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Thread: Solar panels, a realistic solution to charging?

  1. #1
    Senior Member SCW-Greg's Avatar
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    Solar panels, a realistic solution to charging?

    Solar panels on the home?
    Okay so I'm a novice on solar technology, understanding only that electricity is produced during the daytime. And perhaps there is a thread on this already, if so please point me to it.

    If your discharging your EV primarily during the day, and charging at night... how then can you harvest solar energy for this purpose. Thinking too, that most of your home energy needs occur during the morning and evening hours. Are you just offsetting your demand and giving back to the grid? I can't imagine that there are storage systems for the home, to unload from when needed later - is there?

    Just curious to understand, how some threads seem to indicate you can charge your Tesla completely from solar. What viable technology solutions are out there today?
    Last edited by SCW-Greg; 2012-07-08 at 03:28 PM. Reason: A couple of typos

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    Senior Member Lloyd's Avatar
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    In my area I feed power to the grid with solar and get credit for about 48 cents per Kwh. I then charge a night and pay much less, about 12 cents per Kwh. Overall I produce about as much as I use, even with an EV!
    SP-2823(sold), Tesla/Rav4EV, P+17252, XP-12

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    Roadster #1144 + Sig 114 dsm363's Avatar
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    Check out Solar City if they operate in your area. Solar systems are typically connected to the grid but you can get storage systems to save your power for later use. My parents have a solar system installed at their house and it is tied to the grid. There are as number of people on this forum with large solar systems with more information.

    Solar Panels Oregon & Solar Installers in Oregon OR - SolarCity

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    Senior Member SCW-Greg's Avatar
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    Quote Originally Posted by dsm363 View Post
    Check out Solar City if they operate in your area. Solar systems are typically connected to the grid but you can get storage systems to save your power for later use. My parents have a solar system installed at their house and it is tied to the grid. There are as number of people on this forum with large solar systems with more information.

    Solar Panels Oregon & Solar Installers in Oregon OR - SolarCity
    Didn't know they were here already. I just filled out their form for a consult. Our HOA doesn't currently allow for this, I think. But I'm on the board, and we're talking about rewriting the roofing code right now as it is. This is the future.

    Thanks!

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    Senior Member SCW-Greg's Avatar
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    Quote Originally Posted by Lloyd View Post
    In my area I feed power to the grid with solar and get credit for about 48 cents per Kwh. I then charge a night and pay much less, about 12 cents per Kwh. Overall I produce about as much as I use, even with an EV!
    Yeah this sounds great Lloyd. That's kind of what I figured (giving back to the grid). Didn't know about the kwh incentives though. We plan on being in our home for a minimum of 10 years, do you know what your payback / break even period is?

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    Model S VIN P01536 Robert.Boston's Avatar
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    Most people have the solar system set up as grid connected: you send power to the utility when you have surplus, and buy power when you need more than your panels are producing. In some areas this works well, as the utility effectively acts as a free battery. Whether that works for you depends entirely on the utility tariff.

    As mentioned above, Solar City is marketing a panel + battery option that could allow fully off-grid operation. Whether that is economically rational entirely depends on your utility rates. Most off-grid people I know choose that either out of necessity or conviction.

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    Roadster #1144 + Sig 114 dsm363's Avatar
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    Don't know if it is accurate but found this
    Solar Calculator

    Disregard this calculator. It seems to wildly overestimate the costs of solar.
    Last edited by dsm363; 2012-07-09 at 05:25 AM.

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    Senior Member SCW-Greg's Avatar
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    Quote Originally Posted by dsm363 View Post
    Don't know if it is accurate but found this
    Solar Calculator
    Yeah... Funny, here in Oregon, the solar calculator says we get 4 hours of sun per day! LOL The calculator seems to be running a bit high - $77k I also filled out a request for quote online earlier today with SolarCity... and a guy called me in person within 30 minutes - on a Sunday! Impressive.

    We walked through some scenarios, but he estimates my house to be 100% covering my electrical would be around $20k of panels and inverter installed. Of course he's the phone sales guy. I have an actual estimator coming out to my house on Wednesday though. These guys move fast.

    The thing I didn't think about, is that I have a cedar shake roof that has about 3 to 5 more years left on it (it's old), and they won't install on shake roofs. Further our HOA doesn't allow for comp roofs, at least not yet. There are many here who do want to change and allow for that though.

    But I gotta think that with inflation, and being net neutral on power it would also skew house have better resale value, when we ever do sell.

    Hmmm.

  9. #9
    Roadster #1144 + Sig 114 dsm363's Avatar
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    Putting the panels on then taking them off 3 years later would be a pain. Hopefully you can get rule changed then get a new roof before you install your system. Good luck.

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    Quote Originally Posted by SCW-Greg View Post
    Further our HOA doesn't allow for comp roofs, at least not yet.
    That is mind boggling. I wonder if that'd really hold up in court. I can understand an HOA not letting you pick hot pink as a shingle color, but saying you can't use composite seems beyond the limits of their power. They'll let you have solar panels though?

    Had Solar City look at my house in Aloha, OR, but I'm in a bad spot and not nearly enough of my roof gets good sun coverage so it wouldn't pan out for me

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