randomwalk101

Thank you for the explanation gentlemen. I definitely learned something new today. 

As a average consumer, say you pay for a specific type/brand of tint but after you get the car back, how does one knows that tint on the car is what you asked for?  Thank you again. 

This is what I have

https://www.edtm.com/index.php/sp1080-digital-solar-power-meter

We are measuring the relative difference so absolute number doesn't make much of a difference 

I just got my 2023 Tesla front windshield and front windows tinted with Xpel XR Plus nano-ceramic (70% windshield and 35% front windows). 

Based an Xpel claims of 96% IR rejection

XPEL-PRIME-Spec-Sheet-USA-V2-1.pdf

I used a Solar Power Meter that measure the infrared/heat. I made some measurements and I was suprised of the results.  It appears that it's FAR from 96% IR rejection as claimed.  Please note this is full sun (no glass) vs glass AND tint.   I should have done the glass only but too late (tint already applied).  I'll try to find a non-tinted car to take the measurements in the future...

Car: 2023 Model Y
Tint type: Xpel XR plus nano-ceramic

Front windshield: 70%
Front windows: 35%
Rear windows: no tint (factory colored)
Rear hatch: no tint (factory colored)


Car parked @ full sun

Readings:
Meter pointed at the sun (no obstruction): 797
Front Windshield: 56
Front window: 179
Rear window: 94
Rear hatch glass (lifted up): 66

I forgot to do the roof glass. I'll retake all the measurements again for consistency when I do the roof. But looking at the factory color tint, it's appears that it's blocking out the heat better than the nano-ceramic? I'm surprised by this. I was told that the "dye" or darkness in the nano-ceramic tint doesn't make much of a difference.