EVglass Double-Pane Panoroof add-on now available for cold climates

[azerik]

I don't think I would use this is a hot climate.


The glass roof is probably a source of 10-30% of the passive cooling of the cabin because the hot air rises to the top of the cabin and warms the most thermally conductive object at the top, which is the glass roof. The heat then is conductively transferred out of the interior. In a hot climate, the interior is going to be significantly warmer than the outside. This is especially true while moving, which sets up a forced convection thermal regime.

If you put a cloth cover like the folding sunshade between you and the glass roof, it makes the cabin feel cooler because it stops IR radiation from the glass being directed down onto you while still allowing the hot air to accumulate at the ceiling and to warm the glass, and that heat is then conducted out.

But putting a layer of thermally-insulating anything at the top of the ceiling of the Mustang will trap that thermal energy in the cabin. It won't be able to get to the glass, which is the only conduit for heat out of the top of the vehicle.

Looks like we both were coming up with this about the same time. Mine arrived and will be up for sale. I was playing around with a smaller piece of poly I have and that type of foam adhesive, it was holding the warmth more due to the lack of convection cooling was able to clear. I can’t say it’d heat up the car more (as I was only working with a 1 sq ft piece and it was twice as thick as the EVinsulate poly) but it doesn’t lose the heat as fast as air on the glass. I only tested for about a 30 min, but if I can’t drop the inside temp of the glass in 10 min it’s going to be uncomfortable. Seems I jumped too quick. Ah well.

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[21st Century Pony]

With the provided eight headboard mounting clips, I wonder whether the (non-tape) use of the EVInsulate panel could be effective as a seasonal addition.

 

[Thunderbuck]

Ok, I hate to be a skeptic here, but could someone please explain to me, in bunny rabbit English, exactly how you would feel a draft through a solid piece of glass?
Im sorry, but this just feels scammy, like the outfit on the home page trying to sell rear view mirrors for the Mustang Mach-E that enhance your rear view - apparently, they never got the memo about BLIS. ?‍?

As it happens, I have relevent experience here. I drove a '21 Select for over a year and a half in Whitehorse, Yukon, a place where we can get into the -40s Celsius in the winter. In that Select, with the steel roof, the cabin was pretty reasonable even in the coldest weather.

A few weeks ago I traded up for a Premium with the glass roof. I didn't notice it until I drove at highway speeds, but there is a TON of heat transmitted through that glass roof and you feel it very quickly. It's a huge difference.

 

[SpaceEVDriver]

With the provided eight headboard mounting clips, I wonder whether the (non-tape) use of the EVInsulate panel could be effective as a seasonal addition.

I wouldn't. You don't want a large piece of polycarbonate flying around the cabin in an accident... I don't think I would even trust the tape to hold it, but I don't know the specs of the tape.

 

[AngryMan]

I wouldn't. You don't want a large piece of polycarbonate flying around the cabin in an accident... I don't think I would even trust the tape to hold it, but I don't know the specs of the tape.

This was kinda what I was thinking also. Dropping or falling on me while I drove ....bad news. If we had to have a recall on our front windshield that was attached by really good adhesive (although not the right AMOUNT of it ) then this may not be a great idea with lesser adhesive.. Even though I love the idea of the product

 

[21st Century Pony]

I wouldn't. You don't want a large piece of polycarbonate flying around the cabin in an accident... I don't think I would even trust the tape to hold it, but I don't know the specs of the tape.

Fair point.

 

[SpaceEVDriver]

This was kinda what I was thinking also. Dropping or falling on me while I drove ....bad news. If we had to have a recall on our front windshield that was attached by really good adhesive (although not the right AMOUNT of it ) then this may not be a great idea with lesser adhesive.. Even though I love the idea of the product

I do like the idea. I just wish Ford had thought to include a lightweight sliding cover with insulating capabilities. Of course, it would have been sold as part of a $1500 option that included something irrelevant like all white wheels or whatever...

 

[azerik]

The ev 'glass is heavy. probably close to 3 lbs? I don't have a scale friendly enough to weigh it sadly.

 

[EVinsulate]

I don't think I would use this is a hot climate.

Most of the heat entering the vehicle is through absorption of visible light coming from the front windshield and re-radiation of that energy in the form of infrared light. That IR light (heat) gets trapped in the car because glass is generally opaque to IR light.



The glass roof is probably a source of 10-30% of the passive cooling of the cabin because the hot air rises to the top of the cabin and warms the most thermally conductive object at the top, which is the glass roof. The heat then is conductively transferred out of the interior. In a hot climate, the interior is going to be significantly warmer than the outside. This is especially true while moving, which sets up a forced convection thermal regime.

If you put a cloth cover like the folding sunshade between you and the glass roof, it makes the cabin feel cooler because it stops IR radiation from the glass being directed down onto you while still allowing the hot air to accumulate at the ceiling and to warm the glass, and that heat is then conducted out.

But putting a layer of thermally-insulating anything at the top of the ceiling of the Mustang will trap that thermal energy in the cabin. It won't be able to get to the glass, which is the only conduit for heat out of the top of the vehicle.

Thanks for the input. The glass roof is UV glass which is designed to absorb UV radiation which coverts it into heat energy. If you touch the UV glass then compare it to the temperature of non-UV glass (like the back window) you'll notice a huge difference. The glass roof heats up the most when stationary or driving very slow, at faster speeds it cools fairly quickly. The EVglass polycarbonate panel simply works the same way double glazing does in a building during the summer, the air gap makes it easier for the AC to keep up. It also provides a thermal barrier against the very hot UV glass roof. For those who don't mind losing their clear glass roof, one of the silver clip in covers works the best to keep the car cool.

I hope this helps.

 

[EVinsulate]

I wouldn't. You don't want a large piece of polycarbonate flying around the cabin in an accident... I don't think I would even trust the tape to hold it, but I don't know the specs of the tape.

The mounting clips that come in the package are mainly used for installation but can be used as a secondary attachment if desired (as indicated in the instructions). Apart from that, one of the reasons for the sample piece included with the package is to demonstrate how strong the bond is. It's actually stronger on the actual panel because no adhesive was used on the sample piece. I have since started using the same adhesive on the sample pieces to better demonstrate the actual bond.

 

[Jimrpa]

As it happens, I have relevent experience here. I drove a '21 Select for over a year and a half in Whitehorse, Yukon, a place where we can get into the -40s Celsius in the winter. In that Select, with the steel roof, the cabin was pretty reasonable even in the coldest weather.

A few weeks ago I traded up for a Premium with the glass roof. I didn't notice it until I drove at highway speeds, but there is a TON of heat transmitted through that glass roof and you feel it very quickly. It's a huge difference.

My experience (and others) with heat is a lot different. Of course, I don’t have -40C temps, but it is actually cooler is 30C+ temps than my old escape. You may want to poke around some of the comments from people who live in places like Arizona, Florida, and Southern California. I love the glass roof.

 

[Opa]

I don't think I would use this is a hot climate.

Most of the heat entering the vehicle is through absorption of visible light coming from the front windshield and re-radiation of that energy in the form of infrared light. That IR light (heat) gets trapped in the car because glass is generally opaque to IR light.



The glass roof is probably a source of 10-30% of the passive cooling of the cabin because the hot air rises to the top of the cabin and warms the most thermally conductive object at the top, which is the glass roof. The heat then is conductively transferred out of the interior. In a hot climate, the interior is going to be significantly warmer than the outside. This is especially true while moving, which sets up a forced convection thermal regime.

If you put a cloth cover like the folding sunshade between you and the glass roof, it makes the cabin feel cooler because it stops IR radiation from the glass being directed down onto you while still allowing the hot air to accumulate at the ceiling and to warm the glass, and that heat is then conducted out.

But putting a layer of thermally-insulating anything at the top of the ceiling of the Mustang will trap that thermal energy in the cabin. It won't be able to get to the glass, which is the only conduit for heat out of the top of the vehicle.

Which is why you tint your windshield to whatever you can legally get away with??

 

[NC-GT]

There now are excellent clear films for the windshield that help with UV, Heat, and glare. Getting quotes next week on Full Front PPF, and will also ask for details and recommendations for the windshield.

With my previous Miata and Solstice, I resorted to custom sun shades, but was always a pain using it when parking around town.

 

[21st Century Pony]

There now are excellent clear films for the windshield that help with UV, Heat, and glare. ...will also ask for details and recommendations for the windshield.

Our Mach E cars do not need windshield sun shades or film. ...unless your car does not have the IRR symbol in its driver's side lower corner like the attached pic shows.

AFAIK most if not all Mach E front windshields have a special inner IR reflective layer, which is why radar detectors or EasyPass-type toll payment systems do not work unless they are placed in the center upper stippled windshield area.

If you look very closely on my car's bottom stippled windshield area corners, you can discern the edge of the light-transparent IR reflective layer.

 

[NC-GT]

Our Mach E cars do not need windshield sun shades or film. ...unless your car does not have the IRR symbol in its driver's side lower corner like the attached pic shows.

AFAIK most if not all Mach E front windshields have a special inner IR reflective layer, which is why radar detectors or EasyPass-type toll payment systems do not work unless they are placed in the center upper stippled windshield area.

If you look very closely on my car's bottom stippled windshield area corners, you can discern the edge of the light-transparent IR reflective layer.

That is awesome! I did not know. Have only had mine less than two weeks. Sounds like all ready for the Summer sun No need to get that quote.

Just saw your note on the EasyPass - yikes need to move mine in the morning! I had it below the mirror…

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