Frost is no longer the main enemy: Denza Z9GT pulls off fast charging even at −30 °C

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BYD has taken aim at one of the biggest fears for EV owners — winter charging. The company left a Denza Z9GT to soak for 24 hours at −30 °C, after which the electric car charged from 20 to 97% in just 12 minutes.

The test wasn't meant as a slick promo clip — it was a demonstration of Flash Charging 2.0. Under normal conditions, the system promises a charge from 10 to 70% in 5 minutes and from 10 to 97% in 9 minutes. In severe cold, the result is predictably worse, but it still looks unusually fast for the market: most EVs charge noticeably slower in such conditions.

BYD deliberately caps the upper limit at 97%, not 100%. Company chairman Wang Chuanfu has previously explained that this is needed to preserve regenerative braking after ultra-fast charging: a fully charged battery simply can't accept returning energy.

The Denza Z9GT is BYD's first production car with Flash Charging 2.0 and has already gone on sale in Europe. The shooting brake gets a 122 kWh LFP battery and a claimed 800 km WLTP range — close to the BMW iX3 with its 805 km.

The main question now isn't the car itself but the infrastructure. BYD plans to roll out around 3,000 fast-charging stations in Europe within a year. If the network actually materialises, the Z9GT will deliver a rare combination: long range, frost-proof charging and the option to travel without long stops.