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

Discussion in 'Model 3: Interior & Exterior' started by slooowr6, Sep 28, 2019.

  1. slooowr6

    slooowr6 Member

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    Location:
    san jose CA
    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. :)
     
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  2. beachmiles

    beachmiles Member

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    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.
     
  3. quantumslip

    quantumslip Member

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    Houston, TX
    Can you also do the back glass, both the tinted part and untinted part?
     
  4. tracksyde

    tracksyde Member

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    Location:
    So Cal





















    Location Outside of Glass Inside of Glass Reject Rate
    Driver side 300 77 74%
    Top front 194 4 98%
    Windshield 188 52 72%
     
    • Informative x 2
    • Helpful x 1
  5. slooowr6

    slooowr6 Member

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    Location:
    san jose CA
    • 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%
    Thanks! :) This is so much better!!
     
    • Love x 1
  6. slooowr6

    slooowr6 Member

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    Location:
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    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%
     
    • Informative x 5
  7. slooowr6

    slooowr6 Member

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    Location:
    san jose CA
    IMG_20191002_100619(1).jpg IMG_20191002_100635.jpg
     
    • Informative x 1
  8. CharleyBC

    CharleyBC Active Member

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    Sacramento
    I thought I was pretty happy with the top glass. Now we have numbers to prove it!
     
  9. chinnam3

    chinnam3 Member

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    Bellevue
    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?
     
    • Like x 1
  10. slooowr6

    slooowr6 Member

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    Location:
    san jose CA
     
  11. slooowr6

    slooowr6 Member

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    Location:
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    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%
     
    • Like x 2
    • Helpful x 1
    • Informative x 1
  12. chinnam3

    chinnam3 Member

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    Thank you!
     
  13. beachmiles

    beachmiles Member

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    Location:
    Redondo Beach
    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?
     
  14. slooowr6

    slooowr6 Member

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    Messages:
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    Location:
    san jose CA
    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%
     

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