Well pump question

wellbuilt
wellbuilt Solar Expert Posts: 763 ✭✭✭✭
in Off Grid Solar & Battery Systems #1
 Hi all ,  ok I just sunk my grundfos SQF 6 / 3 680’ in to the ground , the wire is 10g pump cable 730’ 
  There are a few things I’m trying to wrap my head around . 
  The first thing is I’m popping my 20 amp breaker in my panel when I turn the pump on ? 
    I have a GFCI breaker , is there a reason this pump won’t run on a GFCI Circuit ?  
 It’s running on a 5000watt champion generator just fine with little load . 
 I added a regular 20 amp breaker and it’s seams to work good ? 
  
    When the pump starts i can see the soft start , the pump starts pumping at 200watts then the watts go up slowly to 700 watts , after 20 mins I’m seeing 800 watts  , 20 min more and I seeing 900 watts then 1000 watts 
 the pump max power is 1400 watts . 
 The question ,
    are the watts going up because the water level is dropping in the well ? Or is some thing heating up? 
 I’m getting 5 gallons a minute and ran  60mins so300 gallons a hour +- 
 the wattage started going up slowly and stoped at 1000 watts ? 
  The max watts the pump will use is 1400 watts why dose it start at 800 ? Thanks for the reply .
  
  
Out back  flex power one  with out back 3648 inverter fm80 charge controler  flex net  mate 16 gc215 battery’s 4425 Watts solar .
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Comments

  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #2
    to me ( not code ) I could expect a deep well pump to have some electrical leakage, and would expect it to trip a GFCI.

    Is this a 240V AC pump?  2 wire or 3 wire ?
    Powerfab top of pole PV mount | 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 ||
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  • wellbuilt
    wellbuilt Solar Expert Posts: 763 ✭✭✭✭
    #3
    Hi mike ,
    It’s a sqf solar pump , runs on any power .
     2 wire plus ground .
    I may run it on solar at some point , but for now i have it running on my inverter .
    120volt 20 amp breaker just a wall outlet .
    Out back  flex power one  with out back 3648 inverter fm80 charge controler  flex net  mate 16 gc215 battery’s 4425 Watts solar .
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  • BB.
    BB. Super Moderators, Administrators Posts: 33,590 admin
    #4
    Many (some/most/almost all?) VFDs (variable frequency drives--Typically a wide variaty of input voltage/AC/DC/battery/solar panels--And usually 3 phase variable frequency output) are "square wave" AC inverters... Those typically have a lot of noise (and higher frequency harmonics) vs PSW/TSW type inverters (VFDs are inverters)--Which some brands/models of standard GFI outlets have been known to "false trip" on MSW/SW type inverter outputs...

    What the AC input current looks like on the SQF looks like--Don't know--But if you do have "trips" on a genset GFI--I would try running the pump without the GFI and see what happens.

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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  • wellbuilt
    wellbuilt Solar Expert Posts: 763 ✭✭✭✭
    #5
      The pump is tripping running off my house panel that has GFCI breakers from a out back inverter .
      I just read that the pump can’t be used on a gfci Circuit  I thought gfi would be ok . 
     It runs off my generator . 
     And I put a regular breaker in and it works. 
     Its pumping 5 gallons a min @800 watts  
      After I run the pump for a hour I’m still getting 5 gallons a minute but using 1000watts 
        
     Question 
     is the pump using more power because the water level is lower in the well ? 
      It Max’s out at 1400 watts .  Thoughts ?
    Out back  flex power one  with out back 3648 inverter fm80 charge controler  flex net  mate 16 gc215 battery’s 4425 Watts solar .
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