Become a TFP Supporter Pool Math Forum Rules Pool School
Page 1 of 2 12 LastLast
Results 1 to 20 of 22

Thread: Solar heating pump questions

  1. Back To Top    #1

    In the Industry

    Join Date
    Apr 2017
    Location
    Maine
    Posts
    231

    Solar heating pump questions

    I hope this isn't a hijack but here is my question.

    i have a 1 hp superpump that runs 10 hours a day, it's basically on at the same time that my Hayward solar controller opens the valve to my 350 sq ft of panels.

    My question is this, will converting to a vs pump save me money and or will the speed need to be bumped up so much that the gain on lower speeds is basically nil? My pressure on filter is 17 psi when panels are off and goes to 22 when the controller opens the valve. Can my solar controller also control my pump speed? My rate is only around 10 cents per kw I believe.

  2. Back To Top    #2
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    24,974

    Re: optimal time to run pool solar heater

    It is a bit of a hijack but, I'll answer it.

    Your 1hp pump uses at least 1000 watts, maybe up to 1400 watts. My 3hp Intelliflo pump uses 150 watts 1100 rpm on solar standby. And it uses 550 watts at 1950 rpm or 620 watts at 2000 rpm running solar. The number are similar for a 1-1/2 hp Superflo VS pump. So, you will definitely save money. At 10.25c/kWh I can run my pump at 1100 rpm 24x7 for less than 12 bucks per month.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  3. Back To Top    #3

    Join Date
    Aug 2016
    Location
    Riverside, CA
    Posts
    378

    Re: optimal time to run pool solar heater

    Trying not to derail further but @Chemnut don't forget to look into Utility rebates on VS Pumps and also rebates being offered by both Pentair and Hayward right now too. Anything further should be posed in a separate thread though.


  4. Back To Top    #4

    In the Industry

    Join Date
    Apr 2017
    Location
    Maine
    Posts
    231

    Re: optimal time to run pool solar heater

    Quote Originally Posted by pooldv View Post
    It is a bit of a hijack but, I'll answer it.

    Your 1hp pump uses at least 1000 watts, maybe up to 1400 watts. My 3hp Intelliflo pump uses 150 watts 1100 rpm on solar standby. And it uses 550 watts at 1950 rpm or 620 watts at 2000 rpm running solar. The number are similar for a 1-1/2 hp Superflo VS pump. So, you will definitely save money. At 10.25c/kWh I can run my pump at 1100 rpm 24x7 for less than 12 bucks per month.
    Sorry for the partial hi jack. You think 1100 rpm will give me the water flow needed for panels? Can my Hayward solar controller control a 115v VS pump? My pad is wired 115. Do 115v VS pumps offer the same savings? Is there a graph that shows gallons per minute on certain speeds?

  5. Back To Top    #5
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    24,974

    Re: Solar heating pump questions

    No, my pump runs on standby at 1100 rpm. The solar controller ramps the pump speed up to 2000 rpm for solar and opens the solar valve.

    Yes, the GL-235 can ramp the pump speed for a 2 speed pump or for a 1-1/2hp VS pump like the Pentair Superflo, which runs on 115 or 220, by using a relay to switch the pump to speed two, using thee optional comm cable. Yes, the Pentair Superflo VS pump, 342001, offer similar savings, not quite as good as the Intelliflo but still very good. Also, very quiet.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  6. Back To Top    #6

    In the Industry

    Join Date
    Apr 2017
    Location
    Maine
    Posts
    231

    Re: Solar heating pump questions

    Wow, ok you have my attention now.

    coukd you detail how I go about doing this?

  7. Back To Top    #7

    Brentr's Avatar
    Join Date
    Oct 2009
    Location
    Jacksonville, FL
    Posts
    2,419

    Re: Solar heating pump questions

    Chemnut I am going to follow this thread as I have been looking for detailed instructions. I have a similar set up. Can you put your pool and equipment specs and info in your signature bar?
    6,000 gal, IG free form,Beach Series Antigua by Marbletite Pebble finish,Sheer Descent, IG Fountain, Dolphin / Mermaid Statues,Dura- Glas 1.5hp pump,Hayward Pro-grid DE4820, Aqua Rite SWG with T-Cell 15,Heat Siphon Heat Pump DX 5.0 109,000 btu, Pool Cage, 1800sq ft Tremron Estate Pavers,Aquatherm Ecosun Solar Panels 192 sq ft with GL-235 Controller,Pentair IntelliBrite, Apollo Magnetic Stirrer Our New Poolbuild, Jacksonville, FL yr 2009 Solar install Outdoor kitchen upgrade

  8. Back To Top    #8
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    24,974

    Re: Solar heating pump questions

    Yes, add your pool info to your signature as shown here, Pool School - Read This BEFORE You Post

    Both of you would benefit significantly by using the Pentair 342001, 1-1/2 hp VS pump with the optional comm cable and use a relay in the GL-235 to change pump speed when solar heat is available. It also has a built in timer that will turn the pump on and off at various times/speeds. You could run at 1100 or 1200 rpm for skimming, filtering and solar standby which would use 150-170 watts of electricity. Then the solar controller would open the solar valve and ramp the pump to speed 2 which would likely be somewhere around 2000 rpm and use 600-800 watts. Which would be a lot less energy than what your current pumps use. The Pentair Superflo VS pump operates on 110v or 220v.

    Hayward also makes a smaller VS pump called the Maxflo VS that has a built in timer and operates on 110v or 220v. It would also likely be a good option. I am just not as familiar with Hayward pumps because I own Pentair equipment. It would be worth a call to Hayward to discuss the options for using the Maxflo VS with the GL-235 solar controller. Inyo Pools could probably also help with this question.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  9. Back To Top    #9

    In the Industry

    Join Date
    Apr 2017
    Location
    Maine
    Posts
    231

    Re: Solar heating pump questions

    I notice the pentair superflo is 1.5 hp, where the superpump vs is only .85 and the max flo vs is 1 hp. I believe I will need that extra hp to get the water flow needed to get my solar working properly? When my solar is on, the flow from the returns is reduced in half when compared to when it's off. Does that make sense or should I set the actuated valve more open to let more water into the pool?

  10. Back To Top    #10

    Brentr's Avatar
    Join Date
    Oct 2009
    Location
    Jacksonville, FL
    Posts
    2,419

    Re: Solar heating pump questions

    Chemnut when my solar is on all the water is diverted to the solar panels. The flow in my returns seem to be the same. My filter psi goes from 13psi to 19 psi. Hope this helps
    6,000 gal, IG free form,Beach Series Antigua by Marbletite Pebble finish,Sheer Descent, IG Fountain, Dolphin / Mermaid Statues,Dura- Glas 1.5hp pump,Hayward Pro-grid DE4820, Aqua Rite SWG with T-Cell 15,Heat Siphon Heat Pump DX 5.0 109,000 btu, Pool Cage, 1800sq ft Tremron Estate Pavers,Aquatherm Ecosun Solar Panels 192 sq ft with GL-235 Controller,Pentair IntelliBrite, Apollo Magnetic Stirrer Our New Poolbuild, Jacksonville, FL yr 2009 Solar install Outdoor kitchen upgrade

  11. Back To Top    #11
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    24,974

    Re: Solar heating pump questions

    I believe the Maxflo VS is also available in 1.65 hp. All water flow is diverted to my solar panels also. If you can get to the panels on a sunny day feel the panels to see if they are warm or cool. You want the panels to be not too hot and you want the water returning to the pool to be not too warm. It is good to have a little more pump than you need like the Superflo VS so that you can adjust the water flow as high as you need to.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  12. Back To Top    #12
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,987

    Re: Solar heating pump questions

    Quote Originally Posted by Chemnut View Post
    I notice the pentair superflo is 1.5 hp, where the superpump vs is only .85 and the max flo vs is 1 hp. I believe I will need that extra hp to get the water flow needed to get my solar working properly? When my solar is on, the flow from the returns is reduced in half when compared to when it's off. Does that make sense or should I set the actuated valve more open to let more water into the pool?
    For years, I ran my solar on a two story roof 25' in the air with a 1/2 HP pump. So you don't need a huge pump to run solar. Just make sure the max head of the pump is at least 65' or the head at 40 GPM is twice the height of the panels. This will ensure the pump "size" is sufficient for solar. But nearly every pump on the market today is capable of solar. There are only handful that I would not recommend but most are AG pumps.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    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

  13. Back To Top    #13

    In the Industry

    Join Date
    Apr 2017
    Location
    Maine
    Posts
    231

    Re: Solar heating pump questions

    Unfortunately the maxflo requires 230v. I am interested in going to a variable speed pump but not if I have to get my pool house wired for 230. Them thar electricians are expensive boys plus I don't think my panel has room.

  14. Back To Top    #14

    In the Industry

    Join Date
    Apr 2017
    Location
    Maine
    Posts
    231

    Re: Solar heating pump questions

    I guess I'm being stubborn, I love my super pumps basket, my neighbor has a pentair and it's a wrestling match every time he needs to remove the lid. I'm leaning towards the superpump vs but concerned it's only .85 hp. My pools all plumbed with 1.5" pipe, the tun to the solar is 60' with a vertical rise of 14'. My panels are always cool to the touch, do you think I have the flow rate to big and should reduce the amount of water to them? Do you know what the minimum flow rate is for a flow switch on a aquarite?

  15. Back To Top    #15
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,987

    Re: Solar heating pump questions

    I'm leaning towards the superpump vs but concerned it's only .85 hp.
    There are several other SuperPump VSs.

    SuperPump SP2600VSP Hayward 1.5 THP
    SuperPump SP2600VSP2 Hayward 1.5 THP
    SuperPump SP2602VSP Hayward 1.5 THP
    SuperPump SP2603VSP Hayward 1.65 THP

    Do you know what the minimum flow rate is for a flow switch on a aquarite?
    15 GPM. Far less than what solar will require.

    My panels are always cool to the touch
    That is a good thing. Means high efficiency.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    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

  16. Back To Top    #16

    Brentr's Avatar
    Join Date
    Oct 2009
    Location
    Jacksonville, FL
    Posts
    2,419

    Re: Solar heating pump questions

    My temp difference is between 2 to 3 degrees difference for input and output. Do you have a temp on your swg?


    6,000 gal, IG free form,Beach Series Antigua by Marbletite Pebble finish,Sheer Descent, IG Fountain, Dolphin / Mermaid Statues,Dura- Glas 1.5hp pump,Hayward Pro-grid DE4820, Aqua Rite SWG with T-Cell 15,Heat Siphon Heat Pump DX 5.0 109,000 btu, Pool Cage, 1800sq ft Tremron Estate Pavers,Aquatherm Ecosun Solar Panels 192 sq ft with GL-235 Controller,Pentair IntelliBrite, Apollo Magnetic Stirrer Our New Poolbuild, Jacksonville, FL yr 2009 Solar install Outdoor kitchen upgrade

  17. Back To Top    #17

    In the Industry

    Join Date
    Apr 2017
    Location
    Maine
    Posts
    231

    Re: Solar heating pump questions

    Mas985, I believe the only 115v is the .85 hp.

    brentr, most times the returning water is 2-3 degrees hotter. On a nice June day, because of my panels all facing true south and I would guess a 30 degree incline, I have seen my pool go from 72 to 84. Seriously lol. As the season progresses and the sun gets higher, my efficiency drops big time. Late August I am lucky to get a 4 degree bump.

  18. Back To Top    #18
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,987

    Re: Solar heating pump questions

    My pools all plumbed with 1.5" pipe, the tun to the solar is 60' with a vertical rise of 14'.
    With only a 14' rise, the SP26115VSP should work fine. At higher head, they allow the pump to ramp up to 3450 RPM which helps with high head low flow rates so it should be able to prime the panels just fine.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    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

  19. Back To Top    #19

    In the Industry

    Join Date
    Apr 2017
    Location
    Maine
    Posts
    231

    Re: Solar heating pump questions

    Can anyone explain the procedure and parts needed for my Hayward gl-23405 solar controller to also control my pump? Bare in mind this is also hooked up 115v. I am unsure of the definition of a relay?

  20. Back To Top    #20
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,987

    Re: Solar heating pump questions

    It shows how to hook up the pump in the manual? https://www.hayward-pool.com/pdf/man...olarGL-235.pdf

    Or were you asking if the controller can control speeds?

    A relay is basically and electronically controlled switch.

    I would hook up the controller to be independent from the pump (i.e pump is always powered). You can then use the solar valve voltage control to change the speed of the VS pump. The pump would use the internal timers and speed controls when solar is not in demand. When solar turns on, the voltage across the valve actuator control can be used to switch the VS pump speed to a speed set for solar. See page 16 of the pump manual.

    http://www.hayward-pool.com/pdf/manu...-S26115VSP.pdf
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    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

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •