Solar energy arrives at the car as visible light, ultraviolet and infrared. Infrared is the part you feel rather than see, and on a vehicle with as much glass as a Tesla it makes a real difference to how the cabin feels. Kepler's nano-ceramic IR and IR+ films are built to work across that spectrum, reducing solar heat and glare and screening ultraviolet, which also helps limit sun damage to interior surfaces over time. Because the performance comes from ceramic layers rather than depth of color, you do not have to go dark to get a solar film, though darker shades add daytime privacy if that appeals. Ask the dealer to compare the exact film and shade for your Tesla.