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Thread: Would like your opinion about this solar panel setup.

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    Would like your opinion about this solar panel setup.

    Last year I purchased 2 2'x20' panels for my 24' AGP. The results were noticable, but not where I want them to be, so I purchased 2 more panels this year. I also decided to replace the very difficult to use Home Depot valves, and go with Jandy valves, since I do plan on automating them soon. The panels are located next to the pool (on the ground last year, probably on a custom built rack this year). Can anyone see any major problems with the new valve layout?


    Click to enlarge

    Would like to find out before I start gluing parts together

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    Mod Squad Bama Rambler's Avatar
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    Re: Would like your opinion about this solar panel setup.

    I don't see anything wrong with it but would you explain the placement of the temp sensors?
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    Re: Would like your opinion about this solar panel setup.

    The plan is to take readings before the cold water enters the panels, and after. Is there a better location for these?

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    Mod Squad Bama Rambler's Avatar
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    Re: Would like your opinion about this solar panel setup.

    I might move that one on the inlet side to the skimmer plumbing but it really shouldn't make a difference.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    JasonLion's Avatar
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    Re: Would like your opinion about this solar panel setup.

    The standard way to automate solar requires measuring the temperature of the panels, not the water coming back from the panels. You need to be able to know how warm the panels are even when no water is flowing to them. Of course, it is also nice to know the temperature of the water coming back from the panels, it is just that the automation doesn't need it.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Would like your opinion about this solar panel setup.

    So basically as long as the panel temperatures are higher than ambient temps, redirect the water via the valves? Originally I was going to use the temp of the water exiting the panels, but someone else just explained to me that measuring the panels is the correct way. I guess I need to find some pictures showing how these sensors are mounted on the panel.

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    Re: Would like your opinion about this solar panel setup.

    You should have one measuring pool temp and one measuring panel temp. I think my valves open to the panels when there is more than an 8 degree difference. Place the solar panel sensor right next to panel
    25000 gal inground freeform plaster pool with spillover hot tub. 1.5 hp PacFab Challenger pump, Hayward DE filter, Natural Gas heater, BBB convert 2009, Aquasol solar panels on ground rack 2010, PS-4 controller 2010, Rocky roller, SWG 2011.

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    Re: Would like your opinion about this solar panel setup.

    Do you happen to have a picture of your probe location? I am having trouble trying to picture how to permanently affix the sensor to the panel.

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    mas985's Avatar
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    Re: Would like your opinion about this solar panel setup.

    The purpose of the panel temperature probe is to measure the sun's energy hitting the panels. So the probe is usually strapped to one of the pipes feeding the panels. There is a small flange on the probe which can be attached directly to the pipe with a cable tie. If done correctly, the probe itself will be slightly above the pipe. If the probe part touches the pipe or panel it will read a lot cooler than it should and could shut down the solar valve when there is still heat hitting the panels.
    Mark
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    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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