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  1. #1

    i need help experience of pond pumps, or of solar powered devices?

    Hi,
    Does anybody have any experience of pond pumps, or of solar powered devices?

    As I've finished most of the things I wanted to do on the house, I'm starting the garden from scratch this year.
    The garden includes a small pond, with a raised bed behind it. The raised bed has a waterfall feature built into it, but no working equipment.

    The pond is approx. 2.5m by 1.5m, and the top of the waterfall feature is 50-60cm above the pond water level.

    The pond is on the shady side of the garden, but there's a shed right next to it. The roof of this shed would get a lot of light.

    The shed does have power - there's a RCD on the outside of the house with a length of armoured cable running down the garden to the shed. But the shed is fairly old and not in top condition, so I'm happier with the RCD switched off when the shed is unattended.

    So I'm looking at a solar pump. The shed roof means that I could have as many panels as necessary.

    Specific questions I have...

    - In reduced light levels, does the voltage or current from a solar panel get reduced? It'd make a difference to how I wire multiple panels together.

    - Can you suggest a suitable pump and panels?

    - Maybe a battery charging mechanism to store extra charge in better light conditions?

    - Recommendations for connecting it all up? I have some electronics and soldering equipment and skills.



    If it makes any difference, the pond gets frogs in it, so nothing that'll harm them please.

    Is it possible in a budget of, say, £50?

    With the shed nearby, I can obviously house anything like the battery indoors.
    Hi,
    cung cấp bơm Tsurumi, các loại bom nuoc thai nhập khẩu từ Italy như Pentax

  2. #2
    Pump guy speedbump's Avatar
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    I don't know the exchange rate from dollars to L, but if it's anywhere near one to one, a battery would cost more than that. Solar is expensive. Solar pumps are terribly expensive. Texas Wellman has installed several solar systems for Farmers and such, maybe he can help you out. Rancher is an Electrical engineer, so he would certainly have a wealth of info for you.

    Welcome to the Forum.

  3. #3
    Quote Originally Posted by speedbump View Post
    I don't know the exchange rate from dollars to L, but if it's anywhere near one to one, a battery would cost more than that. Solar is expensive. Solar pumps are terribly expensive. Texas Wellman has installed several solar systems for Farmers and such, maybe he can help you out. Rancher is an Electrical engineer, so he would certainly have a wealth of info for you.
    Wow, thanks Bob, put me on the spot why don't you, OK Google says exchange rate is 1.31 dollars per Pound (not sterling), I had to look up a RCD, we call them GFCI (ground fault circuit interrupter). I'll answer the rest of the questions in my next post.

    Rancher

  4. #4
    Quote Originally Posted by hantrongtai1 View Post
    Hi,
    Does anybody have any experience of pond pumps, or of solar powered devices?


    Yes we all probably do.


    Quote Originally Posted by hantrongtai1 View Post
    The pond is on the shady side of the garden, but there's a shed right next to it. The roof of this shed would get a lot of light.
    That would be a good place for solar.


    Quote Originally Posted by hantrongtai1 View Post
    The shed does have power - there's a RCD on the outside of the house with a length of armoured cable running down the garden to the shed. But the shed is fairly old and not in top condition, so I'm happier with the RCD switched off when the shed is unattended.
    OK you have power, so any responsible solar installer would tell you that Solar will never be cheaper than your current supplier of power, I mean you can do it but it requires maintenance, and constant monitoring. You have a shed that you want to put the Solar Panels on, but it's so old that you turn off the power to it via the RCD, think about that for a moment.

    Quote Originally Posted by hantrongtai1 View Post
    So I'm looking at a solar pump. The shed roof means that I could have as many panels as necessary.
    Well not exactly, my panels cover my 2,000 sq ft' garage...


    Quote Originally Posted by hantrongtai1 View Post
    - In reduced light levels, does the voltage or current from a solar panel get reduced?


    Yes solar panels work by converting photons to electrons, so the current will decrease, the voltage of the solar panels is dependent on the band gap of the silicon material, typically .5 volts, less sun means less current (Amps) at how ever many volts the panels are configured for.

    Quote Originally Posted by hantrongtai1 View Post
    - Can you suggest a suitable pump and panels?
    Grundfos for solar pumps, not sure if they make a pond pump or not.


    Quote Originally Posted by hantrongtai1 View Post
    - Maybe a battery charging mechanism to store extra charge in better light conditions?
    Quote Originally Posted by hantrongtai1 View Post
    - Recommendations for connecting it all up? I have some electronics and soldering equipment and skills.


    I recommend you talk to solar experts at: Northern Arizona Wind & Sun Northern Arizona Wind & Sun Solar Forum


    Quote Originally Posted by hantrongtai1 View Post
    Is it possible in a budget of, say, £50?
    No, maybe 10-25 times that amount. But you didn't say how much water you want the pump to deliver, so if you want a hobby pump with a 1 meter square panel, maybe 50 pounds.

    Rancher

  5. #5
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    Rancher got it right. Just use grid power and be done with it.

    Quote Originally Posted by Rancher View Post


    Yes we all probably do.




    That would be a good place for solar.




    OK you have power, so any responsible solar installer would tell you that Solar will never be cheaper than your current supplier of power, I mean you can do it but it requires maintenance, and constant monitoring. You have a shed that you want to put the Solar Panels on, but it's so old that you turn off the power to it via the RCD, think about that for a moment.



    Well not exactly, my panels cover my 2,000 sq ft' garage...




    Yes solar panels work by converting photons to electrons, so the current will decrease, the voltage of the solar panels is dependent on the band gap of the silicon material, typically .5 volts, less sun means less current (Amps) at how ever many volts the panels are configured for.



    Grundfos for solar pumps, not sure if they make a pond pump or not.




    I recommend you talk to solar experts at: Northern Arizona Wind & Sun Northern Arizona Wind & Sun Solar Forum


    [COLOR=#141414][FONT=Verdana]

    No, maybe 10-25 times that amount. But you didn't say how much water you want the pump to deliver, so if you want a hobby pump with a 1 meter square panel, maybe 50 pounds.

    Rancher

  6. #6
    Pump guy speedbump's Avatar
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    OK you have power, so any responsible solar installer would tell you that Solar will never be cheaper than your current supplier of power
    Installer... probably, but salesman, never.

  7. #7

    Solar pump

    The followings may do something:

    - In reduced light levels, does the voltage or current from a solar panel get reduced? It'd make a difference to how I wire multiple panels together.
    Absolutely, it'll be. And the layout of panels is subject to the voltage required by inveter.

    - Can you suggest a suitable pump and panels?
    Have to get details: the lift, required water output.

    If it makes any difference, the pond gets frogs in it, so nothing that'll harm them please.
    Frogs will take system output power down.

  8. #8
    just Google "solar pond pump". There's lots of options relatively inexpensive...

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