JBee
Well-known member
- First Name
- JB
- Joined
- Nov 22, 2019
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- 18
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- 4,774
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- Location
- Australia
- Vehicles
- Cybertruck
- Occupation
- . Professional Hobbyist
Getting hot over time to the touch is not the same as the amount of heat energy transferred into the body that the HVAC has to get rid of. Over time the vehicle will become heat soaked, in that a black surface will eventually heat up the internal structure of the vehicle as well. The rate of this heat increase will be proportional to the emissivity of the outside.Stainless steel gets scalding hot in sunlight and its an excellent heat conductor
Black body matt is on the of the worst at 1.00 and SS is nearly half that when matt and ranges between 0.54-.63. When polished it an be as low as 0.075.
That is a big range, but black matt is by far the worst, at least 2x as bad, and as such will add twice as much heating load from sunlight from the panels of the vehicle. For cooling it is much the same, so it's only in mild climates and moderate sunlight where the effects are diminished, otherwise it is a loss.
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