INTERESTING: Maybe there’s some money to be made in solar after all?

http://readwrite.com/2015/05/01/tesla-energy-powerwall-backup-battery

Tesla‘s Powerwall: Why You Should Care Even If You Don’t Have Home Solar
Greater energy independence at a smaller cost.
BRIAN P. RUBIN MAY 1, 2015

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The U.S Energy Information Administration says that the average American home consumes about 11,000kWh per year, or about 30kWh per day. So if an average user wants to get completely off the grid, it would only take three 10kWh Powerwall units—at a total of $10,500, not counting the cost of installation, solar cells and a pricey DC/AC inverter—for that to become feasible. It may sound like a lot of money on paper, but considering the long term energy saving benefits, it’s a steal.

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Interesting concept and idea.

Maybe for my shore house? 

Put the solar panels on the roof. It gets a lot of sun year round. If you can sell the power back to the township /JCPL, then maybe the old “white elephant” could pay for some of its “freight”.

Heaven forbid, maybe it could even show a profit?

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One Response to INTERESTING: Maybe there’s some money to be made in solar after all?

  1. There’s a bug hiding in those figures though John. Note that the AVERAGE daily use is 30KWH. So (roughly) on half the days the use would be higher — at which points you’d have to pay for your regular electricity in addition to having paid for the solar. The solar units cost about $11K + ???4K??? (at a guess… could be much more) for “installation, solar cells (?), and a pricey (?) AC/DC inverter”

    If we go with the lower end… just $4K extra…. that’s $15K. If KWH’s are 20 cents per KWH, then with no solar panels you’d be spending 11,000/5 = about $2,000/year on electricity.

    Soooo… it would take at least 7 years to pay back on the system even if you never had to supplement it on the half of the days when you needed more than 30KWH. If the price and estimates were more moderate, and if you DID have to supplement a moderate amount then that 7 might get closer to 10 or even 12. Will the system last that long without any maintenance costs?

    It might. Or it might not. Hard to say until enough of them are out there for ten or fifteen years. Ecologically there’s a definite benefit so if you have the money to risk on a big up-front investment and you believe the ecological concerns are important, then it might be worth it. But it’s not nearly as much of a “sure thing” as its advocates might state.

    Michael J. McFadden
    Peace Studies, 1973
    P.S. I had to go back to fix a typo: I’d typed “Peach Studies….” LOL!

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