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Grundfos 15-58 Inrush Current?

nmsolarken Member Posts: 6

Can anyone tell me the inrush current to expect from a Grundfos 15-58 circulator?  I am currently using 6 x 87 watts or about 540 watts inrush but I'm wondering if anyone has more accurate information.  I have not been able to find this in any of Grundfos' documents.



  • nmsolarken
    nmsolarken Member Posts: 6
    0 inrush problem with electronic start motors

    Looks like I stumped the folks here.  I finally got ahold of Grundfos and they have told me that because the three speed motors have electronic motor speed control these pumps do not have an inrush 'problem' - or that they will only draw their max rated current (which is .75 amp on high speed).

    Probably not many folks that need this but thought I would answer the question in case anyone was curious.
  • lchmb
    lchmb Member Posts: 2,997

    what  would you need this info for?
  • nmsolarken
    nmsolarken Member Posts: 6
    UPS capacity

    I needed the information to be able to size a UPS that I use to power my solar thermal system - I need to ensure the max draw from the system would not exceed the ups' capacity
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