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OFFICIAL Tesla Solar Roof thread

Discussion in 'US' started by InElonWeTrust, Jan 12, 2017.

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  1. InElonWeTrust

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    A very interesting video on the cost of going solar with Tesla's recently unveiled solar roof option. Enjoy

     
  2. Topher

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    I do worry that Elon says it has more insulation value. The insulation value of one's foof tiles is almost never an issue. Most roof's are vented below the tiles, and certainly should be vented for solar tiles since heat degrades their performance. So the insulation value buys nothing.

    Thank you kindly.
     
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    • Steve C

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      His 20k replacement cost of an asphalt roof seems way to high. I have a large roof and was quoted $10k (Including removal). I would love the solar roof but I can't imagine that they would come even close in cost.

      They have to remove the shingles that are on (2 layers in my case) and then install the glass shingles and wiring. I will eventually get an estimate on it but my first guess is an easy $40k. I will advise when I get a proper quote.
       
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      • InElonWeTrust

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        I fear you're right. I recall very clearly that leading up to the event, Elon said it would be in line with a standard roof replacement, "when you factor in the savings on electrical." Then at the actual event at Universal Studios, he dropped the "factoring in variable". I was ecstatic being that I need a new roof very soon. Time will tell.....
         
      • MelindaV

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        I don't think Elon's idea of a standard roof is an asphalt shingle roof, but a shake or tile roof.
        Not much (short of a blue tarp with a few bricks to keep it in place) is going to beat the price of an asphalt shingle roof.
         
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        • Steve C

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          Yes. I think his idea of a standard roof are those clay tiles that are very popular in California.
           
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          • Badback

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            Seems from some Youtuber that the clay tiles are cheaper than asphalt. I will try to find the link.
             
          • Steve C

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            IMG_8014.PNG
            Doesn't make sense to me.
             
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            • BigBri

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              Might be a California incentive thing? In my neck of the woods you almost never see tile roofs. Maybe its a cold/snow thing? Everyone is Asphalt or steel if you want the 25-50 year life on it. We've half been thinking on building a house in the next 5 years and will probably consider a solar roof heavily or a lot of solar panels. Will most likely optimize the home to suit the roof/panels. Figure a bungalow with bigger footprint would suit the setup much better then a 2 or 3 story place like I've got now with a tiny roof.
               
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              • Badback

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                Thanks for finding it. I also thought that he had it wrong. I can't imagine that the clay tiles are so cheap. And, it can't be easier to install tiles than shingles. So, go figure!
                 
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                • Topher

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                  Yes, nobody sane puts clay tiles on a roof that gets significant snow.

                  Maybe. 2 story houses have a lot of advantages, and a steep roof necessary to shed snow, makes a nice place for solar panels. Get a competent analysis done before investing lots of money. My house has an 860 ft² footprint (1.5 story cape), and a 45° roof, solar PV for the whole house plus one electric car would only occupy half the roof. The main trick is to keep that roof SIMPLE; no skylights, no multiple gables, as few penetrations as you can manage (and those on the North side).

                  Thank you kindly.
                   
                • BigBri

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                  Makes sense. Can probably calculate it with the snow melting capabilities of the solar tiles Elon was talking about and how much it takes away. It is years away so I'd be starting at square1 with solar in mind. Would want to be as off grid as possible.
                   
                • Steve C

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                  The problem with your solution is that SIMPLE is PLAIN. The whole reason for solar shingles is so you can still have a beautiful roof line and still generate power.

                  If you are using solar panels, then a simple rood is obviously preferred but also not as attractive.
                   
                • Topher

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                  The problem with a complicated roof is that it makes you look stupid. It doesn't matter if you have regular panels or solar shingles, if they are in the shade of your roof-line, they aren't producing. Complicated roof-lines are also a great way of increasing the initial price of the house while not making it any better; the stupidity of 'fashion' applied to something that should last centuries, but will be need to replaced in 30 because of that.

                  Thank you kindly.
                   
                • Steve C

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                  #15 Steve C, Jan 16, 2017
                  Last edited: Jan 16, 2017

                  You're right. This house looks totally stupid. o_O

                  house.JPG
                   
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                  • Topher

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                    A properly done PV system should have no trouble with shedding snow, even without Elon's heating tiles. Tilt it appropriately, give the snow somewhere to go, you are all set. [I did the calculations, melting all the snow of your solar tiles, takes 3-4 days of all the energy they produce (from you batteries obviously) so that requires a larger battery system. Fortunately, it is unlikely that you would need to melt all the snow, melt a little of it and the rest slides off the roof.

                    Off-grid is a great way to go if you are looking for cheap land. Around here you can buy 10 times the acreage if it isn't near the grid. Of course, that means you have to have a need for 10 times the acreage, but there are plenty of ways of turning land into greater global sustainability.

                    On the other hand, if you are already close to the grid, connecting to it, makes things a lot cheaper without really restricting your ability to be as green as you want. Offsetting peak electricity times with solar, and taking it back at night when demand is low, helps your neighbors as well as yourself.

                    Thank you kindly.
                     
                  • Steve C

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                    What @Topher would like your house to look like is this.

                    boring house.JPG
                     
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                    • Topher

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                      Exactly what I was talking about. Thank you for that great example.

                      If we assume that this is the South face, there is NO place on that roof, big enough for even solar tiles, that gets even half sun.

                      Or, look at the center triple gable. That gains exactly zero living space, increases the potential leaks locations by at least 40 linear feet that I can see, has numerous places where snow will accumulate leading to potential ice dams. Neither the builder nor the architect (if it had one) expect this house to last more than 50 years.

                      My architect associates refer to this as "more money than taste." to which I add, "more money than brains."

                      Thank you kindly.
                       
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                      • Steve C

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                        Sometimes it isn't about living space but aesthetics. Sometimes you want your residence to make you smile when you pull in the driveway. That's all I am saying. Fortunately I don't have your architect.

                        That house is perfect for Solar shingles. It won't get as much energy as a boring roof, but it would make me smile.
                         
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                        • Topher

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                          Here is what I am actually talking about:
                          [​IMG]

                          (Please forgive the uncompleted state, I get invites when you can still see the bones)

                          This house probably cost less than that first ugly monstrosity @Steve C posted. It is in snow country, but could be heated for about $200 per year since it is a Passivhaus. The entire volume under that roof is used, including a loft and cathedral ceiling looking out at the view. Covering the South side with PV panels would net about 5 times the total electrical usage (including heat) of the house (the house and outbuildings will net-positive on Carbon). There are zero places where the heavy snowfall the area gets, will get caught up and damage the house, in fact the snow will probably shed about an hour after the first sun hits it. No heated solar tiles needed. The builder of this house is so confident about its performance, that he pays the first 5 years of heating costs.

                          Although the house is pretty, the real beauty is in the surroundings. You can sit on that porch and look out at what you protecting by building like this.

                          Thank you kindly.
                           
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