EV charging runs at four broad speeds: a three-pin plug delivers 2.3kW, a home wallbox 7.4kW, public rapid chargers 25 to 99kW and ultra-rapids 100kW or more.[1][2] Divide battery size by power for the time: a 60kWh battery needs about 8 hours at 7.4kW, and adds most of its charge in well under an hour on a healthy rapid. UK cars use Type 2 connectors for AC and CCS for DC.
- Three-pin plug
- 2.3kWabout 8 miles per hour
- Home wallbox
- 7.4kWsingle-phase maximum
- Rapid (DC)
- 25-99kWZapmap classification
- Ultra-rapid (DC)
- 100kW+motorway and hub sites
- 60kWh at 7.4kW
- ~8 hrs0-100%, arithmetic
What is the difference between kW and kWh?
One letter, endless confusion, and it is the whole subject. Kilowatts (kW) measure flow: how fast energy moves. Kilowatt-hours (kWh) measure volume: how much energy has been delivered. The hose is kW, the bucket is kWh.
Battery capacity is quoted in kWh (a typical mid-size EV carries about 60kWh). Charger speed is quoted in kW. So the basic arithmetic of this entire topic is one division:
Hours to charge = battery size (kWh) ÷ charging power (kW)
Everything else in this guide is adjustments to that sum.
What are the charging speed categories?
Zapmap, which audits the UK public network, classifies devices as slow (3-6kW), fast (7-22kW), rapid (25-99kW) and ultra-rapid (100kW and above).[1] Two speeds outside the public categories matter at home: the 2.3kW three-pin plug[2] and the 7.4kW wallbox, which is the practical ceiling for UK homes because almost all domestic supplies are single-phase.
| Speed | Where you find it | 60kWh battery, 0-100% |
|---|---|---|
| 2.3kW | Any three-pin socket | ~26 hours |
| 7.4kW | Home wallbox, many car parks | ~8 hours |
| 22kW | Three-phase AC posts | ~2.7 hours* |
| 50kW | Older rapid chargers | ~1.2 hours* |
| 150kW | Ultra-rapid hubs | ~24 minutes* |
*Arithmetic before taper and losses; real DC sessions slow sharply near full, which is why operators quote 10-80% times. And a 22kW post only helps if your car’s onboard AC charger accepts more than 7.4kW; many accept 11kW at most, and some only 7.4kW.
Hours to charge a 60kWh battery, by power (arithmetic)
How many miles does an hour of charging add?
For daily life, miles per hour of charging is the more useful currency than kWh. At a real-world 3.5 miles per kWh, each power level converts like this (arithmetic, before losses):
| Power | Miles added per hour | An 8-hour overnight stop adds |
|---|---|---|
| 2.3kW (three-pin) | ~8 miles | ~64 miles |
| 7.4kW (wallbox) | ~26 miles | ~207 miles |
| 22kW (three-phase AC) | ~77 miles | full for most cars |
| 50kW (rapid) | ~175 miles | n/a, you would not stay |
The three-pin figure matches what charger firms quote (roughly 8 miles per hour[2]), which is a useful sanity check on the whole table. Notice the wallbox row: 26 miles per hour means even a five-hour overnight window covers far more than the average day’s driving, which is why speed anxiety fades soon after the hardware goes on the wall.
Which connectors do UK cars use?
Two, in practice. Type 2 is the AC connector: seven pins covering two signal lines, earth, neutral and three phases. It is the socket on your wallbox, the tethered cable’s plug and the inlet on the car. CCS (Combo 2) is the DC rapid connector, and it is literally the Type 2 face plus two large DC pins below, so one inlet on the car handles both.
UK EV connectors: Type 2 (AC) and CCS (DC rapid)
Two others exist mainly in the past tense. CHAdeMO, the Japanese DC standard, survives in the UK mostly on the older Nissan Leaf, and new installations increasingly omit it. Type 1 was the AC plug on early imports and is now rare. If you are buying a used EV old enough to carry either, check cable availability before you check the paint.
What limits the speed you actually get?
The slowest link in the chain, always. Four candidates:
- The car’s onboard AC charger. AC from a wallbox passes through the car’s own converter, and that converter’s rating (7.4kW for many models, 11kW for some) caps AC speed no matter what the post offers.
- Your supply. UK homes are almost all single-phase, which tops out at 7.4kW. Three-phase homes are rare enough that 22kW home charging is a curiosity here.
- The charging curve. DC charging bypasses the onboard charger and speaks directly to the battery, but the battery management system tapers the rate as charge rises. This is why DC times are quoted 10-80% and why sitting beyond 80% on a rapid is usually a poor use of your time and the charger.
- Conditions. Cold batteries charge slower until they warm; some cars precondition the battery en route to a rapid.
Do you need three-phase power at home?
No, and it is worth saying plainly because the upgrade gets sold hard. UK homes are almost all single-phase, which caps AC charging at 7.4kW. A three-phase upgrade involves your network operator, real civil works and four-figure costs, in exchange for a 22kW ceiling that many cars cannot use (their onboard AC chargers accept less) and that the overnight arithmetic rarely needs: the wallbox already fills a typical battery in a night. Three-phase makes sense for households running serious daytime loads, farms, or two EVs on brutal schedules. For everyone else, the money does more good invested in the right tariff.
Public AC is a different matter: 7-22kW posts at car parks, gyms and supermarkets are the quiet workhorses of destination charging, and your car simply draws what it can. Two hours at a 7kW supermarket post while you shop and swim is about 49 miles of range at 3.5 miles per kWh, free parking-time turned into fuel.
Does speed matter as much as it sounds?
At home, less than people expect. A wallbox at 7.4kW fills a 60kWh battery from empty in about 8 hours, but you almost never arrive empty. The six-hour cheap window on a tariff like Intelligent Octopus Go (23:30 to 05:30)[3] delivers about 44kWh, roughly 155 miles of range at 3.5 miles per kWh. For a typical commute, the car simply leaves full every morning, which is why the follow-up question (how long does charging take in practice?) has a calmer answer than the spec sheets suggest: see how long it takes to charge an electric car.
Speed matters enormously on long trips, where ultra-rapid hubs turn a stop into a coffee rather than a meal. You pay for the privilege: the public rapid average was 79p/kWh in May 2026,[4] roughly ten times a smart overnight home rate, and the sums behind that gap are in the cheapest way to charge an electric car at home.
What speed do you actually need on a long trip?
Enough to make the stop useful, which is a lower bar than the arms race suggests. The practical routine on a motorway run: arrive with a lowish battery, charge across the 10-80% band where the car accepts power fastest, and leave when the rate tapers rather than waiting for 100%. On a healthy ultra-rapid, that stop is measured in tens of minutes; on an older 50kW unit it is a proper break. Cars that precondition the battery on the way to a planned charger (many now do, via the sat nav) arrive warm and charge measurably faster, especially in winter.
What you are buying at these stops is time, and the price of time was 79p/kWh on average in May 2026.[4] The economical pattern for most drivers is obvious once stated: home kWh for daily life, rapid kWh for the handful of days a year the range genuinely runs out, and no guilt either way.
The bottom line
Learn the division (kWh ÷ kW), remember the four bands (2.3, 7.4, rapid, ultra-rapid) and the two connectors (Type 2 for AC, CCS for DC), and charging speed stops being a topic you need to think about. The car handles the negotiation, the tariff handles the bill, and the spec-sheet kilowatts matter about as much as your broadband’s theoretical maximum. If your parking situation rules out the wallbox entirely, start instead with charging an electric car without a driveway.