How to Choose a Home EV Charger (Wallbox)

Choosing a home EV charger comes down to a handful of decisions: whether the cable is built in or pluggable, whether the unit can talk to your smart tariff, and whether your electrical supply can support the output you want. Most UK homes get on perfectly well with a 7 kW single-phase wallbox, and the right unit for you depends on how you charge, which car you drive, and what features you want to control remotely. Browse our charging guides for more detail on specific scenarios before committing to a purchase.

Tethered or untethered: which should you choose?

A tethered wallbox has the charging cable permanently attached, which means you simply unclip it, plug into the car, and you are done. It is the most convenient option if you own one EV and it uses a Type 2 connector, which covers the vast majority of new cars sold in the UK. An untethered unit has a socket on the front, and you plug in a separate cable each time. This suits households with two different EVs, or drivers whose car uses a connector that does not match the most common tethered options. Untethered units also tend to be slightly more future-proof if you change car.

Smart vs dumb wallboxes: is smart worth it?

A smart wallbox connects to your home Wi-Fi and communicates with an app. This lets you schedule charging for off-peak hours, which matters if you are on a time-of-use tariff where overnight rates are notably lower than daytime ones. Smart units can also pause charging if your home demand spikes, reducing the risk of tripping a fuse. Some integrate with solar inverters, drawing from your panels first before pulling from the grid. A dumb wallbox does the job reliably but gives you no scheduling control: it charges whenever the car is plugged in. For most drivers who want to take advantage of a smart EV tariff, the connected option is worth having.

Single-phase or three-phase: what UK homes actually need

UK domestic electricity is almost universally single-phase, which supports wallboxes up to around 7 kW. Three-phase supply, which can power wallboxes up to 22 kW on AC, is rare in residential properties and more common in commercial buildings or some newer developments. Even if you found a three-phase supply, the benefit only materialises if your car's onboard charger accepts more than 7 kW AC. Most current EVs cap at 7 kW or 11 kW on AC regardless of the supply. A 7 kW single-phase wallbox is the right choice for the overwhelming majority of UK homeowners.

Why OZEV-approved installers matter

OZEV, the Office for Zero Emission Vehicles, maintains a register of approved wallbox installers. Using an approved installer is a condition of any government grant scheme that may apply to your installation, and it also provides assurance that the work meets the relevant electrical standards. An OZEV-approved installer will assess your consumer unit, identify whether any upgrades are needed, and handle the electrical sign-off required after installation. If you use an unapproved installer, you may not only lose grant eligibility but also face complications with your home insurer or when selling the property.

What to ask the installer before they start

A good pre-installation conversation covers several points. Ask whether your consumer unit can handle the additional load without an upgrade. Ask where the cable will run from the unit to your consumer unit and whether it needs to go through walls or across the garage ceiling. Ask whether a DNO (Distribution Network Operator) application is needed: this is sometimes required for higher-output units and adds time to the process, typically several weeks. Ask about any earthing requirements particular to your property. And ask what ongoing support looks like if the unit develops a fault, particularly if it is a smart unit that relies on a manufacturer's app and server infrastructure.

Solar-ready features and app control: future-proofing your install

If you have solar panels or are considering them, some wallboxes offer solar optimisation modes that detect surplus generation and prioritise charging from it. This can reduce the amount of grid electricity you use and lower running costs over time. App control, separately, lets you monitor charging sessions, check energy usage history, and set schedules from your phone. Some apps also integrate with smart home platforms. These features are not essential, but they add genuine value for drivers who want visibility over their charging costs and for anyone planning to maximise the benefit of renewable generation at home.

Frequently asked questions

Do I need a smart wallbox to use a cheaper overnight EV tariff?

You need a wallbox that can schedule charging to the overnight window, which requires smart capability. Some smart tariffs can also be controlled via the car's own app rather than the wallbox, so check whether your car supports tariff scheduling directly before assuming you need it in the unit itself.

Can I install a wallbox myself to save money?

No. Wallbox installation must be carried out by a qualified electrician, and to access any government grant scheme it must be an OZEV-approved installer. The work involves connecting to your consumer unit, which is notifiable electrical work in the UK and must be certified by a competent person under Part P of the building regulations.

How long does a home wallbox installation typically take on the day?

Most straightforward installations take around two to three hours once the installer arrives. If additional work is needed, such as a consumer unit upgrade or running cable over a longer distance, the job may take longer or require a follow-up visit. Your installer should give you a realistic timeframe after the survey.

Will a wallbox work with any EV?

Most wallboxes use a Type 2 socket or tethered Type 2 cable, which is compatible with virtually all EVs sold in the UK and Europe. A small number of older models or those originally designed for other markets may use a different connector. Always check your car's charging port type before purchasing a tethered unit.

Is there a government grant available for home wallbox installation?

Grant schemes for home EV charger installation have changed over time. At the time of writing, grants are available to renters, flat owners, and some other groups rather than all homeowners. Check the current OZEV grant guidance directly, as eligibility criteria and availability change, and your approved installer can confirm what applies to your situation.

What happens if I move house after installing a wallbox?

The wallbox is a fixed fitting and would typically stay with the property, where it can be a selling point for any buyer with an EV. You can usually arrange to have it removed and reinstalled at your new property, though this incurs additional installer costs. Check with your wallbox supplier about transferring any warranty or support contract.

Once you have chosen your wallbox and found an OZEV-approved installer, the next step is thinking about the cable between your wallbox and your car. Browse our EV charging cables by car to find the right lead, and visit our guides section for practical advice on everything from understanding your tariff to charging away from home.