BYD Sealion 7 Comfort RWD cost to own in the UK — the true 5-year total
The BYD Sealion 7 Comfort RWD starts at £46,990. Over 5 years, owning one (EV) costs about £49,584 in the UK as of July 1, 2026 — £826/month, £0.83/mile — including depreciation, charging (with the ~12% charging loss most calculators ignore), maintenance, insurance, financing and VED. That's £17,186 more than a comparable Kia Niro Hybrid over the same 5 years.
UK Electric Car Grant: up to £3,750 off the price of an eligible new EV (RRP ≤ £37,000, applied by the dealer). Shown for reference; not included in the totals above. Source: GOV.UK Electric Car Grant.
BYD Sealion 7 Comfort RWD · UK · 5-year estimate£49,584 total · £826/mo · £0.83/mi
Where the money goes
| Cost component | Electric · BYD Sealion 7 Comfort | Hybrid · Kia Niro Hybrid |
|---|---|---|
| Depreciation (estimated) | £29,134 (59%) | £15,135 (47%) |
| Charging / fuel | £6,897 (14%) | £6,511 (20%) |
| ↳ of which charging loss | 12% (~£828) | — |
| Maintenance | £1,500 (3%) | £1,998 (6%) |
| Insurance | £2,780 (6%) | £2,625 (8%) |
| Financing interest | £8,273 (17%) | £5,129 (16%) |
| Registration & fees | £1,000 (2%) | £1,000 (3%) |
| Total cost of ownership | £49,584 | £32,398 |
BYD Sealion 7 Comfort RWD specs & assumptions
- Starting price (RRP)
- £46,990manufacturer
- Powertrain
- Electric
- Efficiency
- 29.8 kWh/100miWLTP
- Range
- 300 miWLTP
- UK electricity
- 26.11p/kWhOfgem
- Annual miles (assumed)
- 12,000UK average
Cost to charge the BYD Sealion 7 Comfort RWD at home
The BYD Sealion 7 Comfort RWD runs about £8.84 per 100 mi at home — versus about £17.42 for a typical 40 mpg petrol car. Home charging only (the ~12% AC charging loss is included); public DC fast-charging is billed per session by each network — often 2–3× the home rate — and isn't in these figures.
- Per 100 mi at home
- £8.8429.8 kWh/100mi + 12% charging loss × £0.26/kWh
- A typical 40 mpg petrol car
- £17.42/100miat £1.53/litre — for comparison
Compare the BYD Sealion 7 Comfort RWD against any car, your mileage & your scenario