Wasif: 12 volt 3/4 HP Ejector Pump on Solar

This discussion was created from comments split from: Connect 12 volt panels to 24 volt system.


  • wasifwasif Registered Users Posts: 1

    I have 12 volt DC motor 3/4 HP and want to run a ejector pump where 3/4 HP AC motor was attached.

    My requirement is to run the pump within range of 2000 to 2800 RPM because my earlier motor was of 2850 RPM .

    How many Panels will be required. I want to use system only at sunny times.

    Pls advis is 24 volt system will be better or 12 volt system

  • BB.BB. Super Moderators, Administrators Posts: 32,088 admin

    I moved your post to its own discussion.. Should be easier to keep track of your needs.

    Do you have a link to the DC pump motor? Is there any type of electronics going to be used to control the motor?

    No other loads on this system?

    You want to use solar panels only to power the pump--No battery bank at all?

    Is this a brush (universal type motor)?

    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • mike95490mike95490 Solar Expert Posts: 9,393 ✭✭✭✭✭
    You will need a beefy relay/contactor to energize the pump,  maybe a SSR can work
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