A video of a family inside a Xiaomi SU7, with all members wearing hats, garnered significant attention on 2/6. The direct midday sun prompted many to question the panoramic sunroof's sun protection capabilities and why the owner had not tinted the windows or installed a retractable shade.
The incident brought Xiaomi CEO Lei Jun into the discussion. When the SU7 model launched in 2024, Lei Jun extensively highlighted the car's comprehensive sun protection. He stated that the company used a multi-layer silver plating process on the sunroof and windshield, achieving 97.6%-99.9% isolation from ultraviolet and infrared radiation. The four side windows also featured UV-IR protection, with all 5.35 m2 of glass in the car designed for sun protection.
Practical tests subsequently revealed that the Xiaomi SU7's interior temperature, after 1.5 hours of sun exposure, was 12 degrees C lower than the Tesla Model 3, which uses an enamel coating and heat-absorbing ceramic glass. Despite these impressive technical specifications for UV and infrared protection, the video clearly demonstrates that direct, glaring sunlight on occupants remains uncomfortable.
In 2025, Xiaomi introduced the YU7 model, featuring upgrades in sun protection and thermal insulation, according to CarNewsChina. The YU7 Max version comes standard with a smart dimmable sunroof, capable of transitioning from transparent to shaded. This advanced sunroof achieves 99.99% ultraviolet and infrared isolation, along with 99.85% shading.
Xiaomi explains that while the dimmable sunroof does not achieve 100% shading like a physical sunshade, it offers unique advantages. Most existing sunshades primarily block visible light. However, the core of effective heat insulation and sun protection lies in blocking ultraviolet and infrared radiation, not solely visible light.
The vehicle featured in the viral video is a standard or Pro version of the SU7, equipped with a non-dimmable panoramic sunroof. This dimmable technology is exclusively available on the SU7 Max or YU7 versions.
The challenge of sun and heat protection for sunroofs has become a common concern in Vietnam in recent years, as more manufacturers integrate this feature. Given Vietnam's tropical climate, where summer outdoor temperatures can reach 40 degrees, this feature often leads to owners seeking additional shading solutions, incurring significant extra costs.
My Anh
