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  1. S

    Grundfos SQ submersible internal switch problem

    Thank you so much for your responses. I feel like an idiot, but I made a wiring mistake and the pump was not getting any voltage (even though I was measuring 240V at the output of the pressure switch). Long story. The mistake itself was understandable but I feel idiotic for not diagnosing it...
  2. S

    Grundfos SQ submersible internal switch problem

    Hello, Background: I am off-grid and running off an inverter (Magnum MS4448PAE) and batteries. For decades we've run "off-the-shelf" 240V pumps directly off the generator but over the years we've gradually upgraded the solar electrical system and finally this weekend I was ready to switch to a...
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