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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

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Renewable Energy: Solar Pump for Irrigation

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    • CommentAuthorPaul_B
    • CommentTimeApr 9th 2007 edited
     
    I am hoping someone may have some experience in this area. I have a 650l water "butt" (will possibly add another 300l butts in the future) and would like to use this for watering the garden. I have bought some leaky hose as a more efficient and deeper method of watering the plants and shrubs. Now the leaky hose seems to suggest an optimum pressure of 1.5bar which is 15m head of water. The water butt can't generate this pressure from gravity so I need a pump.

    I would like to use a solar panel to generate the electricity to run the system. So I am guessing I need some batteries to store the energy over a few days and then run the leaky hose from a low voltage pump to water the garden. From what I have read I would need deep cycle batteries to allow a greater discharge than a normal car battery.

    Any advice would be greatly appreciated.

    Paul
    • CommentAuthorGuest
    • CommentTimeApr 9th 2007
     
    I would personaly "adjust" the hole sizes and perhaps use more 1/2" garden hose (to reduce the water flow resistance) before going down the solar panel/charger/battery/pump/timer route. The only proviso is that your water butt must be higher then the highest outlet. it just means it will take longer to supply any given quantity of water. If you go to an engineers supplier you can get drills in ANY size from .3mm - > 2" ! poke a pin/needle /nail down you existing nozzle untill you can gauge what size it is, i.e. "just a Gnats bigger then this nail", I would then go for some thing about twice its diameter, but the nice young man in the engineers shop will sort it out for you.
    frank

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