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SolarCity Plans To Release New 'Solar Roof' Product Next Year (computerworld.com)

An anonymous reader writes: SolarCity, the American provider of energy services recently purchased by Tesla Motors for $2.6 billion, is planning to produce a new "solar roof" product next year. Computerworld reports: "Five million roofs are replaced each year in the U.S., so instead of simply swapping out old shingles with new ones, why not turn the whole roof into a solar power generator that's integrated with your home's electrical utility? That is SolarCity's plan for a new product it expects to begin producing next year, according to statements made during the company's second-quarter earnings call last week. During the call, SolarCity Chief Technology Officer Peter Rive alluded to a new product that would be produced at the soon to open Buffalo, N.Y., solar panel manufacturing facility. Then SolarCity co-founder and Chairman Elon Musk interjected and said the product would be a solar roof, 'as opposed to a [solar] module on a roof.' The solar roof also has the advantage that it doesn't 'cannibalize' any existing SolarCity product, such as solar panels installed atop roofs, Musk said." "If your roof is nearing end of life, you definitely don't want to put solar panels on it because you're going to have to replace the roof," Musk said. "So there's a huge market segment that's kind of inaccessible to SolarCity. So, why not have a solar roof that's better in many other ways as well," he continued. "We don't want to turn over all our cards right now, but I think people are going to be really excited about what they'll see."

25 of 160 comments (clear)

  1. How durable? by Jason+Levine · · Score: 3, Interesting

    Here in upstate NY, winters often mean that I need to get out our roof rake to pull snow off our roof. If I don't, ice dams form and then runoff from melting snow gets under our roof shingles and can get into our house. My questions for SolarCity would be: Would these solar shingles hold up to having a roof rake scraped across them? (It would be useless if I had to replace shingles every year due to roof raking damage.) Also, how would they handle snow melt getting under the shingles? Presumably, there will be wiring there. Would moisture under the shingles cause issues?

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    1. Re:How durable? by Ogive17 · · Score: 4, Interesting

      I think the intention is the replace the shingles and have your roof made out of solar panels.

      I've had this same idea for a long time. There's no benefit of asphalt shingles other than the relatively low cost. If you could replace your roof with a solar panel system that #1 protected your home and #2 provided a significant amount of power generation I wonder what the total cost of ownership would be. At current electricity rates, I'll pay about $20,000 over the next 20 years to the electric company. I would also pay $15,000-$20,000 every 20-30 years to get new shingles.

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    2. Re:How durable? by Anonymous Coward · · Score: 5, Interesting

      They have an inversion mode where rather than generate electricity from sunlight, the voltage is reversed and they consume electricity and produce heat. This melts any snow and ice present. Right now this is a manual switchover by the homeowner, but I would expect an optical sensor in the future that detects when the light is being obscured by snow and acts accordingly.

    3. Re:How durable? by Nunya666 · · Score: 5, Insightful

      Here in upstate NY, winters often mean that I need to get out our roof rake to pull snow off our roof. If I don't, ice dams form and then runoff from melting snow gets under our roof shingles and can get into our house. My questions for SolarCity would be: Would these solar shingles hold up to having a roof rake scraped across them? (It would be useless if I had to replace shingles every year due to roof raking damage.) Also, how would they handle snow melt getting under the shingles? Presumably, there will be wiring there. Would moisture under the shingles cause issues?

      Roofs are designed to prevent ice dams. If you are getting them, then your roof (or attic) needs help. Most likely, you don't have enough insulation in your attic. Ice dams happen because the underside of the snow on the roof is warm enough to melt the snow. That warmth comes from the attic. The attic should be cold enough that the roof material stays cold, and the snow on the roof doesn't melt on the underside.

      I used to get ice dams on a home in Michigan. It already had insulation between the joists, but that wasn't enough. Adding a second layer of insulation, perpendicular to the joists, resolved the ice dam issue.

    4. Re:How durable? by morethanapapercert · · Score: 2
      Since most photovoltaic cells have a glass or polycarbonate top layer, I would think that you wouldn't have to rake snow any more. Depending on the slope of your roof of course. Like people with metal or slate roofs, especially steep ones, you'd be more worried about installing snow guards to keep the snow up there, and not avalanching on top of people. (I once saw a homeless man get clobbered by a mass of ice and snow that fell off the steep slate roof of the church he was standing beside. The unfortunate gentleman did not survive the experience)

      Come to think of it, because of UV considerations, I would assume that any roof top application of photovoltaic panels would use glass instead of some plastic. You have to assume similar life expectancies as with other roofing materials after all (10 yrs min, usually 25 to 50 IIRC) and even UV resistant plastics discolour and even become brittle over those sorts of time frames.

      Speaking as a former roofer, my recommendation for most residential applications would be to install this new roofing and place snow guards, artificial dormers or roof crickets over every entrance way. I would go with dormers or crickets over entrances because that would still let the snow shed from the glass surfaces naturally. Thus; you would minimize how often you had to go out and clean the roof. Light dustings or ice could still accumulate, and with that the problem would be cutting down on PV output. My ideal PV roof solution would include embedded wires that heat the surface to just above freezing temps, either automatically, or manually. Anyone who drives in snowy regions knows what a big difference those wires in the back glass of their vehicle make when it comes time to clean the car before heading to work...

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    5. Re:How durable? by MachineShedFred · · Score: 2, Informative

      Except that SolarCity installs plenty of systems in New York, and is building their manufacturing facility in Buffalo.

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    6. Re:How durable? by Ol+Olsoc · · Score: 5, Insightful

      I think the intention is the replace the shingles and have your roof made out of solar panels. I've had this same idea for a long time. There's no benefit of asphalt shingles other than the relatively low cost.

      I hate those damn things. We have a low pitched roof and shingles don't last long on them. So it's like every 10 years and new ones. As well, if they aren't laid right, heaven help you. Some asshat replaced them before we bought the place, and had a small place, about an inch square where they didn't cover. Right on a gutter We got a lot of wood rot right there. That was fun to fix.

      I wanted to go metal last time we replaced them, but my better half thought metal "looked cheap" However now that we are looking at our third replacement, and she's changed her mind. But these solarpanels? Very interesting indeed.

      If you could replace your roof with a solar panel system that #1 protected your home and #2 provided a significant amount of power generation I wonder what the total cost of ownership would be. At current electricity rates, I'll pay about $20,000 over the next 20 years to the electric company. I would also pay $15,000-$20,000 every 20-30 years to get new shingles.

      Make certain to do your own calculations, and not rely on people who have a vested interest in you using some other method. I bought a new super high efficiency gas furnace, replacing my oil furnace, 4 years ago - it's already paid for itself. Oil people said it might be 15 years.Same with insulation. I'm spending per year what some friends pay per month in energy.

      As well, there are the incalculables. Access to the electricity. We have a lot of power outages in my area. And with the whacked weather, we are sometimes out for a while - one time almost a week. Your own power source can make life a lot nicer. It was nice to have lights and furnace that week. Note I wasn't using solar that week, just another power source.

      --
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    7. Re:How durable? by nycsubway · · Score: 5, Informative

      Maybe you could rake it with a wide broom or plastic snow rake. Our neighbor has solar panels on his roof and most of the time the snow slides off after the first sun starts to hit it. Unless its overcast for a few days after a snow, it always seemed to melt off quickly. He did use a broom a few times with new snow, but the sun and melting seem to go hand in hand anyway. And there's no need to clear the snow if there's no sun for the solar cells to use.

      So, maybe in the case of a 2ft snowfall you could clear it, but that glass does a good job clearing itself anyway.

    8. Re:How durable? by whoever57 · · Score: 2

      There is lots of solar being installed in the UK, which is further north.

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    9. Re:How durable? by MTEK · · Score: 2

      The people behind this technology (and autopilot), given where they work, probably can't fathom why anyone would live in your climate. Your snow issues are an edge case. SORRY! ;)

    10. Re:How durable? by Slyfox696 · · Score: 5, Informative

      I wanted to go metal last time we replaced them, but my better half thought metal "looked cheap" However now that we are looking at our third replacement, and she's changed her mind.

      Off-topic but my father-in-law is a fireman. He's said many times that the best way to ensure total destruction of your home and property in a fire is to have a metal roof.

      I'm not an expert, but basically the metal traps all the heat and forces it downward and most firefighters (at least in my area) won't go into a building with a metal roof on it except only to save human life. And, even then, the chances of saving someone are lower.

      Just something to think about.

    11. Re:How durable? by angel'o'sphere · · Score: 2

      What kind of Shingles do you use in the US that you have to replace them so often?

      Replacing roofs in Germany is a rather rare activity. I doubt it happens more often than every 50 years.

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    12. Re:How durable? by Teun · · Score: 2

      The City of Ontario (Yeah I know, not the USofA) is about level with Genoa in Italy (+44deg), Southern Ontario is about level with Rome.
      In Europe solar works out fine way up north, I live in a rather rainy = cloudy place at +52deg. and the investment it pays back in around 7 years.
      That's better than the bank who pays 0.5%.BR> But remember in Europe we have high taxes on energy, something we don't pay on our own generation.

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    13. Re:How durable? by amiga3D · · Score: 2

      I've never heard of quality well installed asphalt shingles not lasting at least 15 years. My Dad's last install lasted almost 25 and I know the last house I had shingled was in 1995 and although I sold it 6 years ago I just drove by it a month ago and it still has the same shingles on it. I've seen shingles fail through bad installation practices. The set I installed in 95 I sat and watched the men installing it and when they pulled the old roof they started to drive the roofing tacks into the wood. I jumped all over them and made them pull those. Nails will work their way out of wood and cause leaks after time and I wasn't having that. You have to watch contractors because so often the problems they cause wont show for a decade or more and they know it.

    14. Re:How durable? by LunaticTippy · · Score: 4, Interesting

      Fascinating. In dry western wooded mountain areas people are installing metal roofs because it is one of the most resistant to catching on fire during one of the wildfires. A friend was told by the fire department to install a metal roof!

      I suppose it could work both ways. A fire that starts inside your house will have no chance to get out (letting water and firemen in) but a fire that starts outside won't be able to get in easily.

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  2. I've sort-of-being looking into this myself. by queazocotal · · Score: 2

    As DIY. Solar panels are not wholly ridiculous any more as roofing material - at least for smaller roofs.
    For example, I have a 5*20m roof.
    Wholly replacing the skin of this with solar panels would cost around $6K. This is a large number - but not hugely much in context of the whole roof replacement. Optimising for cost per area, rather than cost per watt, and finding some nice way to fix with integral insulation, for example could greatly speed assembly of the roof.

  3. Self-driving shingles by PopeRatzo · · Score: 3, Funny

    This will be the Uber of solar roofs. It's a game changer.

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  4. Re:Somebody quote that "reasons why not" list at h by Anonymous Coward · · Score: 4, Insightful

    And all those reasons are why solar roofs don't exist everywhere else in the world.

    Oh wait, they do.

  5. Solar bubble? by ErichTheRed · · Score: 4, Insightful

    I wonder how much of this solar build-out is due to an economic bubble in the industry. We've been looking into solar since we have a new roof, and the impression we've gotten both from SolarCity and a parade of local contractors is that they're all lining up before the (very lucrative) tax credits go away. Neither methods (leasing or paying for the system outright) seems like a particularly good deal. If you go the SolarCity route, they take your tax credit _and_ charge you monthly for your panels. If you go the local guy route, you pay (in my mind) hugely inflated prices, and they're trying to cover that up by saying "look at how much of a tax credit you're getting!" since it's a percentage of the price of the system.

    I'm guessing all these local solar companies are going to be gone as soon as the tax credits dry up...there's no way they can continue selling systems for the prices they're charging. My impression is that these local solar companies are run by the typical hustler type who always has their eye on the next big money making opportunity, and will be on to the next one as soon as the business is inconvenient. It's too bad, because I'd definitely go for it if they would charge reasonable rates and not try to dupe idiotic homeowners who can't see past the tax credit carrot. In my mind, SolarCity is even more of a flat-out scam; they're the ones offering "no money out of pocket!" conversions, conveniently forgetting to mention that you're locked into a leasing contract with them. It's the perfect setup for them - the same mentality that goes into car leasing. Can't afford an S-class Mercedes? No problem, $999 a month, look, it's cheaper than a loan! Such a deal! Sign today!!

    1. Re:Solar bubble? by AmiMoJo · · Score: 4, Insightful

      It's an investment. Like putting better insulation in, or a more efficient heating/aircon system, or paying more for a diesel engine because it's cheaper to run (er...)

      Depending on where you live it takes more or less time to start paying off, but in northern Europe and similar climates you should be looking at 5 years to pay for the system and then it's all profit. It's a very safe investment too, guaranteed pay back and as energy prices rise it will almost certainly keep getting better.

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    2. Re:Solar bubble? by thinkwaitfast · · Score: 2

      It's not in your mind. All of the solar businesses that I've seen, granted only four, charge a ridiculous amount of money for doing a couple hours of trivial work. One wanted nearly $5k for doing work that took me 4 hours + $300 to get a certified electrician to sign off.

    3. Re:Solar bubble? by thinkwaitfast · · Score: 2
      It is easy and relatively cheap, but you have to live in the right area. I assume since you use GBP you are in or near England. Bad idea. Someplace like the American southwest will have 2-3x more insolation making it 2-3x less expensive. I get 6 hours of good sunlight per day, 350 days a year and 12hours in the summer when it is needed the most (running the AC, by far the largest user of electricity in my house). 2.5kw of solar panels easily powers my house year round, it's invisible, nearly maintenance free (5 minutes/week battery check) and I have 30A of clean 120v sinewave power running into my breaker that feeds all the standard outlets. I could bring in electricity from the street, make one connection (two wires) and not know the difference.

      It's funny you mention home wind turbines. The builder in the neighborhood where my parents bought their house offered a wind turbine option with their houses. In two square miles, there was only one person who chose this. I think it generated something like 25 watts when the wind blew (rarely). When they sold the house, the new owners took it down,

  6. Dang it! by tsstahl · · Score: 2

    Bass turd had to wait. I just replaced my roof, half of which faces due south.

    Seriously, it would be a great option if the price were comparable to, or within 30% of a regular asphalt shingle new roof.

  7. Re:Not new by kaiser423 · · Score: 4, Insightful

    They very well might. Never underestimate the power of timing combined with marketing. It's what made the iPhone and countless other products.

    I looked at the Dow and other systems, and they were quite expensive and not really wanting to talk to individual home owners, and when they did it was ridiculously obtuse and no installers would touch the things. They were 5 years too early and didn't have enough juice to make it happen, both likely inside of the company to essentially go all in, nor with public mind-share and installer credibility.

    Cells are much cheaper now, home solar is much more of a known commodity, and you have a company with nation-wide installation presence fronting the install and handling all of that, and a man with free-press touting this. It definitely could have legs. If Musk does one thing well, it's identify things that are good ideas and feasible, but everyone is timid about, and then just take that idea and go balls-to-the-wall all out bet everything on it. Thus, he becomes a driving force, and every success adds to his confidence and ability to take massive bets and the cycle continues.

  8. Re:Ease of assembly by netsavior · · Score: 2

    I live in Texas, and it is kind of shocking that here, of all places they passed a law preventing municipalities and HOAs from making laws or rules against installing rooftop solar. So basically that takes care of 10% of the landmass of the lower 48 states as far as your first 2 concerns.