BYD Sealion 7 RWD Comfort range under different conditions and battery health levels.
Range dropped on your BYD Sealion 7 RWD Comfort?
A local EV specialist can test the battery and find out why. Tell us your postcode and we'll find you one.
Why real range is below the official figure
WLTP tests run in mild lab conditions at gentle speeds, so nearly every EV undershoots the sticker in real driving. For the BYD Sealion 7 RWD Comfort, a fair planning figure is about 255 miles, roughly 85% of the official 300. That works out at about 3.1 miles per kWh from the 82.5kWh usable battery.
- Motorway runs at 70mph cost the most: air resistance rises sharply with speed
- Winter takes 20 to 25% off: expect around 200 miles on a cold day with the heating on
- Gentle town driving can beat the realistic figure, sometimes even the WLTP one
How battery health changes the picture
Range fades slowly as the battery ages. At 90% battery health the realistic range drops to about 230 miles, which most owners barely notice day to day. At 70% health, the typical warranty threshold, it falls to about 180 miles.
If you are buying a used BYD Sealion 7 RWD Comfort, that spread is the reason to get the battery's actual state of health measured rather than guessing from the odometer. A specialist reads it directly from the car in under an hour.
Cables and kit for the BYD Sealion 7 RWD Comfort
The BYD Sealion 7 RWD Comfort supports V2L, so its battery can run 230V appliances on the drive, at a campsite or in a power cut. Our V2L cable for BYD cars gives you a mains socket from the charge port, on a lead up to 15m.
A spare Type 2 cable for public posts, or a granny charger for the boot, is in our EV charging cables and chargers range, built to order in the UK by Wottz.
Related on The EV Pros
BYD Sealion 7 RWD Comfort servicing near you
Every business on The EV Pros is checked for EV competence, so your BYD is worked on by people trained for high voltage systems.
Buying a used BYD Sealion 7 RWD Comfort?
Run its reg through our free car check first: every MOT, the mileage at each one, and what to expect from the battery at its age. The full history check adds outstanding finance, write-off and stolen records.