Three-Phase EV Charging Cables

Three-phase cables deliver 11kW or 22kW, three times the speed of single-phase, provided the property has a three-phase supply feeding the wallbox. Most UK homes do not. Commercial sites, fleet depots and new-build estates often do.

Three-phase supply required. Three-phase electricity is rare in UK domestic settings, and most homes are single-phase. Check with a qualified electrician before ordering. A three-phase wallbox on a single-phase supply will not work at full speed and may not work at all.

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Three-Phase EV Charging Cables for UK EV owners

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Matching cable power to wallbox and supply

Three-phase EV charging cables (11kW or 22kW) unlock the maximum AC charging speeds available from UK home wallboxes. The catch is that three-phase domestic supply is rare in the UK (mostly newer-build homes, larger detached properties, or commercial-converted-to-residential). Most UK homes won't benefit. The minority that will, get 1.5-3× faster home charging.

Single-phase vs three-phase: the basics

UK domestic electricity is supplied either as single-phase (one live conductor at 230V, typical 100A fuse) or three-phase (three live conductors, each 230V, often 80A or 100A per phase). Single-phase is the default for nearly every UK home. Three-phase is the default for commercial and industrial buildings, and an option for newer or larger residential properties.

Three-phase delivers more total power: 3 × 230V × 32A = 22kW, vs single-phase's 1 × 230V × 32A = 7.4kW. For EV charging, the difference is direct: a 22kW three-phase wallbox charges three times faster than a 7kW single-phase wallbox, given a car that can accept it.

How to know if you have three-phase

Check your meter cabinet: a three-phase meter has three live cables coming in (typically labelled L1, L2, L3) plus a neutral. A single-phase meter has one live and a neutral. If you don't know, you almost certainly have single-phase, three-phase domestic in the UK is rare enough that most owners would know.

Confirm with a qualified electrician before ordering a three-phase wallbox or cable. The £200-400 for a survey is well-spent vs ordering kit that can't be used.

Cable variants in this collection

  • 11kW (16A 3-phase): middle option. Right answer for three-phase homes with EVs that cap at 11kW AC (BMW, VW Group, Mercedes, Tesla, Polestar, most of the market).
  • 22kW (32A 3-phase): full three-phase. Right answer for three-phase homes with EVs that accept 22kW AC (Renault Zoe, Audi e-tron with charger upgrade, some Mercedes EQ models, Porsche Taycan with the 22kW option).

Connector: Type 2 with all phases active

Type 2 (Mennekes): same connector as single-phase. The three phase pins are present in the connector body but unused on single-phase cables. Three-phase cables wire all three. The connector is identical from the outside; only the internal wiring differs.

EVs by AC max

Most modern EVs cap at 11kW AC even when the car is sold as "three-phase capable":

  • 11kW max: BMW (all current i-models), VW ID.3/4/5/7, Audi Q4/Q6 e-tron, Mercedes EQA/EQB/EQE, Tesla Model 3/Y, Polestar 2/3/4, Volvo EX30/XC40, Hyundai Ioniq 5/6, Kia EV6/9.
  • 22kW max: Renault Zoe (R135 onwards), Audi e-tron (with optional 22kW charger upgrade), some Mercedes EQS variants, Porsche Taycan (with the 22kW option), older Tesla Model S/X with dual-charger upgrade.

So if you have a Tesla Model 3 or BMW iX, an 11kW cable on three-phase supply = 11kW charging. A 22kW cable = still 11kW (car-side bottleneck). The cable rating is the upper limit; the car's onboard charger is the actual draw.

Charging speed maths

  • 7.4kW single-phase: ~25-30 miles/hour, 8 hours for full 60kWh battery.
  • 11kW three-phase: ~40-45 miles/hour, 5 hours for 60kWh.
  • 22kW three-phase: ~80-90 miles/hour, 2.5-3 hours for 60kWh.

Build and length

Three-phase cables are 30-50% heavier than single-phase equivalents at the same length. Pick the shortest length that works:

  • 5m or 7.5m for tight driveways.
  • 10m for typical layouts.
  • 15m+ only when genuinely needed; 15m three-phase 22kW is 8-10kg.

Three-phase wallboxes

Pair a three-phase cable with one of: MyEnergi Zappi 22kW (solar-integrated), Easee One 22kW (load-balancing), Wallbox Pulsar Plus 22kW, Project EV Pro Earth 22kW (value).

Upgrading to three-phase: when it makes sense

The DNO upgrade from single to three-phase costs £3,000-8,000 and takes 6-16 weeks. It rarely makes sense purely for EV charging: the 1-2 hour overnight saving on a typical commuter EV doesn't justify the capex. It makes more sense if you're also adding heat pumps, induction hobs, ASHPs and home batteries that all benefit from three-phase distribution.

Questions

Will my wallbox use the full speed of this cable?
Only if the wallbox is rated equal or higher. A 32A cable on a 16A wallbox throttles to 16A. Check your wallbox spec: most UK home wallboxes are 32A (7kW) or 32A three-phase (22kW).
Do I have a three-phase supply?
Most UK domestic supplies are single-phase. If you're not sure, check your distribution board or ask a qualified electrician. Single-phase = one live wire; three-phase = three live wires (typically only newer or larger UK builds).
Will a higher-power cable damage my car?
No. The car requests current from the cable based on what it can accept. A 32A cable on a car that asks for 16A simply delivers 16A.
How long does delivery take?
In-stock items ship same-day if ordered before 16:00 on a working day. Standard delivery is next-working-day across mainland UK. Northern Ireland, Channel Islands and remote Highlands take 2-3 working days. Free delivery on orders over £150.
What warranty do these come with?
Every product on our shelf carries a minimum two-year manufacturer warranty. We administer warranty claims directly: ship the replacement next-day and collect the original at no cost to you.

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