Auto-Darkening Side Windows

[garygid]

I wonder if the technology used in auto-darkening glasses
could be used beneficially in the Aptera's side windows.

This kind of glass is "photochromic" (or photochromatic), and
they have a chemical reaction to ultraviolet (UV) radiation.
Silver chloride (or silver halide, etc.) is embedded in them.
When exposed to UV light, the molecules change shape and
absorb part of the visible light, otherwise, they are transparent.

I suspect the side windows could have this feature, since they
are usually just tempered glass. Perhaps the cost is too high.

The real question is, would this darkening in sunlight keep
a significant amount of the sun's energy from coming through
the window and heating the interior?

If the energy is substantially reduced, and not reflected,
do the windows become "too" hot for comfort?

The other issue is, would they be legal?

---------------
P.S. It seems that nobody makes "sheet" glass of this kind.

[evolutionmovement]

Check out SPD Smartglass - it's a laminated sandwich with either polycarbonate or glass that is opaque black when no voltage is applied and can be adjusted throughout the range to clear as the voltage is increased (total voltage use is far less than a radio). I don't know about cost, but I'd love to use this on one of my own vehicles.

[Brian]

The other issue is, would they be legal?

Not In Cali :cool:

[appyfan]

The other issue is, would they be legal?

Who cares? That technology sounds awesome. Worst comes to worst, if you ever do get pulled over just turn up the voltage and you have a nice clear view of the interior.:D