Stock Model 3 glass solar power rejection rate, quick finding.

[slooowr6]

Hi All,
Got the m3 couple weeks ago and feel the heat from the sun coming through the glasses is pretty noticeable. Start researching what can be done to reduce solar heat. All the info seems to point to window tint will help. Before doing the window tint I want to find out how much solar heat rejection does the stock glasses offer but I can't find much information. So I decided to get a solar power meter and get the base line myself. This is the meter I got, SP1065 | BTU/Watt Solar Meter.
The solar meter measures BTU/hr*ft^2 basically it's the energy/heat coming from the sun. I did a quick test by measure the power in front and behind the glass. It's not a scientific project but I did repeat the test multiple times for each glass. I feel it's a reasonable ballpark figure. Just want to share in case someone is interested.

Location Outside of glass Inside of glass Reject rate
Driver side 300 77 74% (This is south facing and at 2pm in San Jose, CA)
Top front 194 4 98%
Windshield 188 52 72%

I tried to measure at the same angle but again, it's not a precise measurement just a quick measure to get an idea.

 

[beachmiles]

I can't really decipher the data you are showing here.
What does "driver's side" and "top front" refer to? The reject rate percentages look decent but not sure where you are testing.

 

[EfficientWatts]

Can you also do the back glass, both the tinted part and untinted part?

 

[tracksyde]

.
Location Outside of glass Inside of glass Reject rate
Driver side 300 77 74% (This is south facing and at 2pm in San Jose, CA)
Top front 194 4 98%
Windshield 188 52 72%

Location	Outside of Glass	Inside of Glass	Reject Rate
Driver side	300	77	74%
Top front	194	4	98%
Windshield	188	52	72%

 

[slooowr6]

• Location: Outside of glass(BTU) Inside of glass(BTU) Reject rate
• Driver side 300 77 74% (This is south facing and at 2pm in San Jose, CA)
• Top front 194 4 98%
• Windshield 188 52 72%

Location	Outside of Glass	Inside of Glass	Reject Rate
Driver side	300	77	74%
Top front	194	4	98%
Windshield	188	52	72%

Thanks! This is so much better!!

 

[slooowr6]

Can you also do the back glass, both the tinted part and untinted part?

Sorry for the delay, here it is. It's taken 10am in San Jose.

Location	Outside of Glass	Inside of Glass	Reject Rate
Driver side	300	77	74%
Top front	194	4	98%
Windshield	188	52	72%
Rear window tinted part	200	4	98%
Rear window non tinted part	200	29	85%

 

[slooowr6]

 

[CharleyBC]

I thought I was pretty happy with the top glass. Now we have numbers to prove it!

 

[chinnam3]

Location	Outside of Glass	Inside of Glass	Reject Rate
Driver side	300	77	74%
Top front	194	4	98%
Windshield	188	52	72%
Rear window tinted part	200	4	98%
Rear window non tinted part	200	29	85%

Sorry, this terminology is confusing to me.May be others got what you mean.
What is meant by Driver side? Is this Driver Side Window glass (not roof)?
What is Top front? Is it area in the windshield above camera mount, but not the roof glass?
Rear window? Are you referring to rear portion glass of the roof? or is it referring to side window glass?

 

[slooowr6]

Location	Outside of Glass	Inside of Glass	Reject Rate
Driver side	300	77	74%
Top front	194	4	98%
Windshield	188	52	72%
Rear window tinted part	200	4	98%
Rear window non tinted part	200	29	85%

Location	Outside of Glass	Inside of Glass	Reject Rate
Driver side	300	77	74%
Top front	194	4	98%
Windshield	188	52	72%
Rear window tinted part	200	4	98%
Rear window non tinted part	200	29	85%

 

[slooowr6]

Let's see if this helps.

Location	Outside of Glass	Inside of Glass	Reject Rate
Driver side: front side window glass	300	77	74%
(Sunroof) Top front piece	194	4	98%
Windshield	188	52	72%
(Sunroof) Rear piece tinted part	200	4	98%
(Sunroof) Rear piece non tinted part	200	29	85%

 

[chinnam3]

Let's see if this helps.

Location	Outside of Glass	Inside of Glass	Reject Rate
Driver side: front side window glass	300	77	74%
(Sunroof) Top front piece	194	4	98%
Windshield	188	52	72%
(Sunroof) Rear piece tinted part	200	4	98%
(Sunroof) Rear piece non tinted part	200	29	85%

Thank you!

 

[beachmiles]

Thanks I think I get it now. You may want to call the "Driver side: front side window glass" just the
"driver's side window".

Was you M3 purchased new? Or was it used?

 

[slooowr6]

My M3 is new delivered on 8/21/2019, it's the SR model.

Location	Outside of Glass	Inside of Glass	Reject Rate
Driver's side: front window	300	77	74%
(Sunroof) Top front piece	194	4	98%
Windshield	188	52	72%
(Sunroof) Rear piece tinted part	200	4	98%
(Sunroof) Rear piece non tinted part	200	29	85%