| Where you find it | Home, workplace, on-street, car parks, hotels | Motorway services, retail parks, urban hubs |
| Cost per kWh | Lower | Higher |
| Best for | Overnight and "while parked anyway" | Topping up mid-journey |
The single most useful habit for a new EV driver is to stop thinking about "filling up" and start thinking about "topping up whenever the car is parked anyway". Read the full comparison in AC vs DC EV charging.
2. Connectors: which plug fits your car
The plug on the cable has to match the socket on your car. In practice there are four you will meet:
- Type 2 (Mennekes) — the AC standard across Europe. Also the AC half of CCS.
- CCS (Combined Charging System) — Type 2 with two extra DC pins underneath. The DC fast-charging standard in Europe and, as CCS1, widely used in North America.
- CHAdeMO — the older Japanese DC standard. Still supported by the Nissan Leaf and some earlier models; being phased out on new cars.
- NACS (SAE J3400) — the Tesla connector, now being adopted by most manufacturers in North America.
Your car will have one AC socket and, usually, one DC socket — often combined. Full detail, with a compatibility table, is in EV connector types explained.
3. What the numbers mean
Two units matter and they are easy to confuse:
- kW (kilowatt) is power — the rate at which energy flows. It is the number on the charging station: 7 kW, 50 kW, 150 kW.
- kWh (kilowatt-hour) is energy — the amount stored. It is the size of your battery: 40 kWh, 60 kWh, 100 kWh.
A rough rule: time in hours ≈ kWh you need ÷ kW you are getting. Adding 30 kWh at 50 kW takes about 36 minutes in theory — a little longer in practice, because charging slows down as the battery fills. See what kW means for EV charging for the real-world timings.
4. How much you actually need
Most drivers dramatically overestimate this. A typical European commute is under 40 km a day, which is roughly 7–9 kWh — about two hours on a 3.7 kW home socket, or 25 minutes at 22 kW. You almost never need a full charge; you need enough to get to the next convenient charge.
On a long journey the fastest strategy is usually several short stops in the 10–60% range rather than one long stop to 100%, because charging speed drops sharply above roughly 80%.
5. Paying and starting a session
Public charging is fragmented: some stations take a contactless bank card, some need the operator's app, some use an RFID card, and some are activated automatically when you plug in (Plug & Charge). Before you rely on a station, it is worth knowing which of those it uses — that is one of the things a charger-finder app is for.
The step-by-step version is in how to use a public EV charger.
6. Finding a charger that actually works
The hardest part of public charging is not the technology, it is arriving to find the charger occupied, broken or incompatible. Three things reduce that risk:
- Filter by connector and power before you set off, not when you arrive.
- Check live availability where the operator publishes it.
- Have a backup — pick a destination with more than one charge point where you can.
Voltika does all three on one map across more than 28,000 charging locations in 368 cities. You can also browse stations by city — for example London, Berlin, Istanbul or the full city directory.
7. Charging etiquette
Public chargers are a shared resource, and a handful of unwritten rules keep them usable: move off once you are done, do not unplug someone else's car, do not park in a charging bay without charging. The full list is in EV charging etiquette.