AC Chargers: The UK Buyer’s Guide to Home EV Charging

AC vs DC charging — the comparison table

Every top-ranking AC-charger guide leads with this comparison because the difference drives the buying decision. Here’s the honest UK version:

Factor	AC charger (home / workplace)	DC charger (public rapid)
Power range	3kW → 22kW	50kW → 350kW
Conversion	Car’s onboard converter changes AC to DC	Charger pushes DC straight into the battery
Connector	Type 2 (Mode 3)	CCS (most cars) / CHAdeMO (older Leaf)
Typical install cost	£800–£1,200 home / £1,500–£3,000 workplace	£25,000–£120,000 per unit + DNO upgrade
Cost to use	2p–10p/kWh on a smart off-peak tariff	50p–85p/kWh on the public network
Charge time (40kWh EV)	5–6 hours on 7.4kW	30–40 mins to 80% on 50kW
Best for	Overnight at home, dwell-time workplace	Long journeys, top-up between stops

Source: powers and connector standards aligned with the UK Electric Vehicles (Smart Charge Points) Regulations 2021; tariff economics based on current Octopus Go / Intelligent Octopus / Flux published rates.

AC charger speeds in the UK — 3kW, 7.4kW single-phase, 22kW three-phase

Charger	Supply	Range added per hour	Typical use case
3 kW AC (slow)	Granny lead / 13A plug	~10–12 miles	Trickle-charging only — never the long-term answer.
7.4 kW AC (fast)	Single-phase 32A — most UK homes	~25–30 miles	The default UK home install. Full overnight charge for 95% of EVs.
11 kW AC	Three-phase — newer-build, rural, commercial	~35–45 miles	Three-phase homes, holiday lets, dual-EV households.
22 kW AC	Three-phase 32A	~70–90 miles	Workplace, fleet, hotel and leisure destination charging.

A standard UK 100A single-phase supply happily runs a 7.4kW charger — that’s the install we quote for the vast majority of Central Belt homes. Three-phase (415V) supplies are common in new-build estates, commercial premises and some rural Scotland properties. If you’re unsure, the meter cabinet tells the story: count the meter tails. We confirm phase at the free survey, and if you need a three-phase upgrade we co-ordinate with the DNO on your behalf.

Watch-out: many EVs cap AC charging below 22kW. Tesla Model 3, Hyundai Ioniq 5 and Polestar 2 accept 11kW; older Nissan Leafs cap at 6.6kW; Renault Zoe is the rare EV that accepts the full 22kW AC. We check your specific car at survey.

Mode 3, Type 2, tethered vs untethered — the terminology that matters

Mode 3 is the IEC 61851-1 standard for AC charging through a dedicated wall unit that talks to the car (as opposed to Mode 1 / Mode 2 trickle-charging through a household socket). Every modern UK home AC charger is Mode 3. Type 2 (Mennekes / IEC 62196-2) is the connector — a seven-pin socket that has been the EU and UK standard since 2014. Every current EV sold in the UK except the older Nissan Leaf has a Type 2 inlet.

Tethered chargers have a captive cable permanently attached — you grab the plug, plug it in, walk away. Quicker day-to-day, but the cable length (usually 5m or 7.5m) is fixed and a damaged cable means a service call. Untethered chargers are a socket only — you carry the cable in the boot and plug both ends in each time. More flexible (any length, replaceable, dual-Type 2 friendly), slightly more faff. We quote both — the right answer depends on your driveway layout and whether you might switch to a Type 1 vehicle later.

UK smart-charger law — the Electric Vehicles (Smart Charge Points) Regulations 2021

Since 30 June 2022 it has been illegal to sell or install a non-smart EV charger for home or workplace use in Great Britain. The Electric Vehicles (Smart Charge Points) Regulations 2021 mandate seven things — default off-peak charging windows, a randomised delay function (to spread grid load), data privacy controls, cyber-security against unauthorised remote access, demand-side response capability, a measurement system, and continued operation if the charger loses internet. The point is a national grid that survives 30 million EVs without rolling brown-outs, and a consumer who saves serious money by charging when wholesale electricity is cheap.

Every AC charger Ecoaim installs is regulation-compliant by default — Wallbox Pulsar Plus, Ohme Home Pro, Zappi v2.1, Hypervolt 3 Pro, Easee Charge Core. We don’t fit grey-import or pre-2022 stock. PAS 1899:2022 (accessibility for public chargepoints) is followed where the unit will be customer-facing.

Installation requirements — BS 7671 Section 722, RCDs and DNO notification

A safe, compliant UK AC charger install is governed by half a dozen documents at once. The lead standard is BS 7671 Section 722 (the 18th-edition Wiring Regs section dedicated to EV chargers), with BS EN 61851-1 for the equipment itself and PAS 1899:2022 where the charger is accessibility-graded. Every install needs:

• Dedicated 32A circuit back to the consumer unit, sized for 7.4kW (or three-phase 32A for 22kW), with cable rated for the design current and ambient.
• RCD Type A or Type B protection — most modern chargers have an integrated 6mA DC residual-current sensor (so a Type A RCD on the supply side is acceptable). Cheaper or older chargers without internal DC detection need an external Type B RCD.
• Earthing strategy — either a PEN-fault detection device (built into most current chargers), or an earth rod (TT system) where the supplier earth can’t be relied on. We assess this at survey.
• DNO notification to SP Energy Networks (central Scotland) or SSEN (north Scotland and the Highlands). Any charger above 3.68kW — so every 7.4kW and 22kW unit — must be notified. Above 16A per phase (so 22kW three-phase) needs prior approval, not just notification.
• EIC + Building Standards record — issued by an OZEV-style authorised installer (NICEIC, NAPIT or equivalent), with a Scottish Building Standards record up here in Scotland.

Ecoaim handles every piece of that paperwork. Survey on day one, DNO notification submitted that week, install + commission typically 3–4 hours on a single-phase 7.4kW job, all certificates and warranty registration emailed within 48 hours.

How much does an AC charger cost installed in the UK?

A typical 7.4kW smart AC charger fitted at a UK home lands between £800 and £1,200 inclusive. That covers the charger unit, wall-mounting, up to roughly 10 metres of cable run from the consumer unit, RCD protection, DNO notification, commissioning, and the EIC + warranty registration. Three-phase 22kW units run £1,400–£2,200 fitted because both the unit and the heavier cable cost more. Long cable runs over 15m, consumer-unit upgrades, earth-rod additions, or non-standard wall builds add to the total — we price every one of those at survey rather than hiding them in small print.

Compared with paying public-DC prices (a 40kWh EV public-charging once a week at 70p/kWh costs about £580 a year more than the same charge done at home on Octopus Go at 7p/kWh), most home AC chargers pay for themselves inside three years — and that’s before the EV Chargepoint Grant.

EV Chargepoint Grant + off-peak tariffs — the live UK savings stack

The OZEV EV Chargepoint Grant gives renters, leaseholders and flat owners with off-street parking 75% off the cost of an AC chargepoint and install, capped at £350 per socket. It runs until 31 March 2027. Homeowners in single-family houses no longer qualify since the original EVHS scheme closed in 2022, but landlord properties (residential and small-commercial portfolios) still claim, and the Home Energy Scotland route is open to Scottish homeowners for the wider energy package. Ecoaim handles every grant submission as part of the install — no DIY paperwork.

Stack the grant against a smart tariff and the payback gets aggressive:

• Octopus Go — 5 hours of 8.5p/kWh between 00:30 and 05:30. A 60kWh battery from empty refills for about £5.10.
• Intelligent Octopus Go — 6 hours of 7p/kWh, plus extra cheap slots the algorithm finds. Best for predictable overnight commuters.
• Octopus Flux — a peak-export tariff Ecoaim is an approved installer for. Charge your EV (and home battery) at 3am for ~16p/kWh, then sell stored power back at the 4–7pm peak for ~31p/kWh. Genuine bi-directional savings, even without a V2H-capable car.

Real-world maths for a 10,000-mile/year EV: home-charging on Octopus Go costs about £170 a year. The same miles on public DC cost about £940. That £770 annual delta is what makes a 7.4kW AC charger one of the cleanest paybacks in the UK home-energy market.

Choosing your AC charger — Wallbox, Ohme, Zappi, Hypervolt, Easee, Sigenergy

• Wallbox Pulsar Plus / Pulsar Pro — compact, premium build, MID-metered, OCPP for fleet/public. Strong choice for design-conscious installs.
• Ohme Home Pro — best-in-class Intelligent Octopus Go integration; the algorithm cuts your bill harder than tariff timers can.
• Zappi v2.1 — the solar-diversion king. Charges only from surplus PV in Eco+ mode — essential if you have or plan domestic solar panels.
• Hypervolt 3 Pro — British-designed, great app, customisable LED ring, strong solar follow.
• Easee Charge Core / Up — Norwegian engineering, daisy-chainable for dual-EV households, slim and tough.
• Sigenergy SigenStor with EV module — not a standalone charger, but if you’re also fitting Sigenergy battery storage the integrated DC-coupled module skips one conversion step and shaves a few percent off the energy round-trip.

Ecoaim’s AC charger install process — survey → DNO → install → commission → handover

1. Free survey + design (60 min onsite or remote). Phase check, consumer-unit review, cable-run measure, photo record. Fixed-price quote within 24 hours.
2. DNO notification submitted to SP Energy Networks or SSEN — typically a 5–10 working-day window for a 7.4kW notification, longer for a 22kW approval.
3. Install — 3–4 hours on a standard single-phase 7.4kW job, a full day for three-phase or long runs. Tidy cable management, weatherproofed penetrations, IP54 outdoor-rated unit.
4. Commission + handover — EIC issued, app paired to your phone, smart-tariff schedule programmed, two-year workmanship plus the manufacturer warranty registered.
5. Aftercare — Scottish in-house customer service team for any tariff tweaks, firmware updates or fault diagnosis. Same phone, same engineers, for the life of the install.

AC charger coverage — Scotland’s Central Belt

We install AC chargers daily across the Central Belt: Edinburgh, Glasgow, Falkirk, Stirling, Livingston (our home turf), Dunfermline, plus Lanarkshire, Fife and the Lothians. Outside the Central Belt by arrangement — a typical run to Perthshire or the Borders adds nothing to the unit price but does to the mobilisation cost.

FAQs — AC chargers, smart regs, grants and install

What is an AC charger for an electric car?

An AC (alternating current) charger is the home or workplace EV charger that delivers mains-style power through a Mode 3 Type 2 cable to your car’s onboard converter, which turns it into DC for the battery. In the UK, AC chargers run at 3kW, 7.4kW on single-phase or 22kW on three-phase supplies.

Is a home EV charger AC or DC?

Almost every home EV charger in the UK is AC. UK homes are supplied with alternating current, so domestic chargers feed AC into the car and the car’s internal converter changes it to DC for the battery. DC fast chargers are public-network units that bypass the car’s converter and cost tens of thousands to install.

What’s the difference between a 7kW and 22kW AC charger?

A 7.4kW charger needs a standard single-phase supply (most UK homes) and adds roughly 25–30 miles of range per hour. A 22kW charger needs a three-phase supply (rare in domestic, common in commercial) and adds 80–90 miles per hour — but only if your car supports 22kW AC. Many EVs cap at 7kW or 11kW on AC.

Do I need a smart AC charger by law in the UK?

Yes — under the Electric Vehicles (Smart Charge Points) Regulations 2021, every new home or workplace charger sold in Great Britain since 30 June 2022 must be smart-compliant: default off-peak charging, randomised delay, and DNO-grid-protection features. Ecoaim only fits regulation-compliant smart units.

How much does it cost to install an AC charger in the UK?

A typical 7.4kW AC charger installed in a UK home costs £800–£1,200 — covering the unit, mounting, up to ~10m of cable run to the consumer unit, RCD protection, DNO notification, and commissioning. Three-phase 22kW installs and long cable runs add cost; we’ll quote exactly after the survey.

Can I get a grant for an AC home EV charger?

Renters and flat owners with off-street parking can claim the OZEV EV Chargepoint Grant — 75% off purchase and install, capped at £350 per socket, available until 31 March 2027. Homeowners in single-family houses no longer qualify, but the Energy Saving Trust offers a separate Scottish grant route for some applicants.

Does my AC charger installation need DNO approval?

Yes. Every UK AC charger installation must be notified to your Distribution Network Operator (DNO) — SP Energy Networks or SSEN in our Scotland coverage area. Chargers above 3.68kW (so all 7.4kW and 22kW units) require notification, and over 16A per phase needs prior approval. We handle the paperwork.

How long does an AC charger installation take?

A standard single-phase 7.4kW install on a domestic property is a 3–4 hour job from arrival to commissioning. Three-phase 22kW installs, long cable runs (>15m), consumer-unit upgrades, or earth-rod additions can stretch this to a full day. We confirm the exact scope in the pre-install survey.

Why Scottish EV drivers pick Ecoaim for AC chargers

• Scotland HQ in Livingston EH54 (CHSG Ltd, SC705865) — a Central Belt installer, not a national lead-pass.
• MCS-certified renewables installer — the same hands that fit your solar and battery fit your AC charger, one warranty chain.
• EPVS-accredited — verified by the Energy Performance Validation Scheme for honest performance and savings claims (see our EPVS page).
• Approved Octopus Flux installer — we configure the charger to actually earn export credits, not just charge cheap.
• In-house Scottish customer service team — no overseas call centre, no chatbot.
• Ideal4Finance FRN-regulated funding (FRN 703401) — transparent finance options on every quote.
• MCS-certified and TrustMark-registered — credentials you can verify on a public register before you book the survey.