Home › Models › BYD Seal U DM-i › Range & Charging
Understanding the plug-in hybrid capabilities of BYD’s latest family SUV is crucial for prospective buyers. The New BYD Seal U DM-i UK lineup features the Super Hybrid DM-i technology, designed to maximise efficiency and reduce emissions.
In this guide, we detail the official New BYD Seal U DM-i electric range, charge times, and overall New BYD Seal U DM-i fuel economy to help you decide which trim level — Boost, Comfort, or Design — best suits your driving habits.
New BYD Seal U DM-i battery size and Range
The vehicle uses BYD’s Blade Battery technology, featuring Lithium Iron Phosphate (LFP) chemistry running at a nominal voltage of 339.2 V. The New BYD Seal U DM-i battery size varies depending on the trim level you choose, which in turn directly affects the electric-only driving range and the total combined range when factoring in the 13.2-gallon (~60-litre) petrol tank.
The Boost and Design (AWD) trims are equipped with an 18.3 kWh battery. The Comfort trim is designed for maximum efficiency and uses a larger 26.6 kWh battery.
Electric and Combined Range Data
The official WLTP New BYD Seal U DM-i electric range figures show a clear difference based on battery size and drivetrain:
- Boost (18.3 kWh, FWD): Achieves a WLTP electric range of 50 miles combined, and up to 69 miles in city driving conditions. The total WLTP combined range (full battery plus a full tank of petrol) is 671 miles.
- Comfort (26.6 kWh, FWD): With the larger battery, the WLTP electric range increases to 78 miles combined, and 105 miles in the city. The total WLTP combined range extends to an impressive 700 miles.
- Design (18.3 kWh, AWD): Due to the more powerful all-wheel-drive setup and added weight, the WLTP electric range is 43 miles combined, and 61 miles in the city. The total WLTP combined range is 540 miles.
Electric consumption is rated at 3.7 mi/kWh for the Boost, 3.5 mi/kWh for the Comfort, and 3.1 mi/kWh for the Design trim. The vehicle’s aerodynamic drag coefficient of 0.34 helps to maintain this efficiency at higher speeds.
The kerb weight of the vehicle plays a role in these efficiency figures. The Boost trim has a kerb weight of 1,940 kg and a gross vehicle weight of 2,350 kg. The Comfort trim is slightly heavier with a kerb weight of 1,995 kg and a gross vehicle weight of 2,405 kg, accommodating the larger battery pack. The Design AWD is the heaviest in the lineup, with a kerb weight of 2,100 kg and a gross vehicle weight of 2,510 kg, which is largely due to the addition of the rear electric motor and the all-wheel-drive system.
New BYD Seal U DM-i fuel economy and Emissions
When the battery is depleted or when the petrol engine is required to assist the electric motors, the vehicle relies on its Euro 6e compliant petrol engine (taking 95 E10 fuel).
The official New BYD Seal U DM-i fuel economy figures are rated in two ways: a combined figure (when running as a standard hybrid with a depleted battery) and a weighted figure (which factors in regular home charging and electric-only running).
Efficiency and Emissions Table
| Trim | Fuel Combined | Fuel Weighted | CO2 Emissions (Combined) |
|---|---|---|---|
| Boost | 51.4 mpg | 403.9 mpg | 26 g/mile (~16 g/km, dealer) |
| Comfort | 50.5 mpg | 706.8 mpg | 15 g/mile |
| Design (AWD) | 41.0 mpg | 282.7 mpg | 37 g/mile |
(Note: Official CO2 emissions on the BYD specification sheet are provided in g/mile).
Charging Times and Capabilities
To get the best New BYD Seal U DM-i fuel economy, regular charging of the high-voltage battery is necessary. The vehicle uses a standard CCS2 charging port, allowing you to charge at home or at public charging stations.
When charging at a destination, the vehicle supports a maximum rate of 11 kW AC. Charging from 15% to 100% takes 120 minutes for the Boost and Design trims (18.3 kWh battery), and 192 minutes for the Comfort trim (26.6 kWh battery).
For faster top-ups on long journeys, the vehicle supports DC rapid charging at a maximum rate of 18 kW. Using a compatible DC public charger, the battery can be replenished from 30% to 80% in just 35 minutes for the Boost and Design trims, and 55 minutes for the Comfort trim.
FAQ
What is the New BYD Seal U DM-i electric range? The WLTP combined electric range is 50 miles for the Boost, 78 miles for the Comfort, and 43 miles for the Design.
What is the New BYD Seal U DM-i battery size? The Boost and Design trims feature an 18.3 kWh Blade LFP battery, while the Comfort trim uses a larger 26.6 kWh Blade LFP battery.
What is the New BYD Seal U DM-i fuel economy? The official WLTP weighted fuel economy is 403.9 mpg for the Boost, 706.8 mpg for the Comfort, and 282.7 mpg for the Design.
How long does it take to charge? Using an 11 kW AC charger, a 15–100% charge takes 120 minutes for the 18.3 kWh battery models and 192 minutes for the 26.6 kWh model. A DC 18 kW rapid charge (30–80%) takes 35 minutes and 55 minutes respectively.
What is the total range with a full battery and full tank? The total WLTP combined range is 671 miles for the Boost, 700 miles for the Comfort, and 540 miles for the Design.
Next steps: Confirm current range figures and book a test drive with your local BYD dealer.