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Charging an electric car: speeds, plugs and habits

Charging is the biggest change when you move from petrol or diesel to electric. Instead of a weekly trip to a station, most charging happens while the car is parked anyway. Here is how the main options work and how to plan around them.

Two kinds of current

Electricity comes from the grid as alternating current (AC), but a battery stores direct current (DC). Every car has an on-board charger that converts AC to DC, and its size limits how fast AC charging can go. Fast public chargers skip that step: they convert power in the charging station and feed DC straight into the battery.

  • AC charging: slower, cheaper, found at homes, workplaces, car parks and many public points.
  • DC fast charging: much faster, used on trips, and usually more expensive per unit of energy.

Where you can charge

  1. Normal household socket: very slow, fine for topping up overnight if your daily distance is small. Use it only on an installation that is in good condition, and ask an electrician if you are unsure that it can handle hours of continuous load.
  2. Home wall box: installed by a qualified electrician. Much faster than a household socket and often the cheapest option per kilometre.
  3. Workplace or destination charging: shops, hotels and car parks that offer AC points while you do something else.
  4. Public fast chargers: typically along main roads, for longer journeys.

If you live in an apartment without your own parking space, check realistically where you would charge before buying. It is the most common reason people regret an EV.

How long does it take?

Charging time depends on three things: the size of the battery, the power of the charger and the power your car can accept. A car can only charge as fast as the weakest link. Fast charging also slows down as the battery fills, so the last part takes noticeably longer than the first. That is why people on trips often charge to about four-fifths and then drive on, instead of waiting for a full battery.

Connectors

Different regions and generations of cars use different plug types, and an adapter is not always possible. Before you buy, make sure the car's plug fits the chargers you would use, and that the charging cable is included. A cable for a public AC point is usually carried in the car.

Payment and apps

Public charging networks differ in how you pay: a card, a phone app or a subscription. Prices can vary a lot between networks and between slow and fast points, so look at the price per unit of energy before plugging in. Keep one or two apps ready, and have a plan B nearby, since chargers may be busy or out of order.

Battery-friendly habits

  • For daily use, avoid keeping the battery at 100 percent or near empty for long periods. Many makers suggest a charge limit setting for everyday use.
  • Use fast charging when you need it, not as a habit if slower charging is available.
  • Avoid leaving the car for weeks fully charged or almost empty.
  • Follow your manual: recommendations differ between battery types.

More on this in EV battery health when buying used.

Charging in cold weather

A cold battery accepts power more slowly, so charging takes longer, and the car also uses energy to warm itself. Pre-conditioning the battery while the car is plugged in, if your car supports it, helps. See EV winter range.

Planning a long trip

Plan stops before you leave, using a route planner that understands your car. Leave margin, because headwinds, cold or a detour will increase consumption. Combine charging with meals or breaks. Our trip cost calculator can help estimate the energy cost of a journey, and the general advice in road trip preparation also applies.

Plug-in hybrids

Plug-in hybrids charge in the same ways but usually accept much lower charging power. A home socket or a wall box is usually enough. See hybrid types explained.

Safety

  • Use proper charging equipment and cables in good condition.
  • Do not use damaged cables, or plug a cable that is hot or wet.
  • Do not use long, thin extension cables for a long charge.
  • Have home wiring checked by a qualified electrician before installing a wall box.

What to remember

  • AC is slow and cheap, DC fast charging is quick and costs more.
  • Home or work charging makes ownership easy; no charging at all makes it hard.
  • Check the plug type before buying.
  • Gentle charging habits protect the battery.
  • Plan long trips and keep a backup option.

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General information, not legal or professional advice. Rules, fees and deadlines differ between countries and change over time. Check current rules with the competent authority, and ask a qualified professional about your own situation.

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