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Xiaomi SU7 breaks the 24-hour EV endurance benchmark
Xiaomi has pushed its SU7 electric sedan into the headlines by logging an impressive 24-hour endurance run of 4,264 kilometers. The distance bests the previous production-car mark held by the Xpeng P7, though the all-time single-day crown remains with the Mercedes AMG GT XX concept, which covered 5,479 kilometers in a day. The key distinction: Mercedes’ number comes from a concept prototype, while the SU7 is a production-ready sedan.
Why 24-hour range tests matter
Range is one of the most critical purchase metrics for electric vehicles (EVs). Beyond raw kilometers, endurance tests examine thermal management, charging consistency, and real-world energy efficiency under continuous stress. A strong 24-hour result signals not only long-range capability but also robust battery and cooling systems that sustain performance over long runs.
Fast charging and thermal management: the science behind the numbers
Reaching thousands of kilometers in a day isn’t just about a big battery — it requires ultra-fast charging infrastructure and sophisticated thermal control. The Mercedes GT XX reportedly supports an eye-watering 900 kW charging rate, far above today’s common 350 kW standard; that capacity could theoretically add roughly 400 km in just five minutes. Xiaomi’s SU7, meanwhile, can add up to 670 km of range in about 15 minutes according to the company—an impressive figure for a production EV.
Both vehicles rely on advanced thermal management to keep charging speeds high without degrading battery health. Consistent rapid charging over hours or days demands that battery packs stay cool and cells balance effectively, which is where optimized cooling loops and software controls become crucial.
Performance chops: Nürburgring time
Xiaomi has also been promoting the SU7’s sportier credentials. The SU7 Ultra performance variant recorded a Nürburgring lap of 7:04.957 — about 0.341 seconds quicker than the million-dollar Rimac NORA hypercar’s comparable run. That lap time underscores that Xiaomi is building EVs that combine both range efficiency and track-capable dynamics.
Production plans and market availability
Mercedes appears to be preparing the AMG GT XX for limited production after extensive testing — the brand claims endurance trials of up to 168 hours covering around 40,000 kilometers and expects production to start later this year. By contrast, Xiaomi’s SU7 is a production car already positioned to challenge established EVs in range, charging speed, and handling.
However, geopolitical and regulatory hurdles may limit where the SU7 will appear. Current indications suggest Xiaomi won’t enter the U.S. market immediately due to tariffs and regulatory barriers. Some Chinese EVs, though, could find routes into parts of North America—Canada, for example, has reportedly eased tariffs for a limited number of imports.
Highlights:
- 24-hour endurance: Xiaomi SU7 — 4,264 km
- All-time single-day lead: Mercedes AMG GT XX (concept) — 5,479 km
- Charging: claimed SU7 add ~670 km in 15 minutes; GT XX supports up to ~900 kW
- Nürburgring: SU7 Ultra — 7:04.957 lap
Whether you prioritize EV range, charging speed, or outright track performance, the SU7 shows that newer manufacturers are closing the gap with legacy brands — and that fast-charging tech plus thermal engineering are the true battlegrounds for next-generation electric cars.
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