off grid water pumping Grundfos SQE

toothytoothy Registered Users Posts: 29 ✭✭✭
Hello all

I have an off grid system and a Grundfos SQE15.

Do any of you know if I would use less power by getting rid of the 301 control box and constant pressure feature, and going with a standard pressure switch and large bladder tank?

I'm not worried about a small amount of power but a substantial savings would be worth doing. I have never had a constant pressure system and it seems like a nice feature.

Thanks in advance


  • System2System2 Posts: 6,290 admin
    Re: off grid water pumping Grundfos SQE

    The electronic Controller box would use next to nothing power compared to the amps used by the pump.
  • westbranchwestbranch Solar Expert Posts: 5,183 ✭✭✭✭
    Re: off grid water pumping Grundfos SQE

    Toothy, a more complete description of your system is needed...

    You need to compare the constant draw against the periodic draw ... start / stop mose of a conventional pressure tank system.
    difficulty is in determining how many times a day you start stop, size of pressure tank etc..:confused:

    give us more details to help analyze...

    KID #51B  4s 140W to 24V 900Ah C&D AGM
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    West Chilcotin, BC, Canada
  • dwhdwh Solar Expert Posts: 1,341 ✭✭✭
    Re: off grid water pumping Grundfos SQE

    Toothy's original post was from April... :D
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