EV running costs are significantly lower than petrol or diesel — but only if you charge smartly. The difference between home and public rapid charging is dramatic.
The Cost Gap: Home vs Public Charging
| Charging type | Typical rate (2026) | Cost per mile (typical EV at 4 miles/kWh) |
|---|---|---|
| Home (standard rate) | 24.5p/kWh | 6.1p/mile |
| Home (off-peak Intelligent Octopus) | 7p/kWh | 1.75p/mile |
| Home (solar-powered, daytime) | ~0–3p/kWh | 0–0.75p/mile |
| Destination charger (slow, 7kW) | 20–35p/kWh | 5–8.75p/mile |
| Public AC charger (22kW) | 40–60p/kWh | 10–15p/mile |
| Public rapid charger (50kW) | 65–80p/kWh | 16–20p/mile |
| Public ultra-rapid (150–300kW) | 75–95p/kWh | 19–24p/mile |
| Petrol car equivalent | — | 18–22p/mile (55mpg at 135p/litre) |
Key insight: Home charging on an off-peak tariff at 7p/kWh costs 1.75p/mile — less than 10% of petrol costs. Public ultra-rapid charging at 85p/kWh costs 21p/mile — comparable to petrol.
Home Charger Installation
| Charger type | Power | Typical charge time (60kWh) | Install cost |
|---|---|---|---|
| 3-pin plug (EVSE cable) | 2.3–3kW | 20–25 hours | No install cost |
| Home wallbox (7kW) | 7kW | 8–10 hours | £600–£1,200 |
| Home wallbox (22kW) | 22kW | 3–4 hours | £1,200–£2,000 |
Most UK homes are limited to 7kW single-phase charging. Three-phase supplies (for 22kW) require a three-phase meter and electrical upgrade, which is expensive and rarely worthwhile for home use.
Smart chargers are required by law for new home charger installations since 2022. Smart chargers can:
- Schedule charging automatically during off-peak rate windows
- Respond to grid demand signals (V2G-ready models)
- Track energy use and costs
- Integrate with solar PV systems
Off-Peak Tariffs — The Biggest Saving
The off-peak tariff opportunity is the single largest financial benefit available to EV owners.
| Tariff | Off-peak rate | Hours | Annual saving vs standard rate (10,000 miles) |
|---|---|---|---|
| Octopus Intelligent Go | 7p/kWh | 11pm–5am + scheduled smart charge windows | £560/year |
| Octopus Go | 7.5p/kWh | 12am–5am | £535/year |
| OVO Drive Anytime | 10p/kWh | Off-peak hours | £464/year |
| E.ON Next Drive | 8.5p/kWh | Variable | £510/year |
Saving calculated vs standard rate 24.5p/kWh for 2,500 kWh annual EV use.
Octopus Intelligent Go uses telematics (via your car’s API) to know when your car is plugged in and schedules charging automatically in the cheapest windows — sometimes extending the cheap-rate window beyond the standard hours based on grid conditions.
Public Charging Network Comparison
For long-distance travel and households without home charging, public networks are essential:
| Network | Typical rate | Notes |
|---|---|---|
| Shell Recharge | 60–79p/kWh | Wide coverage; contactless pay |
| Gridserve Electric Highway | 65p/kWh (subscription) | Motorway services; good reliability |
| BP Pulse | 65–80p/kWh | Subscription reduces rate |
| Pod Point | 35–65p/kWh | Often at Tesco / ASDA |
| Osprey | 65p/kWh | UK motorways |
| Osprey (RFID subscription) | 50p/kWh | Reduced for subscribers |
| Bonnet (aggregator) | Varies | Access multiple networks, often cheaper |
Bonnet and Electroverse are apps that aggregate multiple networks under one payment system, often with lower per-kWh rates than paying directly at the charger. Worth installing for any regular public charger user.
Solar + EV: The Best Combination
Pairing solar panels with home EV charging is one of the strongest financial combinations in 2026:
- Solar generates electricity free during daylight hours
- Smart chargers with solar integration (iBoost, myenergi Zappi) prioritise EV charging from solar before exporting to the grid
- During summer, a 4kW solar system can fully charge many smaller EVs from solar output alone
The myenergi Zappi charger (~£700–£1,000 installed) actively diverts surplus solar generation to your EV, reducing grid import to near-zero for summer daytime charging. Combined with an off-peak tariff for overnight top-ups, total charging costs can fall to under 3p/mile.
Annual Cost Summary: 10,000 Miles
| Strategy | Annual cost (10,000 miles) |
|---|---|
| All public rapid charging (75p/kWh) | ~£1,875 |
| Home standard rate only | ~£625 |
| Home off-peak (7p/kWh) | ~£178 |
| Home solar (summer) + off-peak (winter) | ~£80–£150 |
| Equivalent petrol car (55mpg) | ~£2,455 |
Home Charger Installation: Costs and Grants
Before comparing running costs, you need a home charger. A 7kW wall charger is the standard choice for most EV owners — it charges most cars from 20% to 80% in 3–6 hours overnight.
| Charger type | Charge rate | Installed cost | Notes |
|---|---|---|---|
| 3-pin plug (granny cable) | 2.4kW | £0 (included with car) | Slow; not suitable as permanent solution |
| 7kW wall charger (untethered) | 7kW | £750–£1,200 | Use your own cable |
| 7kW wall charger (tethered) | 7kW | £800–£1,300 | Cable attached; more convenient |
| 22kW three-phase charger | 22kW | £1,200–£2,000+ | Requires three-phase supply; not common in homes |
OZEV/LEVI grant: The government’s Electric Vehicle Homecharge Scheme (EVHS) provides a £350 grant toward home charger installation for those who do not have off-street parking (flat/rental properties where charger is installed in a communal area). For standard homes with driveways, OZEV grants are available to landlords and those in certain situations. Check gov.uk for the current grant availability — the scheme has changed several times in recent years.
Installation requirements: Your home must have a single-phase electricity supply (standard for most UK homes) and a suitable external wall or garage near your parking space. Some older properties may need an electrical upgrade (consumer unit replacement) before a charger can be installed safely — budget £300–£600 for this if needed.
Related Guides
- EV Home Charging — Costs and Grants — installation grants and charger guide
- Green Technology hub — full financial guide to green home technology
- Solar Panels UK — Costs, Savings and Grants — solar + EV combination
- Is Solar Worth It UK? — ROI analysis