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  • DC deep well pumps

    What is a good brand of DC well pump? I neep to pump water out of a 150 ft deep well and want to use a solar set up with a dc pump.

  • #2
    Sorta Deep Well Pump

    Well, here in the upper desert of AZ. we average about 320' deep up to about 1500 ft. So what do we use ? We all pretty much use 220 single phase AC well pumps. Even on solar , they are not so bad. Most of my neighbors all just fire up the generators, pump for about an hour into a top side holding tank and then from there a small house pressure system does the trick. In fact a shur-flo pump with a 2 liter bladder tank and you have hot showers or any other water needed. If you wish to run the deep well pump on solar, you will need to go one of two ways, either two sine wave inverters with a com strip to enable 220 or a 220 step up tranformer , which will do the same thing.

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    • #3
      Grunfos makes some DC pumps, but the pump and it's controller are as expensive as a PV, battery, inverter setup to run a generic AC pump.

      The most important thing is to properly size the pump, the combo of Motor & pump stages is critical to get the best performance per watt. And a 240V, 3 wire pump is easier for an inverter to start than the same pump in a 2 wire configuraton.

      Mike "been there, done that" B.
      Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
      || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
      || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

      solar: http://tinyurl.com/LMR-Solar
      gen: http://tinyurl.com/LMR-Lister

      Comment


      • #4
        DC well pump

        I think i want to go with a dc pump because it will be filling a water trough for cattle to drink out of and i don

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        • #5
          AC or DC cooks beef just fine - watts are watts.

          Billions of houses in the states have deep well pumps that run on 240V utility power, and seldom, if any reports of getting shocked by water. Of course, the DC pumps may cost 2 or 3 times what an AC pump costs. And if it needs repair, Billy Bob at the Pump Shack is not likely to have any parts for it. And for safety, I don't trust the Chi Com products.
          Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
          || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
          || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

          solar: http://tinyurl.com/LMR-Solar
          gen: http://tinyurl.com/LMR-Lister

          Comment


          • #6
            DC well pump

            Well as far as safety i just went and fixed an ac pump that was not properly grounded and it killed a horse and two cows so im not sure which way to go with this deal. I agree with the staying away from chinese products i have never had any luck with anything made in china.

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            • #7
              Originally posted by waceycornia View Post
              Well as far as safety i just went and fixed an ac pump that was not properly grounded and it killed a horse and two cows....
              That's a bummer. Sorry about that. Properly grounded is the operative word, DC pumps need to be grounded too, same as AC.
              Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
              || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
              || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

              solar: http://tinyurl.com/LMR-Solar
              gen: http://tinyurl.com/LMR-Lister

              Comment


              • #8
                Aloha


                just new to this forum...due to last week's debacle.

                I saved and executed the drilling of a well on my land. Apparently all the well diggers jobs are large, municipal and on grid...thus the 220v that now hangs 265' down. I am off grid with a system that is just fitted to my home, barely. I am searching for the best dc pump/panel combo to replace the unusable pump & stand alone. Does anybody run such a system that could also be supplemented with 110v Honda EU 3000 gennie?

                Water, water everywhere. ..but not a drop to drink

                Thank you...I hope this is a simple solve!

                Comment


                • #9
                  Some questions first. The well is 265' What is the water level you will be pumping from ? How many GPM do you need ? There are some 1/3 hp AC pumps that may have enough head for 1GPM
                  It takes energy to lift water, so if you can use solar to pump to a ground level cistern with a Grundfos SQ flex http://us.grundfos.com/products/find...ct/sqflex.html
                  But they are not cheap.
                  Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
                  || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
                  || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

                  solar: http://tinyurl.com/LMR-Solar
                  gen: http://tinyurl.com/LMR-Lister

                  Comment


                  • #10
                    If an AC pump draws 375watt according to the sticker on the pump, can i run (startup) this pump with a 1200watt inverter.

                    Comment


                    • #11
                      Originally posted by fivewin View Post
                      If an AC pump draws 375watt according to the sticker on the pump, can i run (startup) this pump with a 1200watt inverter.
                      assume starting current is 10x running current. 3,750 watts for 2 seconds to start. Can a 1,200w inverter provide a surge of 3750 watts for a second or so ?
                      Doubtful, even if it's a 24V inverter. You can call the pump mfg and see what they spec the starting amps at, or what the Locked Rotor Amps are.
                      here's a chart, see if you can work it backwards to see what your starting watts would be

                      Well Pump Motor Specs.jpg
                      Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
                      || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
                      || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

                      solar: http://tinyurl.com/LMR-Solar
                      gen: http://tinyurl.com/LMR-Lister

                      Comment


                      • #12
                        That guy lost his manual. So i only see the sticker.

                        But wow, to be on the save side you must have at least 4000 pure sinewave inverter. Lets see if my friend is willing to check his bank ac hehehe

                        He wants to go offgrid

                        Comment


                        • #13
                          Some pumps only take 5x running power to start. Research the pump, download a copy of the manual, and DESIGN a system. Or just throw parts at it, and maybe it will work.
                          Hey, the bridge didn't fall down, so let the school bus over it.
                          Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
                          || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
                          || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

                          solar: http://tinyurl.com/LMR-Solar
                          gen: http://tinyurl.com/LMR-Lister

                          Comment


                          • #14
                            That's very interesting. I have a karcher bp4 pumping from 55-60 feet. The one way valve is fitted 5 feet above the pump so the line remains under pressure but alows the pump to start and free spin before the pressure hits the valve again. It came with a one way valve built in and took it out as the pump will lock up. By moving it up the line 5-6 feet alows the pump to start without a load.
                            This pump is 750w and is fed by a victron 1200va-1000w inverter that services my garage, where I have a freezer as well. Never had a overload alarm ever.

                            Comment


                            • #15
                              What do mean "start without a load"? Is it not so that when the ac pump starts the starting current is (much)more.

                              Or is it a dc (brushless) pump with an adaptor?

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