Yes, in many areas you can — but it is a network-operator job you apply for in advance, not part of a normal charger installation. Your installer cannot do it alone, and most homes never need it: a single-phase Level 2 charger already covers typical overnight charging.
Key Takeaways
- A three-phase upgrade is network-operator work, applied for in advance — your installer cannot do it.
- The operator surveys your supply and quotes its work separately; there is no standard price.
- Most homes never need it: single-phase Level 2 covers typical overnight charging.
- Consider it for high-AC-power cars, a second charger, or alongside other major electrical work.
What the Upgrade Actually Changes
Your home is fed by an electricity supply owned by the network operator — the DNO in the UK, the utility in the US. Single-phase and three-phase describe how that supply is delivered, as our explainer on single-phase vs three-phase EV charging sets out. Upgrading means the operator changes its side of the connection: the service cable, the cut-out and the meter arrangement. Only the consumer unit and circuits on your side belong to your electrician.
| Single-phase home (typical) | After a three-phase upgrade | |
|---|---|---|
| Charging power available | The lower part of the Level 2 band — enough for overnight refills | The higher part of the band, for cars that can accept it |
| Who does the supply work | Nobody — the supply is already there | The network operator, after an application and survey |
| When it is arranged | Not applicable | Before the charger is installed, never on the day |
| Who quotes for it | Your installer quotes the charger work | The operator quotes the network work separately |
How the Application Normally Runs
- Ask before you book anything. Tell your installer you are considering three-phase. They will confirm what your current supply is and whether an application is needed at all.
- Expect a supply survey. The operator (or your installer on its behalf) checks the existing cut-out, the service cable and whether the local network has capacity — including awkward cases such as a looped supply shared with a neighbour.
- Get the network quote in writing. The operator prices its own work after the survey. There is no standard figure to budget from, and numbers quoted online for other houses do not transfer to yours.
- Wait for the supply work, then install. Only once the upgraded supply is live does your electrician adapt your consumer unit and fit the three-phase charger, with circuit sizing following the usual continuous-load rule — see what size breaker an EV charger needs.
When It Is Worth Considering — and When It Is Not
An upgrade earns its place in a short list of situations: a car that can accept high AC power and a driving pattern that genuinely needs fast home refills; a second charger planned for the same property; or other large electrical loads arriving at the same time. A renovation is also the cheapest moment to ask, because the operator is already involved.
For the common case — one car, parked overnight — it is hard to justify. Level 2 charging adds roughly 10 to 20 miles of range per hour across the band the U.S. DOT describes, and an overnight session at the single-phase end of that band refills far more than a typical day’s driving. Load management, which trims the charger’s draw when the house is busy, solves most capacity worries without touching the supply — your installer can advise, following the principles in our wallbox installation guide.
Chargers That Use a Three-Phase Supply
If the upgrade goes ahead, the hardware is the easy part. The EVDANCE EV-ACT3204PE 22 kW wallbox is a three-phase unit with a tethered Type 2 cable, RFID and app control, and CE marking. For a plug-in route, the EVDANCE ACS1605PE is an 11 kW three-phase portable charger with a CEE 5-pin plug. Both assume a genuine three-phase supply behind them. The full range is on the products page.
Frequently Asked Questions
Can my electrician upgrade my supply to three-phase?
No. The supply up to your meter belongs to the network operator, and only the operator can change it. Your electrician handles everything from the consumer unit onward, and can usually make the application with you.
How much does a three-phase upgrade cost?
There is no standard figure. The operator prices the work after surveying your supply and its network, and the cost lands with the homeowner. Get that written quote before committing to a three-phase charger.
Can I charge at 22 kW on a single-phase supply?
No. The top of the home AC range needs a three-phase supply, and the car must be able to accept it as well. Our single-phase vs three-phase explainer shows what each supply delivers in practice.
Related Reading
- Single-Phase vs Three-Phase EV Charging: 7kW, 11kW and 22kW Explained
- What Size Breaker Do I Need for an EV Charger?
- How Many Amps Does an EV Charger Need?
- Wallbox Home Charger Installation Guide 2026
