Solar energy reaching your car arrives as visible light, ultraviolet and infrared, and the infrared portion is the part you feel as heat without ever seeing it. Kepler's IR and IR+ nano-ceramic films are designed to work on solar heat at the glass, which is why they can perform without relying on a very dark shade. That is also why visible light transmission, the measure of how much light passes through, should be read separately from heat performance when you are comparing options. In practice the benefit shows up as a cabin that is more comfortable to sit in after the car has been parked in the sun, and less glare on bright drives. Because Tesla glazing differs by model and year, ask your Kepler dealer to confirm which film suits your car and to show you the technical data for the exact film and shade you are considering.
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