Seal U DM-i: battery size and electric range change by hybrid trim.
Which BYD Seal U DM-i plug-in hybrid has the largest battery and longest electric-only WLTP range?
BYD's March 2026 Spanish-market table lists the Comfort plug-in hybrid with 26.6 kWh and up to 125 km electric-only WLTP combined. Boost uses 18.3 kWh and 80 km; Design AWD also uses 18.3 kWh but is rated at 70 km. This is not the fully battery-electric SEAL U EV.
Applicable to: Spain, BYD March 2026 source: SEAL U DM-i Boost FWD, Comfort FWD and Design AWD, electric-only WLTP combined figures. No 2024 launch battery equivalence, market-wide warranty promise or combustion engine servicing data inferred.
Manufacturer-specified figures by configuration
These are manufacturer-referenced values for the named configurations only. Read the exact source for your engine, trim and market instead of carrying a measurement across model names or model years.
| Vehicle configuration | Published value | Context and limits | Manufacturer evidence |
|---|---|---|---|
| 2026 Spain SEAL U DM-i Boost · PHEV FWD | 18.3 kWh · 80 km EV WLTP | 1.5 L naturally aspirated gasoline hybrid · 160 kW combined system · original Spanish 2026 table | View original source ↗ |
| 2026 Spain SEAL U DM-i Comfort · PHEV FWD | 26.6 kWh · 125 km EV WLTP | 1.5 L naturally aspirated gasoline hybrid · 160 kW combined system · original Spanish 2026 table | View original source ↗ |
| 2026 Spain SEAL U DM-i Design · PHEV AWD | 18.3 kWh · 70 km EV WLTP | 1.5 L turbo gasoline engine plus dual electric motors · 238 kW combined system · original Spanish 2026 table | View original source ↗ |
Match the exact vehicle.
Check 1
The SEAL U DM-i is a plug-in hybrid with a gasoline engine; EV battery-only maintenance assumptions are unsafe. Consult exact manual for engine oil, coolant, filters and service intervals.
Check 2
Do not confuse EV-only WLTP range with total combined vehicle range; do not assign Comfort's 125 km to the 18.3 kWh Design AWD.
Check 3
Boost and Comfort FWD use a different gasoline-engine/hybrid configuration from Design AWD. Do not apply either model's parts or fluid data to the other without exact-year manufacturer service references.
Where the numbers came from
Source: BYD España's March 2026 DM-i technology release, official SEAL U DM-i technical table listing three trims, battery capacities, WLTP EV range and combined system output, plus manufacturer explanation of FWD/dual-motor AWD engines. No assumed global figures, service schedule, battery degradation warranty or separate automatic-transmission fluid claims.
Primary evidence (1 source)
- Manufacturer source 1byd.com ↗
3 exact configuration rows supported
This page is an original explanation of limited factual specifications. CarFactBook has not inferred an exact VIN, fitted replacement part, global-equivalent manual or unpublished service quantity.
Source count: 1. The original manufacturer's vehicle-specific manual and labels take priority if your exact car differs from these listed reference configurations.
Return to manufacturer research → · Browse the verified vehicle catalog →