Home EV charger comparison UK 2026: 7kW vs 22kW, smart features, install

A home EV charger in the UK is most commonly a 7 kW unit, drawing 32 amps from a single-phase 230 V supply, because the overwhelming majority of UK domestic electricity connections are single phase. A 22 kW unit needs three-phase 400 V supply, which most homes do not have, so 22 kW installs require a DNO three-phase upgrade that can run £3,000 to £10,000 on top of the charger. Since 30 June 2022 every new home charger sold in the UK must comply with the Smart Charge Point Regulations 2021, meaning randomised delays, default off-peak charging windows, and cyber-security baselines.

The catch is that "smart" varies enormously between manufacturers.

The 7 kW vs 22 kW question

UK domestic electricity supply is overwhelmingly single phase: 230 V at typically 60 to 100 A. A 7 kW charger draws 32 A on that supply, which is around 30 km of EV range per hour of charging. For a household plugging in overnight, that comfortably refills a typical car between 22:00 and 07:00. There is no practical case for faster home charging if the vehicle is parked for nine hours. A 22 kW charger needs three-phase 400 V supply: three separate 230 V phases. Three-phase is common in commercial premises and on some rural properties or larger detached homes, but uncommon in the typical British semi or terrace. A three-phase upgrade involves a Distribution Network Operator (DNO) cable change from the street, a new meter, and reconfiguration of the consumer unit.

Costs run £3,000 to £10,000 and the DNO timeline can be months, not weeks.

The practical question is: does the household genuinely have a charging window of under five hours per day? For most UK EV owners, the answer is no, and 7 kW is the right answer.

The 22 kW case typically applies to multi-EV households, fleet operators using a domestic-style charger, or buyers with very long daily mileage who cannot accept overnight charging.

The OZEV smart regulations

The Electric Vehicles (Smart Charge Points) Regulations 2021 came into force on 30 June 2022 for the GB market, with a transition window for stock already in the supply chain. Every new home charger sold in the UK must:

• Default to off-peak charging windows (typically 23:30 to 05:30) unless the user actively overrides.
• Include randomised delay of up to 600 seconds at the start of a charge, to prevent grid demand spikes when many vehicles plug in simultaneously.
• Meet cyber-security baselines per the regulations, including secure default credentials and a defined incident reporting route.
• Continue charging through a loss of internet connection.
• Measure and record the electricity used for charging.
• Support demand-side response signals.

The Office for Zero Emission Vehicles (OZEV) and the Office for Product Safety and Standards enforce compliance. On the ground, every charger sold in the UK retail channel since mid-2022 carries this baseline, but the user experience around it varies sharply.

Charger models in the UK market

The major chargers sold to UK homeowners in 2026 break into three broad bands: solar-aware premium, smart-tariff-aware mainstream, and basic compliant. The table below summarises structural features. Verify current pricing on the manufacturer or approved installer site.

Tethered vs untethered

A tethered charger has a permanently attached cable. Plug into the car, walk away. Faster, neater, no cable to store. Limited to the connector type (Type 2 is universal in the UK, but the cable length is fixed).

An untethered charger has a socket only. The owner brings their own cable. More flexible (the same charger can serve any cable length the owner chooses) and arguably more theft-resistant when the car is not plugged in. Slightly slower to use day to day.

For single-EV households who park reliably in the same spot, tethered usually wins on convenience. For households expecting to sell the car within five years and uncertain about future connector standards, untethered preserves optionality.

Solar diversion and the Zappi case

Solar diversion is the ability to modulate charging power in real time to match the household's instantaneous surplus solar PV generation, so that the EV charges only from solar that would otherwise be exported to the grid. The Zappi v2.1 is the British-designed charger that put solar diversion on the UK map, and it remains the reference unit for solar-first households.

On the spreadsheet, solar diversion is worth roughly the difference between the household's import unit rate and the Smart Export Guarantee export tariff per kWh diverted. For a household importing at 28p and exporting at 5p, that is 23p per diverted kWh, which on a 4 kWp installation can add up to several hundred pounds per year if the EV is at home during the day. Most UK households are not, and the case for solar diversion is weaker for commuter EV owners.

OCPP and supplier integration

Open Charge Point Protocol (OCPP) is the open communication standard that lets a charger talk to a back-end management platform. UK retail supplier integrations (Octopus Intelligent, OVO Charge Anytime, E.ON Next Drive integrations) typically work via OCPP or a vendor-specific API.

The Ohme Home Pro has the strongest Octopus Intelligent track record because Ohme participated in the early Intelligent pilots and the integration is mature. Other chargers work, but the user experience can vary.

The DNO notification thread

Connecting an EV charger to the UK grid requires DNO notification or consent. The Energy Networks Association's Engineering Recommendation G98 covers connections up to 16 A per phase (so up to roughly 11 kW on single phase or 22 kW on three phase, depending on configuration), via "connect and notify" within 28 days of install. ER G99 covers larger or multi-charger installs where consent must be obtained before connection.

For a single 7 kW charger on a typical UK home, the route is G98 notification by the installer. For a 22 kW charger on a freshly-three-phased home, the route is more involved and may sit under G99 depending on the existing connection capacity. The catch is that DNOs can refuse or constrain a 22 kW connection if local network capacity is tight, and the homeowner cannot bypass that decision.

Install cost and timing in practice

A typical UK 7 kW install runs £900 to £1,400 fitted, depending on charger model, cable run length, consumer unit upgrades required, and whether earth rod or earthing matrix (PEN fault protection) is needed. The OZEV EV chargepoint grant for renters and flat-owners provides £350 toward install cost for eligible cases. Note that the OZEV grant for owner-occupiers in single-family homes was withdrawn in March 2022, so most homeowners pay the full install themselves.

A 22 kW install where three-phase is already present runs £1,400 to £2,500. A 22 kW install requiring DNO three-phase upgrade can run £4,000 to £12,000 all-in, with DNO timelines that have run to six months in capacity-constrained urban areas through 2024 and 2025.

Earthing and PEN fault protection

UK home EV chargers must include protection against an open PEN (combined Protective Earth and Neutral) fault, in line with BS 7671 wiring regulations and BS EN 61851 charger standards. Some chargers integrate this protection internally (Ohme Home Pro and Zappi v2.1, for example), removing the need for an external earth rod. Others require an installer-fitted earth electrode, which adds cost and requires garden access.

The earthing question matters because UK homes are typically supplied under PME (Protective Multiple Earthing), and an open PEN under EV charging conditions can present a shock hazard. The matrix of charger choice, supply type and earthing strategy is what makes the installer's site survey load-bearing rather than a formality.

Regional and devolved-nation notes

EV install economics differ across the four UK nations. Scotland through Transport Scotland and Energy Saving Trust has historically offered interest-free loans toward home charger purchase as part of the broader EV transition package, with terms varying by financial year. Scottish households in rural postcodes (IV, KW, HS, ZE) sometimes face longer DNO upgrade timelines due to network constraints.

Wales operates the same OZEV grant framework as England, with no Wales-specific charger grant. Northern Ireland has a separate Electric Vehicle Homecharge Scheme variant historically administered through DfI and equivalent of OZEV, with periodic eligibility updates.

In practice, the biggest single regional variable is DNO capacity. Densely connected urban networks (London, Manchester, Birmingham) often have shorter timelines for 7 kW G98 notifications. Rural single-phase networks can have constraints that make even a 7 kW charger require local reinforcement.

Choosing on actual usage

Three usage patterns dominate UK domestic EV charging in 2026: overnight commuter (one car, predictable parking, 100 to 200 km/day), multi-EV household (two or more cars sharing the same supply, requires dynamic load management between chargers), and solar-first daytime charger (PV on the roof, car often at home during the day). Each pattern points to different charger features. The overnight commuter rarely needs more than basic 7 kW with smart-tariff integration. The multi-EV household needs DLM. The solar-first household needs PV diversion.

Here is where it breaks for the household that picked the charger before working out the use case: a 22 kW Zappi on a single-phase supply is just a 7 kW charger with a pricier label. Specification before install matters more than brand prestige.

Frequently asked questions

Is a three-phase supply needed for a home EV charger?

Only for a 22 kW charger. A 7 kW charger runs on standard UK single-phase domestic supply, which is what most homes already have. Three-phase upgrades are expensive and only worth it where overnight charging really cannot meet daily demand.

Are home EV chargers still grant-funded for homeowners?

The OZEV grant for owner-occupied single-family homes closed on 31 March 2022. The grant continues for renters and flat-owners, at up to £350 per eligible chargepoint, and has additional routes for landlords.

Do all new home chargers have to be smart?

Yes since 30 June 2022. The Smart Charge Point Regulations 2021 require off-peak defaults, randomised delays, cyber-security baselines and demand-side response capability.

Can a tethered charger work with a different connector type?

Tethered chargers are fixed to a single connector type. UK home chargers are almost exclusively Type 2. If a future vehicle uses a different connector, the cable cannot be swapped on a tethered unit without rewiring.

What is dynamic load management?

DLM lets the charger throttle its output if other household loads are heavy, preventing the main fuse from tripping. It is essential when two EV chargers are installed on one supply or when a heat pump is on the same circuit.

How long does a home charger install take?

A standard 7 kW install is typically a half-day job once the installer has the charger and any consumer unit components on site. DNO notification is post-install for G98. End-to-end from order to commissioned charger is usually two to four weeks.

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