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Thread: Wind energy

  1. #1
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    Default Wind energy

    Are there manufacturers/installers of home wind energy systems I can contact?

    Is wind energy a viable option Vs solar?

    (in PE we do get the occasional breeze)

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    Default Re: Wind energy

    Many options available.
    But I would use it as a top-up with solar only.
    https://www.kestrelwind.co.za/renewa...BoCyKwQAvD_BwE
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    Default Re: Wind energy

    Surely PE is awash with wind turbines :-)
    Last time I looked, it seemed that wind turbine cost is about 4x that of solar panel per kWh.
    My (hopefully) future installation on the West Coast will have a small 1kWh wind turbine to top up the batteries overnight (every night at the West Coast).

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    Default Re: Wind energy

    Wind alone isn't viable at all.
    To use with your solar as a top up during the night for example is of course possible, but not as effective on a small scale as you might think even if living at the coast.
    Basically it's a nice to have, nice to get that little extra IF the wind blow, but ja at the cost...

    For that money R30, R40, R50k last I checked for 1 kW, I'll much rather get myself a extra 5 kW of PV and a extra 5 kW of batteries.
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    Default Re: Wind energy

    Quote Originally Posted by bigboy529 View Post
    Wind alone isn't viable at all.
    To use with your solar as a top up during the night for example is of course possible, but not as effective on a small scale as you might think even if living at the coast.
    Basically it's a nice to have, nice to get that little extra IF the wind blow, but ja at the cost...

    For that money R30, R40, R50k last I checked for 1 kW, I'll much rather get myself a extra 5 kW of PV and a extra 5 kW of batteries.
    The Tesup Zeus 3kw unit being 3ph AC sells for R20 000. It does seem from your prices that prices have come down quite a bit. Generating 3kw in a 54kmh wind.

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    Default Re: Wind energy

    I have no idea why these are so expensive. I looked around a bit and you can get a 30kw three phase unit from China for prices in that range.

    I am seriously considering importing one or more.


    C
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    Default Re: Wind energy

    Quote Originally Posted by ekkekan View Post
    The Tesup Zeus 3kw unit being 3ph AC sells for R20 000. It does seem from your prices that prices have come down quite a bit. Generating 3kw in a 54kmh wind.
    Rest of the cost is the tower / mast to get it as high as possible.
    You want constant winds, gusts don’t help much even if 150 km/h.
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    Default Re: Wind energy

    Quote Originally Posted by C Africa View Post
    I have no idea why these are so expensive. I looked around a bit and you can get a 30kw three phase unit from China for prices in that range.

    I am seriously considering importing one or more.


    C
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    Default Re: Wind energy

    Quote Originally Posted by bigboy529 View Post
    Rest of the cost is the tower / mast to get it as high as possible.
    You want constant winds, gusts don’t help much even if 150 km/h.
    The unit I looked at the pole is R1100. Also at over about 70kmh gusts the brake is activated. Bear in mind the 3kw is generated at below 70kmh. At 22kmh wind it already generates about 300W at 48V. They also supply an Inverter for about R9000. I would think even in on/off wind you just store the power in your batteries. This is a unit made in Europe and not from China. One would expect to get support. Their manual gives good detail as well as the fact that the concrete needs to be signed off by a structural engineer.
    If I'm missing the boat please educate me on a topic I know little about.

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  12. #10
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    Default Re: Wind energy

    Just had a look at the Tesus website and it certainly looks interesting.

    The Tesup Zeus 3kw unit with controller and pole would cost less than R20k.

    The wind blows every day in PE.

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    Default Re: Wind energy

    Quote Originally Posted by ralton View Post
    Just had a look at the Tesus website and it certainly looks interesting.

    The Tesup Zeus 3kw unit with controller and pole would cost less than R20k.

    The wind blows every day in PE.
    There is a problem here somewhere.

    A 3kW wind turbine would be the size of a tennis court and cost a mint.
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    Default Re: Wind energy

    Quote Originally Posted by Fluffy View Post
    There is a problem here somewhere.

    A 3kW wind turbine would be the size of a tennis court and cost a mint.
    You are maybe thinking of a 3 MW turbine?
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    Default Re: Wind energy

    Quote Originally Posted by Bex View Post
    You are maybe thinking of a 3 MW turbine?
    No 3kW.

    Here is an example.

    https://www.sustainable.co.za/regen-...d-turbine.html

    Any idea how big a swept area of 7 meters is ??

    Oh and it cost a R100K without all the electronics.

    Add the electronics and the mech and electrical hardware, civils, permits, dead cats and birds. - hello 1/4 bar.

    --------------

    Any idea what a 12m tower with a 7 meter swept area turbine actually entails.
    Last edited by Fluffy; 2021/10/17 at 09:39 PM.
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    Default Re: Wind energy

    Quote Originally Posted by Fluffy View Post
    No 3kW.

    Here is an example.

    https://www.sustainable.co.za/regen-...d-turbine.html

    Any idea how big a swept are of 7 meters is ??

    Oh and it cost a R100K without all the electronics.

    Add the electronics and the mech and electrical hardware, civils, permits, dead cats and birds. - hello 1/4 bar.

    --------------

    Any idea what a 12m tower with a 7 meter diameter turbine actually entails.
    If you read the specs carefully you will the the rotor diameter is 3m. 7 square meters swept area. That is not the diameter.

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    Default Re: Wind energy

    I don't know much about this topic, but just out of curiousity, how would say a Climax windmill work connected to a car's alternator work, or not?
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    Default Re: Wind energy

    Fixed but it doesn't change anything.

    A 3kW 7 meter swept area turbine on a 12 meter mast is an expensive monstrosity of immense civil, mechanical and electrical complexity.

    Not a R20K Saturday morning impulse buy you put in the boot and install before breakfast on Sunday morning.

    -----------------------------------

    The point I am trying to make is that the specifications are highly misleading, and the realty is that wind turbines are deceptively difficult.

    Right now I have a very nice one from Banggood in my lab, waiting for me to be able justify the expense of installing it.
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  21. #17
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    Default Re: Wind energy

    I have nothing to gain or lose from this discussion except to share my knowledge and experience and help people.

    Be very aware of specifications and prices of wind turbines, especially from Chinese sources.

    My feedback is in response to a 3kW R20K installation. It ain't gonna happen.

    Over and out.
    Last edited by Fluffy; 2021/10/17 at 09:53 PM.
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  23. #18
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    Default Re: Wind energy

    Quote Originally Posted by ralton View Post
    Are there manufacturers/installers of home wind energy systems I can contact?

    Is wind energy a viable option Vs solar?

    (in PE we do get the occasional breeze)
    Kestrel Wind - Part of Eveready. If you on the N2 East look on their building, they have some installed there.

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  25. #19
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    Default Re: Wind energy

    Quote Originally Posted by ekkekan View Post
    The unit I looked at the pole is R1100. Also at over about 70kmh gusts the brake is activated. Bear in mind the 3kw is generated at below 70kmh. At 22kmh wind it already generates about 300W at 48V. They also supply an Inverter for about R9000. I would think even in on/off wind you just store the power in your batteries. This is a unit made in Europe and not from China. One would expect to get support. Their manual gives good detail as well as the fact that the concrete needs to be signed off by a structural engineer.
    If I'm missing the boat please educate me on a topic I know little about.
    There’s no way you’re putting a turbine designed to catch the wind weighing 50 or 100 kg plus on a R1100 pole, not close to my house anyway.
    If taking in to account the structure, its planning and permissions, ongoing maintenance etc. then the cost per kW for wind energy suddenly skyrockets.
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    Default Re: Wind energy

    Not the expert but how many solar panels,inverter and batteries would equal the expense of one wind turbine that is not guaranteed to generate on most days as well as the expense to maintain said turbine . What is the pay back time Vs solar.
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