How Long Does It Take to Charge an EV?

How long it takes to charge an EV depends mainly on the method and the battery size. As a rough guide, a 3-pin granny charger at around 2.3kW can take well over a day for a large battery, a 7.4kW home wallbox charges most cars overnight, a 22kW connection is faster only if your supply and car support three phase, and a rapid DC charger can add most of a charge in under an hour. The single biggest factors are how much power you can draw and how big your battery is. To make sure your cable is not the limiting factor, check it with the cable finder by car.

At a glance: rough charging times

How long on a 3-pin granny charger?

A long time, which is why it suits backup use. At around 2.3kW a portable 3-pin charger adds roughly 8 to 10 miles of range per hour, so a mid-sized battery can take well over a day from low to full. That is fine for topping up a plug-in hybrid or a low-mileage EV overnight, but too slow as an only solution for higher mileage. Always plug it straight into a wall socket on its own circuit, never through an extension lead or multi-way adapter.

How long on a 7.4kW home wallbox?

Most cars charge overnight, which is why 7.4kW is the everyday standard. At around 25 to 30 miles of range per hour, a typical battery goes from low to full in the space of a night on a standard single-phase home supply. This is the sweet spot for most drivers: cheap on an off-peak tariff, gentle on the battery, and ready by morning. A 5m cable suits most driveways and wallbox positions.

How long at 22kW?

Potentially faster, but only if everything supports it. A 22kW connection is 32A three phase, so it needs a three-phase supply and a car that accepts high AC speeds, both of which are uncommon at home. Plug a 22kW cable into a single-phase home or a car that caps AC at 7.4kW and you still charge at 7.4kW. So 22kW is genuinely quicker only at three-phase sites with a capable car, otherwise it is future-proofing rather than speed.

How long on a rapid DC charger?

Often under an hour for the useful part of a charge. Rapid chargers run at 50kW to 350kW and feed DC straight to the battery, so a capable car can add a large chunk of range during a short stop. Speed tapers as the battery fills, so drivers usually charge from around 10 to 80% rather than to full. Rapid charging is for journeys, and it costs more per unit than charging at home.

What else affects charging time?

Several factors shift the numbers, so treat all figures as approximate.

• Battery size: a bigger battery holds more energy, so it takes longer to fill.
• Starting and target charge: topping up 20 to 80% is far quicker than a full charge.
• Temperature: a cold battery charges more slowly, especially on rapid DC.
• Car onboard charger: caps AC speed, commonly at 7.4 or 11kW.
• Supply and cable: the weakest link sets the ceiling.

Because of these, published times are guidance rather than a promise for your exact car and conditions.

Quick tool: see realistic charge times for any car with our free EV charging time calculator (granny plug, 7kW, 22kW and rapid DC).

Frequently asked questions

How long to charge an EV overnight at home?

On a 7.4kW wallbox, most cars charge from low to full comfortably within a typical overnight window. At around 25 to 30 miles of range per hour, even a fairly large battery is usually ready by morning. Exact time depends on battery size, starting charge, and temperature, so treat it as a general guide rather than a fixed figure.

Is it quicker to charge from 20 to 80%?

Yes, much quicker than a full charge, especially on rapid DC where the rate tapers near the top. Charging from around 20 to 80% avoids the slow final stretch and is gentler on the battery. Many drivers use this window for daily charging and only fill to 100% when they need the extra range for a long trip.

Does battery size change the time a lot?

Yes. A larger battery stores more energy, so at the same power it takes longer to fill. A small battery might charge overnight in a few hours on a wallbox, while a large one uses most of the night. When comparing charging times, always factor in your car battery capacity, not just the charger rating.

Why does the last 20% take so long?

Because the car tapers the current as the battery approaches full to protect the cells. This is most obvious on rapid DC, where charging is quick to around 80% then slows sharply. On a home wallbox the effect is gentler. It is normal behaviour, which is why 10 to 80% times are often quoted for rapid charging.

Can I charge faster with a 22kW cable?

Only where your supply and car both support three phase. On a single-phase home or a car that caps AC at 7.4kW, a 22kW cable still charges at 7.4kW. So it is worth it only for three-phase sites with a capable car, otherwise a 7.4kW cable gives the same speed for less weight and cost.

Does cold weather slow home charging?

A little on AC and more on rapid DC. A cold battery accepts less current, so charging can be slower on a frosty morning. The effect is usually modest on a home wallbox and clears as the battery warms during charging. Preconditioning, where your car supports it, helps most before a rapid stop.

To sum up, method and battery size drive charging time, so match the tier to your needs and treat figures as guidance. For a fuller breakdown of the tiers, read EV charging speeds explained and how long to charge an EV on a 3-pin plug. When you are ready to buy, use the cable finder by car or keep a portable charger as backup.