Pump remove little water

yobi
yobi Registered Users, Users Awaiting Email Confirmation Posts: 1 ✭
in Solar Information links & sources, event announcements #1
I have 3panel 270w each a 2 wired motor with 300w,36v,9A when i connect in parallel the voltage is 29v when loaded what is the problem
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  • BB.
    BB. Super Moderators, Administrators Posts: 33,740 admin
    #2
    What pump do you have (brand/model, both electrical and water pumping specifications)?

    How deep is the well/water source?

    What is the output (pumping to cistern? Pumping to pressurized plumbing?).

    Have you measured the current and voltage from the solar array to the pump (DC Current Clamp Meter, voltage meter, etc.)?

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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  • littleharbor2
    littleharbor2 Solar Expert Posts: 2,196 ✭✭✭✭✭
    #3
    That voltage sounds about normal for Those particular type of panels I presume they are 60 cell panels In parallel If you want her voltage you have to series wire them

    2.1 Kw Suntech 175 mono, Classic 200, Trace SW 4024 ( 15 years old  but brand new out of sealed factory box Jan. 2015), Bogart Tri-metric,  460 Ah. 24 volt LiFePo4 battery bank. Plenty of Baja Sea of Cortez sunshine.

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  • Sagtonsolar
    Sagtonsolar Registered Users, Users Awaiting Email Confirmation Posts: 1 ✭
    edited May 16 #4

    Interesting setup. The voltage drop under load may be due to startup current demand or panel configuration mismatch. Proper MPPT sizing and wiring checks can help improve performance. Thanks for sharing this useful discussion.

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