BYD Seal Home Charging UK: Cost per Charge, Time & Best Chargers
Vehicle guide
The 82.5 kWh Seal fills in about 11 hours on a 7 kW wallbox and costs about £6 on an off-peak tariff. Blade battery means 100% every night; the deep-sleep quirk means the car, not the charger, should hold the schedule.
Battery
82.5 kWh
20–80% at home
~7h 15m
AC limit
11 kW
20–80% at 7.6p
£3.76
Range
~295 mi
Charging time estimates
Approximate AC charging times
| Charge window | 3-pin (~2.3kW) | 7kW | 11kW max |
|---|---|---|---|
| 20–80% | 23h 15m | 7h 40m | 4h 50m |
| 0–100% | 38h 45m | 12h 45m | 8h 5m |
Assumes 8% charging losses and rounded 5-minute estimates. 3-pin assumes about 2.3kW; 7kW uses up to 7kW; three-phase only appears when the vehicle can accept more than 7.4kW AC.
Vehicle-specific tariff cost
BYD Seal Design (RWD) charging cost at 10,000 miles.
EV electricity only, using 3.6 miles per kWh and assuming every charging kWh reaches the listed lower rate. Household electricity and the postcode-dependent standing charge sit outside these figures.
Compare the full household bill, eligibility and achievable off-peak share in the EV tariff decision guide.
Charger picks
BYD Seal Design (RWD): 3 chargers we’d pick
Picked for the trade-offs that matter most when you’re buying for BYD Seal Design (RWD) specifically.
Best fit for BYD Seal Design (RWD)
Tesla Tesla Wall Connector (Gen 3)The Seal sleeps through charger-initiated starts, so the car's own schedule does the work and the charger is a socket; the 7.3 m tethered cable reaches a rear-right socket parked nose-in.
- Price
- £475
- Power
- 7.4kW / 22kW
Compact, OZEV-approved and the cheapest fitted option at £480 for renters and flats.
- Price
- £480
- Power
- 7.4kW
Daytime solar diversion happens while the car is awake, which sidesteps the overnight sleep problem; an 82.5 kWh pack can absorb a lot of surplus.
- Price
- £684
- Power
- 7kW / 22kW
The hardware
The Seal's Type 2 inlet is on the rear right wing, so reversing in puts the socket by the house; nose-in parking wants a 7.5 m cable. The on-board charger is 11 kW on both versions, which gives the full 7.4 kW on a UK single-phase supply and 11 kW on three-phase. BYD includes a 3-pin lead; a Type 2 cable has not always been in the box, so check with the dealer.
DC peaks at 150 kW on the 800 V platform, which is quick for its class but, as ever, irrelevant at home.
Variants (2026)
| Variant | Battery (usable) | Max AC | Max DC | WLTP range |
|---|---|---|---|---|
| Design (RWD, 230 kW) | 82.5 kWh | 11 kW | 150 kW | 354 miles |
| Excellence (AWD, 390 kW) | 82.5 kWh | 11 kW | 150 kW | 323 miles |
Usable capacity of the 84 kWh gross pack. The 2026 model year arrived in February 2026 at £45,730 and £48,730. Real-world range is about 295 and 275 miles.
How long it takes to charge the Seal
The figures below are for the rear-wheel-drive Design, the version most people buy, with its 82.5kWh usable battery.
20% to 80%, the everyday window
| Supply | Charge time (20–80%) | Range added |
|---|---|---|
| 3-pin socket (~2.3 kW) | ~22 hours | ~178 miles |
| 7 kW wallbox | ~6½ hours | ~178 miles |
| 11 kW three-phase | ~4.5 hours | ~178 miles |
A big battery, so a full charge on single-phase is a long night; most days you are replacing 30–50 miles in two hours. The 11 kW figure needs a three-phase supply.
0% to 100%
| Supply | Charge time (0–100%) | Notes |
|---|---|---|
| 3-pin socket (~2.3 kW) | ~36 hours | Emergency use only |
| 7 kW wallbox (single-phase) | ~11 hours | The standard overnight charge |
| 11 kW wallbox (three-phase) | ~7½ hours | Only if the house has a three-phase supply |
Costs
The tariff does most of the work. The Seal returns about 3.6 mi/kWh in real-world UK driving.
Cost per full charge (82.5kWh)
| Tariff | Rate | 0–100% | 20–80% |
|---|---|---|---|
| EDF GoElectric | 6.66p/kWh | £5.49 | £3.30 |
| Octopus Intelligent Go | 7.6p/kWh | £6.27 | £3.76 |
| Octopus Go | 9.5p/kWh | £7.84 | £4.70 |
| British Gas EV Power | 9.5p/kWh | £7.84 | £4.70 |
| Standard variable (Ofgem cap) | 26.32p/kWh | £21.71 | £13.03 |
| Public rapid charger | 79p/kWh | £65.17 | £39.10 |
Annual charging cost at 10,000 miles
| Tariff | Cost per mile | Annual cost |
|---|---|---|
| Octopus Intelligent Go | 2.1p/mile | £211 |
| Octopus Go | 2.6p/mile | £264 |
| Standard variable | 7.3p/mile | £731 |
| Public rapid only | 21.9p/mile | £2,194 |
| Petrol equivalent | ~19p | ~£1,900 |
Petrol assumes 40 mpg at £1.45 a litre. The electricity figures are charging only: no standing charge, and no allowance for the 5–10% lost between the wall and the battery.
The gap between the standard rate and a good EV tariff is several hundred pounds a year on typical mileage, and it costs nothing to close. The interactive savings calculator runs the numbers for your mileage; the UK EV Charging Cost Index compares every tariff per mile.
Blade battery: charge to 100%
The Seal uses BYD's LFP Blade battery. Charge to 100% routinely: LFP does not suffer the way NMC does from sitting at full, and BYD wants a full charge at least weekly so the battery management system can calibrate. There is no 80% rule to remember.
The BYD app's 2.0 update in September 2025 added a scheduled-departure mode and the ability to adjust AC charging current (MyBYD), but there is still no charge-limit slider; with LFP that matters less than it sounds.
Smart tariffs and the Seal
Intelligent Octopus Go has no integration with the car, so the scheduling has to come from the charger. That rules in the Ohme Home Pro, Ohme ePod, myenergi zappi, Hypervolt Home 3 Pro, Indra, Andersen and Octopus's own Octopus Charge, and rules out a basic wallbox if you want the 7.6p rate with no manual timers. BYD is not on OVO's list either. The BYD-specific problem is the same one Dolphin and Atto 3 owners describe: the car goes into a deep sleep after it has been plugged in for a while, and then ignores a charger-initiated start. A zappi or Ohme on Intelligent Go may run the first session and then fail the next (myenergi forum, Seal thread). The dependable pattern is the car's own schedule on a fixed-window tariff, Octopus Go or EDF GoElectric, so the car wakes itself at the right time.
Choosing a charger
Every home charger on this site works with the Seal: Type 2 is universal for UK AC charging. With the car holding the schedule, the charger is a socket; pick on cable, build and price.
- Tesla Wall Connector at £475: a 7.3 m tethered cable that reaches a rear-right socket parked nose-in, four-year warranty, and no pretence of smart features the car would ignore.
- Easee One at £480: compact, OZEV-approved, RCD inside; the cheapest fitted option for renters and flats.
- myenergi zappi at £684: for solar homes. Daytime surplus diversion happens while the car is awake, which neatly sidesteps the overnight sleep problem, and the 82.5 kWh pack can absorb a lot of it.
Full head-to-heads are on the charger comparison page, and the smart-tariff chargers guide covers which units talk to which supplier.
Common questions
Can I charge a Seal from a 3-pin plug?
Yes, with the lead BYD supplies, at about 2.3 kW. A full 82.5 kWh charge takes a day and a half; it is for emergencies. 3-pin guide.
Does the Seal work with Intelligent Octopus Go?
Not through the car, and unreliably through a smart charger because of the sleep behaviour. A fixed-window tariff with the car's own schedule is the honest recommendation.
Should I charge the Seal to 100%?
Yes, it is an LFP battery. BYD recommends regular full charges.
Does the Seal have Vehicle-to-Load or V2G?
V2L at 3.3 kW through an adapter. No vehicle-to-grid yet, although BYD and Octopus have discussed a trial.
Getting set up
- Switch to an EV tariff before anything else; the saving starts the day it goes live.
- Choose a charger, or compare them all.
- Get installation quotes: up to three local installers, no obligation.
- Read the installation guide so the day itself holds no surprises.
FAQ
Frequently asked questions.
Your next useful step: compare the recommended home chargers.