How long does it take to charge an electric car at home?
Charging time is battery size divided by charger power, plus a little patience near full. Here are the real numbers.
Charging an electric car at home takes about 5 hours for a typical 36kWh session (20% to 80% of a 60kWh battery) on a 7kW wallbox, or about 16 hours on a 2.3kW three-pin plug. A full 0 to 100% charge of a 60kWh battery takes about 8.5 hours at 7kW. Most UK homes cannot exceed 7kW because 22kW charging needs a three-phase supply.
How long does a 7kW home charger take?
Charging time is one division: kilowatt-hours to add, divided by kilowatts of power. A typical family EV carries about 60kWh of usable battery, and a typical session (20% to 80%) adds 36kWh.1
36kWh at 7kW = about 5 hours. A full 0 to 100% charge of the same battery is about 8.5 hours. Both fit inside an ordinary night, which is the entire point of home charging: you are asleep, the car is eating.
A useful sense of scale: 7kW adds roughly 24 miles of range per hour plugged in at 3.5 miles per kWh. A six-hour off-peak window, the sort you get on Intelligent Octopus Go from 23:30 to 05:30, adds about 42kWh or 147 miles.4 That is two or three average UK driving days recovered per night, from a box on the wall you stop thinking about by the second week.
How long does a three-pin plug take?
A standard 13A socket, fused down to 10A for continuous load, delivers about 2.3kW. The same 36kWh session takes about 16 hours, and a full 60kWh charge about 26 hours. Granny cable is the affectionate term, and the affection is thin: it will get you out of trouble at a relative’s house, and it will cover very low mileage, but as a routine it is the reason first-time EV owners book a wallbox within a fortnight.
Two safety notes if you do use one. Use a proper EV cable with an in-line control box (the brick), never a plain extension reel, which can overheat under sustained load. And check the socket is in good condition; 10A for 16 hours is a stern test of old wiring. If a socket or plug ever feels warm to the touch mid-charge, stop and have the circuit looked at before the next session.
How long does it take to charge popular EVs?
Times below use approximate usable battery capacities and the 20% to 80% session most drivers actually run. Your figures will vary slightly with temperature and the car’s onboard charger limit.1
| Car (approx. usable battery) | Session energy | At 7kW | At 2.3kW |
|---|---|---|---|
| Nissan Leaf 40 (about 39kWh) | 23.4kWh | About 3.3 hours | About 10.2 hours |
| VW ID.3 Pro (about 58kWh) | 34.8kWh | About 5.0 hours | About 15.1 hours |
| Tesla Model Y (about 60kWh) | 36kWh | About 5.1 hours | About 15.7 hours |
| MG4 Long Range (about 62kWh) | 37.2kWh | About 5.3 hours | About 16.2 hours |
Notice how flat the spread is: because home charging happens overnight, the difference between the smallest and largest battery here is about two hours of sleep you were having anyway. Charging speed matters far more on public rapid chargers mid-journey than it does on your wall.
How do you estimate your own charging time?
The formula is always the same: hours = kWh to add / charger kW. To get the kWh to add, multiply your battery’s usable size by the percentage you plan to cover. A driver with a 77kWh battery going from 30% to 80% is adding 50% of 77kWh, or 38.5kWh. At 7kW that is 5.5 hours; at 2.3kW it is 16.7 hours.
Two refinements worth knowing. First, charging is not perfectly efficient: the car and charger together lose roughly 10% of the energy as heat and conversion overhead, so a 36kWh fill actually draws about 40kWh from your meter. Add 10% to any time estimate for the same reason.1 Second, your car’s onboard AC limit can cap the rate below 7kW on a handful of older or smaller models, so check the specification sheet if the maths and the dashboard disagree.
How long do plug-in hybrids take to charge?
Plug-in hybrids carry much smaller batteries, typically 12 to 18kWh, but many limit AC charging to 3.6kW. The result lands in a familiar place: a full charge takes about three to five hours, still an overnight job. The difference is what you get for it, perhaps 30 to 40 miles of electric range, which is exactly why PHEV owners who plug in religiously run most of their miles on electricity and owners who do not are driving a heavy petrol car.
Why does your app show a different time?
Dashboard and app estimates factor in things the simple division ignores: battery temperature, the car’s current charge limit, charging losses of roughly 10%, and any scheduled window you have set. Treat the app as the honest figure for tonight and the formula as the honest figure for planning. When the two disagree by more than about 20%, the usual suspects are a charge limit set below 100%, a cold battery, or an AC limit on the car itself.1
What limits home charging speed?
Four bottlenecks, in the order you will meet them:
- The circuit. A dedicated home chargepoint runs at 32A on a single phase, giving 7kW. That is the UK domestic ceiling for nearly everyone.
- Your main fuse. Older 60A supplies can struggle when the charger competes with an electric shower. Modern chargers solve this with load balancing, throttling themselves when the house draws heavily.
- The car’s onboard charger. AC charging speed is set by the car, not the wallbox: most EVs cap at 7kW or 11kW, so a more powerful wallbox changes nothing.
- Battery temperature. A cold-soaked battery in January charges more slowly than a warm one; the car spends energy heating the pack before it accepts full power.
What is the difference between AC and DC charging?
Home charging is AC: the wallbox delivers alternating current and the car’s onboard charger converts it to DC for the battery. That onboard charger is the bottleneck, and most EVs limit AC charging to 7kW or 11kW regardless of what the wallbox can offer.
Public rapid and ultra-rapid chargers are DC: they convert the current in the cabinet and feed the battery directly, bypassing the onboard limit. That is how they reach 50kW to 350kW. The UK had 12,921 ultra-rapid chargers of 150kW and above by spring 2026.2 DC units cost tens of thousands of pounds and need industrial power supplies, which is why nobody installs them at home.
Why does charging slow down near full?
Batteries do not like being brimmed. Above about 80%, the car’s battery management system tapers the charge rate to protect cell life, the same way you pour a pint slower near the top. On DC rapid chargers the taper is dramatic, which is why road-trip advice is to charge to 80% and go. On a 7kW home charger the effect is mild, but the last few percent still crawl, and charging to 100% every night ages the battery faster.
The practical rule: set the daily limit to 80%, and only charge to 100% before a long trip. Your future self, selling the car at 90,000 miles with its battery health report, will thank you.
Does cold weather change charging time?
Yes, in two ways. A cold battery accepts charge more slowly while the car warms its own pack, adding perhaps 15 to 30 minutes to an overnight session in a hard frost. And winter efficiency drops across the board, so each kWh delivers fewer miles, meaning you charge more often rather than just more slowly. Neither changes the practical advice: plug in overnight, let the car’s preconditioning handle the battery temperature while it is still connected to the wall, and budget your winter range at about three-quarters of the summer figure.
Is it cheaper to charge little and often or in one go?
Neither: you pay for kWh, not sessions, so the total cost is the same either way. The reasons to charge little and often are about the window, not the wallet. Topping up nightly inside the cheap hours keeps you in off-peak rates without ever needing a long daytime session at full price, and it keeps the battery in the comfortable 20% to 80% band. The only session-level cost worth remembering is that roughly 10% charging loss, which you pay on every fill regardless of size.1
Can you charge faster than 7kW at home?
Only with a three-phase supply. A 22kW charger needs three-phase power, and the overwhelming majority of UK homes are single-phase. Upgrading means new cabling from the street, a new meter and a four-figure bill from your distribution network operator, and then you discover your car’s onboard AC limit is 11kW anyway. For nearly every household, the honest answer is that 7kW is the ceiling, and it is a perfectly good one. The full comparison is in our 7kW vs 22kW guide.
One more quiet rule worth knowing: since June 2022, every new home charger sold in Great Britain must default to charging outside peak grid hours and apply a randomised delay of up to 10 minutes at session start.3 So if your car does not begin charging the instant you plug in at 23:30, that is not a fault. That is the law, working as designed.
- Key facts
- 36kWh at 7kW
- About 5 hours
- 36kWh at 2.3kW
- About 16 hours
- Full 60kWh at 7kW
- About 8.5 hours
- UK home maximum
- 7kW (single phase)
- Three-pin plug power
- 2.3kW
Sources
- ev-database.org, electric vehicle database Accessed 18 July 2026
- Zapmap, EV charging statistics Accessed 18 July 2026
- legislation.gov.uk, The Electric Vehicles (Smart Charge Points) Regulations 2021 Accessed 18 July 2026
- Octopus Energy, Intelligent Octopus Go Accessed 18 July 2026