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Thread: Solar Versus Gas with varying rates. Anyone have a spreadsheet?

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    Solar Versus Gas with varying rates. Anyone have a spreadsheet?

    Does anyone have a spreadsheet already created for comparing daytime solar heating to nighttime gas heating? I have a gas heater and an existing solar system. However, my new EV has shot my daytime power rates up to $0.47/kWh in Tier 2. I'd like to try to compare gas heating at night with $0.10/kWh electric rates + cost of gas to solar. Any tips on doing that?

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    JasonLion's Avatar
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    Re: Solar Versus Gas with varying rates. Anyone have a spreadsheet?

    Unless you have a wildly inefficient pump, solar will use less $ to heat the pool than gas by a wide margin.

    If you haven't already, the first thing to do is get a solar cover for the pool and keep it on as much as possible.
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    Isaac-1's Avatar
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    Re: Solar Versus Gas with varying rates. Anyone have a spreadsheet?

    Since you already have solar installed, another option would be to install a PV (electric) solar panel and DC powered circulation pump to pump water through the solar heating panels.

    Ike
    p.s perhaps something like this: http://www.lorentz.de/en/products/solar-pool-pumps.html
    Last edited by Isaac-1; 02-19-2014 at 04:56 PM. Reason: ps
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    Re: Solar Versus Gas with varying rates. Anyone have a spreadsheet?

    Quote Originally Posted by JasonLion View Post
    Unless you have a wildly inefficient pump, solar will use less $ to heat the pool than gas by a wide margin.

    If you haven't already, the first thing to do is get a solar cover for the pool and keep it on as much as possible.
    I don't have a wildly inefficient pump. (It's an Intelliflo VF)

    I've thought about a solar cover, but I really enjoy the convenience of being able to jump right into the pool when I get home, without the hassle of removing the cover. Adding a cover would significantly impact my enjoyment of the pool.

    Can you quantify the amount of heat a solar cover will retain?

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    Isaac-1's Avatar
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    Re: Solar Versus Gas with varying rates. Anyone have a spreadsheet?

    see my ps above
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
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    Re: Solar Versus Gas with varying rates. Anyone have a spreadsheet?

    Quote Originally Posted by Isaac-1 View Post
    Since you already have solar installed, another option would be to install a PV (electric) solar panel and DC powered circulation pump to pump water through the solar heating panels.

    Ike
    p.s perhaps something like this: http://www.lorentz.de/en/products/solar-pool-pumps.html
    Possible, but I'm not sure the ROI on a whole new pump would be sensible. Do you know ballpark pricing for these pumps?

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