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Thread: **Urgent Help Required** Solar Irrigation System

  1. #1
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    Default **Urgent Help Required** Solar Irrigation System

    Hi

    We are looking to purchase a system for Solar Irrigation system

    Operate a 5hp Water irrigation Pump with a 5" inlet from well to a 4" outlet.

    What Wattage is require to start the Motor (i think 6kw) and running wattage of 3.5-4kw.

    We require the system to be a three phase, 220v if possible

    No batteries are required.

    Can you please advise me what Ampage, and equipment is required as i am working blind as it

  2. #2
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    To start with how many gallons of water per day would be required? I would imagine a lot considering your pump size.
    What is the irrigation system to consist of meaning high pressure sprinkler heads or just ditch type irrigation?
    Where is the project located?
    How deep is the well?
    Is grid power available?
    Rich
    WWW.solarsaves.net

    NABCEP certified Technical Sales Professional

    http://www.solarpaneltalk.com/showth...Battery-Design

    http://www.calculator.net/voltage-drop-calculator.html (Voltage drop Calculator among others)

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  3. #3
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    Hi

    Appreciate the message.

    Im working blind here, im guessing the well would be 150ft down and will be a ditch type Irrigation.

    We are looking to run the system on Solar Energy.

    The Systm is to be installed in India.

    Ive spoken to a coupel of people and they are mentioning three phase, with 7000w solar panel power backed up with a Inverter but no batteries involved.

    System to run 9-12 hours a day during sunlight

    Thank You.

  4. #4
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    There is no such thing as a 3 phase, direct solar pump inverter gadget.

    The simplest you can do is a Grid Tie, to let the solar generation offset your cost of grid power.

    There are some small ( less that 1hp pumps ) that can run off DC & PV, but they don't meet your needs.
    Since the dawn of time it has been mankind's dream to blot out the sun.
    Montgomery Burns

    "Always listen to experts. They'll tell you what can't be done and why. Then do it."

    spreadsheet based voltage drop calculator:
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  5. #5
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    Thank You.

    Im working Blind, any suggestions would be great.

    Basically, im trying to put together a system that would do the following:

    http://www.youtube.com/watch?v=UWktwJh5p4w

  6. #6
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    To run 9-12 hours a day will most likely require a tracking system for the collectors and enough wattage to compensate for the lower insolation values at the beginning and end of the day.

    How much land are you trying to irrigate and how much of the land will be irrigated each day?

    A simpler and less costly solution would be a Grundfos DC pump.
    There is one that will pump 24GPM at 150 feet deep. I don't know if that is enough to work with however.
    Rich
    WWW.solarsaves.net

    NABCEP certified Technical Sales Professional

    http://www.solarpaneltalk.com/showth...Battery-Design

    http://www.calculator.net/voltage-drop-calculator.html (Voltage drop Calculator among others)

    www.gaisma.com

  7. #7
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    Quote Originally Posted by DrSuleman View Post
    Operate a 5hp Water irrigation Pump with a 5" inlet from well to a 4" outlet.
    Lets' be honest and Politically Incorrect.

    You are crazy thinking this is a solar project. Get a grip on reality.
    MSEE, PE

  8. #8
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    Quote Originally Posted by DrSuleman View Post
    We are looking to purchase a system for Solar Irrigation system

    Operate a 5hp Water irrigation Pump with a 5" inlet from well to a 4" outlet.

    What Wattage is require to start the Motor (i think 6kw) and running wattage of 3.5-4kw.
    You need batteries. You can't support surge loads without them.

    Assuming $10/watt for a battery backed system + tracker you are looking at a $50,000 system. (5kW STC DC.) And a few thousand every 5 years or so for battery bank replacement. Is that within your price range?

  9. #9
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    Quote Originally Posted by DrSuleman View Post
    Hi

    We are looking to purchase a system for Solar Irrigation system

    Operate a 5hp Water irrigation Pump with a 5" inlet from well to a 4" outlet.

    What Wattage is require to start the Motor (i think 6kw) and running wattage of 3.5-4kw.

    We require the system to be a three phase, 220v if possible

    No batteries are required.

    Can you please advise me what Ampage, and equipment is required as i am working blind as it’s a Free Project that i am building for my Father as a Gift, and Solar irrigation is his dream for the people of the village that he comes from.
    Hi Dr Suleman,
    Please give me some details before i can do your analysis. What is your Voltage(220 i guess)?? What is your ampage use?? The power factor( will be written on your pump), the efficiency of your pump ( given by your Pump Company). The formula is (Square root of 3)*(VOLTAGE)*(Ampage)* (Power Factor) * (Device Efficiency) / 746.
    Last edited by Jason; 05-01-2012 at 01:06 PM. Reason: Please don't put your email addresses on posts.

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