I Didn't Believe BYD's Flash Charging Claims So I Went To China To Verify - This Is World Changing

TL;DR

BYD's flash charging system genuinely delivers near-megawatt speeds, charging a Denza Z9 from 30% to 97% in under 8 minutes on an unprepared crashed car.

Key Points

• 1.BYD's flash charging claims were independently verified in a real-world test. The host charged a crashed, unwashed, unconditioned Denza Z9 GT from 30% to 96% in 7 minutes 52 seconds in a Beijing parking lot.
• 2.The system delivers over 1 megawatt of charging power. A single dispenser unit can simultaneously charge two vehicles at ~1,100 kW each, totaling 2,200 kW output from one cabinet.
• 3.The charger uses a battery-buffer system with the same Gen 2 blade cells as the cars. Two 200 kWh battery packs inside each cabinet run at 1,000V and achieve 10C discharge — versus the industry standard of 0.5–2C — enabling massive burst power from a 500 kVA grid connection.
• 4.BYD will democratize flash charging across its entire lineup. Every BYD model, from the cheapest Dolphin to the Yang Wang flagship, will adopt the Gen 2 blade LFP cell, enabling 10–70% in 5 minutes and 10–97% in 9 minutes regardless of price point.
• 5.A massive global rollout is planned for 2025–2026. From 2,500 dispensers currently operational in China, BYD targets 20,000 systems in China by year-end, plus 3,000 in Europe, 1,000 in Middle East/Africa, and thousands more worldwide.
• 6.Retrofit deployments and partnerships are the primary strategy to overcome infrastructure barriers. Diego, the head of BYD's charging rollout in Europe with a long Western charging industry background, explained they target existing sites with installed infrastructure to bypass permitting and transformer delays.
• 7.The cable handles up to 1,500 amps boost (1,000A continuous) via an overhead liquid-cooled design. The ceiling-mounted cable weighs almost nothing, uses BYD's own in-house developed connector, and the cooling system is a twin of the Denza Z9 GT's onboard cooling — no thermal throttling observed.
• 8.All hardware — from microcontrollers to power electronics to cooling — is developed entirely in-house by BYD. Diego noted no other company, including Tesla or Rivian, matches BYD's vertical integration depth spanning mechanical, thermal, electronics, software, and cloud systems.
• 9.The system includes V2G at 200 kW for dealership battery cycling. The car can discharge back into the BESS at 200 kW, recovering most energy minus conversion losses, allowing dealers to repeatedly demo fast charging without depleting the grid supply.
• 10.Cold-weather performance was demonstrated at -32.7°C, achieving 10–60% in 6 minutes and 10–80% in under 9 minutes. While preconditioning details were unconfirmed, BYD claims only 3 extra minutes at -30°C, and the host noted AC ripple current likely pre-heats the LFP cells rapidly.