Mercedes-AMG's 710 kW charge claim has no public test yet

Mercedes-AMG says the electric GT SUV can take a charge at up to 710 kilowatts, and that 10 to 80 percent takes 12 minutes. Electrek and CarSauce both quote that claim. Neither one publishes a timed session of its own.

Electrek's Fred Lambert, writing on 17 October 2026, describes the SUV as the second model on AMG.EA and the first full-size SUV the division says it developed entirely in-house. The GT 63 and GT 55 use a 128 kilowatt-hour usable pack at 800 volts and three axial-flux motors. The GT 53 uses a 106 kilowatt-hour pack. Lambert puts peak output for the GT 63 at 1,153 horsepower, with continuous output of 711 horsepower on the GT 63 and GT 55 and 362 horsepower on the GT 53. CarSauce lists the GT 63 peak as 860 kilowatts. Converted, 1,153 horsepower is about 860 kilowatts, and 711 horsepower is about 530 kilowatts. The peak and the continuous figure are not interchangeable.

Lambert attributes the curve to Mercedes: up to 710 kilowatts on the large-pack models, 10 to 80 percent in 12 minutes, and as much as 454 kilometres of WLTP range added in 10 minutes. The GT 53 is rated at 600 kilowatts and 11 minutes for the same window. WLTP range for the GT 63 and GT 55 is given as 620 to 700 kilometres. CarSauce records the top of that band and a German order book for the GT 53 opening on 20 October 2026, at 113,050 euros including 19 percent VAT. The GT 55 and GT 63 follow in spring 2027, CarSauce reported. Lambert says the first US deliveries are set for summer 2027 and that US pricing had not been released.

Jörg Burzer, Mercedes-Benz Group's chief technology officer for development and procurement, framed the launch around the architecture rather than a measured charge. "With the new Mercedes-AMG GT SUV, we’re bringing the groundbreaking innovations of our AMG.EA architecture to a full-size SUV."

Lambert's sharpest point is about the plug a US driver can actually find. Mercedes lists NACS among five charging standards, he writes, so Supercharger access is not the hurdle. Many of the fastest public chargers going in now, including IONNA's, are rated around 400 kilowatts. A 710 kilowatt peak needs a stall and a voltage window that can supply it. He records a GT 63 SUV weight of 2,695 kilograms and tells readers to expect lower EPA numbers than the WLTP band, which is a European test cycle. No EPA figures are in either report.

Neither Electrek nor CarSauce reports a timed charge, so the 12-minute figure is Mercedes' own. When an independent session appears, the numbers worth keeping are the rate a real stall holds after the first minutes and the continuous output rather than the 1,153-horsepower peak. The 12-minute claim describes a charger most US public sites do not offer.