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Solar shingles

D107 Member Posts: 1,849
looks like the way of the future.

interesting quote from article:
a 2 kilowatt pv system in albuquerque produces 25% more electricity than the same system in Boston (less sunlight), but the savings are greater in boston since electricity costs so much more.


  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928

    Does seem better than the systems built into asphalt shingles that have little or no chance of every paying back...

    $12,000 for 1 kw. 10¢ kwh * 10 hours/day = $1 per day.

    12,000 days = 33 years or so. Sure hope they're better than the other modern fiber-cement shingles like Suprador that often didn't outlast asphalt. The old asbestos-cement shingles would go for 75+ years with a decent pitch like 8/12 or higher.

    BTW that's significantly more than I pay for electric and 10 hours/day of full output seems an extremely generous estimate.
  • D107
    D107 Member Posts: 1,849
    article says they got a 2-KW system for $15K

    which they rolled into their mortgage, adding $100/mo to carrying costs. Then they'll get a 30% federal tax break up to $2000 towards the cost of the system. 'Her last electric bill was $3.85..' BUT 'factoring in equipment and installation costs, the price of a KW of solar energy is about 25¢, versus 10¢ for natural gas or coal-generated.'

    Funny with all the walls posts on solar I've seen I had been thinking the only way to make it worthwhile is to incorporate the cells into all the building materials of a house--brick, clapboards, windows, sidewalks, even our clothing. Price will just have to come down and the government will have to increase incentives.
  • Larry (from OSHA)
    Larry (from OSHA) Member Posts: 716
    it's what you do with it

    Solar is great for making hot water, but it does seem a bit less economical to get serious payback for electric. I just had the wonderful opportunity to spend a week in Hawaii where it seems that everyone is making hot water with solar. The house we stayed at had a 119 gallon tank with a roof mounted collector. 180 degree tempered down to 115 and there was no way the five of us could run it out!
  • Gordy
    Gordy Member Posts: 9,546

    10 watts a square foot at 120.00 a square foot for the PV shingle seems way steep for what they can do. Solar electric has a ways to go to be affordable with a decent payback time frame.

    I wonder how atmospheric crud that will collect on the tempered glass decreases performance. Maybe not at all.

    Seems like a product for the sharper image catalog.

  • Larry Weingarten
    Larry Weingarten Member Posts: 3,233
    another perspective

    I built a house off grid. The house is quite efficient so needs only 630 watts of photovoltaic to power it. All the conservation and solar didn't run over $10,000. Undergrounding PG&E would have been at least $50,000. So, this solar was cost effective from the start. ;~)

    Yours, Larry
  • Gordy
    Gordy Member Posts: 9,546
    Off Grid

    Weil the only thing I can say Larry is... Don't build off Grid, and it would not of cost ya 10'000 ;^)

    If one does decide to build off grid then they know what they are up against as you were,willing to spend the money to do so.

This discussion has been closed.