hot tub solar heater -Solar Hot Tub Heater

March 8, 2014 – 9:21 pm

Video Rating: 4 / 5

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  1. 25 Responses to “hot tub solar heater -Solar Hot Tub Heater”

  2. dude great video, i just wish i could hear what you were saying over that
    stupid song:)

    By fu7ckyoutubification on Mar 8, 2014

  3. I have a thick cover on the tub. I set the tub for 102 degrees, and on warm
    days the solar panel will get it up to 105-106, which is a tad warm. By
    morning it might be down to 104. I estimate about a degree a day of loss
    during the summer without anything connected to the tub. The solar panel
    keeps it up around 102-104 during the spring/summer/fall months with no
    electricity use. This is a smaller tub (300 gallons). If you have a large
    tub, you might need two panels (400′ of tubing).

    By Andrew M on Mar 8, 2014

  4. Thank you very much for sharing. I also think it could be more efficient to
    allow the water to heat more time before pumping it in the tub. I have
    hooked my solar boiler to a storage tank and pump the water each hour, the
    max. temp. difference (solar boiler) is about 40 degrees Celcius. The
    capacity of the solar boiler is 6 litres approx., the storage tank about
    60. Depending on the sun, at 15.00 O’Clock the temperature of the water in
    the storage tank reaches about 45-50 degrees Celcius.

    By 321ozzy on Mar 8, 2014

  5. Hmm I see, I thought the thermostat ran the pump and would hold water in
    the hose until it got hot then shut off when it got to cooler water thus
    cycling the pump. different flow rates resulted in only different cycle
    times. With your design working so well though, I am going to replicate
    your design as closely as possible. Thanks for the info.

    By Brian James on Mar 8, 2014

  6. Amazing!!!

    By Englebert Lai on Mar 9, 2014

  7. actually, looking at it again, it’s 0.6 amps or 600 milliamps.

    By Andrew M on Mar 9, 2014

  8. Does it freeze where you live? Does the system drain down at night?

    By blurglide on Mar 9, 2014

  9. You can still find the pump on Ebay. Search for “12V water pump P-38I”:
    Rated voltage: 12V DC Rated current: 0.57A Capacity: 6.5L/Min (103GPH) Pump
    head: 2M Noise: <=55dBA/10cm Working temperature: -35C ~ +105C Service
    life: 26000 hours up Motor: DC brushless motor Pump: Centrifugal pump

    By Andrew M on Mar 9, 2014

  10. Like it man. Thanx for posting. Looks like your on to somethin’.

    By N8Dogg1002 on Mar 9, 2014

  11. Update: It’s been in the 80s for the past few days and the tub has been
    running between 104-106, with no supplemental electric heat. I have the
    thermostat set at 101, so it never turns on. Even with temps in the 70’s,
    the tub stays around 102-103.

    By Andrew M on Mar 9, 2014

  12. Excellent design, I have been researching and this is the best I have come
    across. Do you know what the flow rate is on that pump? I am going to try
    it with a 500gph bilge pump I have.

    By Brian James on Mar 9, 2014

  13. I like your heater but I live in Colorado so using water will not work with
    sub 0 temps. What do you think about running the output lines to another
    coil of .5 ABS coiled up as it comes from the hardware store set inside the
    hot tub. The system would them be closed and I could Antifreez.

    By Marvin Ferdig on Mar 9, 2014

  14. How quickly does the temp in the tub drop at night? Its a great design but
    I’m trying to find something that keeps the tub/heater off the electric
    grid even at night

    By Senkrad on Mar 9, 2014

  15. how important is the insilation on a hot tub? would something like this
    work with just any inflatible pool?

    By james0is0right on Mar 9, 2014

  16. It’d be alot easier to understand what you were saying if music wasn’t
    playing over the top of it…

    By eldeecg on Mar 9, 2014

  17. How does your pump draw 26 amps? That seems like a lot, I am new to this
    though. Great video.

    By Amyelle00 on Mar 9, 2014

  18. it would work OK with an inflatable pool. You’d be better off with a bigger
    pool solar panel for a pool though. A pool needs a lot of water raised a
    few degrees, where as a hot tub needs a little water raised to a higher
    temp. This design circulates a little water slowly, thus raising the outlet
    temp to >104. A pool solar panel might raise water a degree or two at the
    outlet, which does fine for bring a large pool from 68 to 80deg, but no
    good for a hot tub.

    By Andrew M on Mar 9, 2014

  19. try this thread: ABOUTSOLARCELLS.COMXA.COM me and my friends are happy,
    more can be found on page,we reduced budget home and now we are thinking to
    sell energy

    By Bradley Jeremy L. on Mar 9, 2014

  20. not a bad idea… what are you using for your tank?

    By Andrew M on Mar 9, 2014

  21. great setup! I need to build one as I’m getting heat from my better half on
    the electric bill. how much tubing did you use? my speakers aren’t the
    greatest.

    By alohah3 on Mar 9, 2014

  22. @bjames1200 My pump only pumps about 45gph. 500gph is probably overkill and
    will cause the water to flow too quickly through the tubing. If the water
    flows too quickly, it won’t heat up enough. I’ve had this hooked up for the
    past couple months, and the electric heater on the hot tub has only kicked
    on a handful of times. In fact, I think I need add a high temp cut-off on
    the panel intake because the tub as actually getting too hot (104-106), and
    it isn’t even summer yet!

    By Andrew M on Mar 9, 2014

  23. I think I said in the video that I used 5/8″ tubing, but it really is 1/2
    in tubing. 5/8″ would work fine, maybe even better for a large tub. I used
    a roll (from home depot). I think I used about 200′- it was only about $10
    for the tubing.

    By Andrew M on Mar 9, 2014

  24. It’s been freezing at night lately, but barely. I’m not sure it would do
    well in a hard freeze, especially the pump. It does not drain down at
    night, but if you used a larger pump you could probably work out a drain
    down system. The small pump needs to stay primed all the time, and the
    siphon effect helps move the water.

    By Andrew M on Mar 9, 2014

  25. you are correct, i know alot of people who think it is fake. Listen, i’ve
    been getting paid about $200 a week just selling energy. I took the idea
    and plan of here. you can also try it: FREEENERGYGENERATION.PIXUB.COM

    By ceasu allen on Mar 9, 2014

  26. There’s a decimal in there- 0.26 amps.

    By Andrew M on Mar 9, 2014

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