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Thread: Cheers Eskom

  1. #81
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    Default Re: Cheers Eskom

    Ek gaan kyk so nou-en-dan na die venstertjie .. die battery gaan op tot 55 volt en die lading is so tussen 1.3 en 1.7 kW.

    ... dis nou as ons lekker sonskyn het
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  2. #82
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    Default Re: Cheers Eskom

    Desember se kragrekening was 'n raps oor R600, af van ons gemiddeld van R1500

    Ons gaan met meer sonskyn in die winter nog brer glimlag.
    Johan Mitchell, Swambo : Marthie.

    My beste kennis is di oor my eie onkunde

    '96 Colt DC V8 ... Safari Camper ... '88 Fleetline L
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  3. #83
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    Default Re: Cheers Eskom

    Quote Originally Posted by Cobus. Pelser View Post
    All that expensive stuff needs shade

    Putting up a brave fight against global warming...
    Thys de Wet
    Jimny 2009
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    Ek werk nog, want die bank wil dit so h...

  4. #84
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    Default Re: Cheers Eskom

    Quote Originally Posted by bfreesani View Post
    I can laugh at some of these guys/companies offering systems, and telling you that you can go off grid for under a R100k. Client is led to believe that he can run his entire house on 1-2kw, and yes, even the geyser.

    Still beter is some people that tell you they are actually doing it. I played around with a business in Parys doing alternative energy solutions for a year or two, and the stuff I saw people being conned into was amazing. Unfortunately I could not stick around long enough for the repocussion of the BS to start bringing the clients back to me, that I had lost to companies quoting less than half I was.
    A family related business is involved in solar energy, quite often we come across exactly what you described, as with most things, what you pay is what you get, so if they want to go cheap, by all means, good luck.
    Ivanka - With running modifications by H.O. Memade engineering.

  5. #85
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    Default Re: Cheers Eskom

    Quote Originally Posted by Gaitshi Gubib View Post
    Ons gaan met meer sonskyn in die winter nog brer glimlag.
    Love to know how this will happen? The days during mid-winter have two hours less sun light.

  6. #86
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    Default Re: Cheers Eskom

    Quote Originally Posted by bfreesani View Post
    Unfortunately I could not stick around long enough for the repocussion of the BS to start bringing the clients back to me, that I had lost to companies quoting less than half I was.
    It's a pity as well, because I've seen a lot of new development in Parys, there seems to be money coming in? New shopping centers, new SMME startups?
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  7. #87
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    Default Re: Cheers Eskom

    Quote Originally Posted by TRON View Post
    Love to know how this will happen? The days during mid-winter have two hours less sun light.
    Less cloud cover and lower temperatures is my guess.
    Niel
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  8. #88
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    Default Re: Cheers Eskom

    Quote Originally Posted by TRON View Post
    Love to know how this will happen? The days during mid-winter have two hours less sun light.
    True, but we have almost no cloud during winter.

    It's during those rainy days in summer when one often see no sun for a few days that we struggle .. also electricity supply from Eskom is usually off during rainy days, thunderstorms, for various reasons .. that's when the gennie has to run (petrol=expensive)

    So, consistent supply of sunshine, although a bit less, is what will make us smile in winter.
    Johan Mitchell, Swambo : Marthie.

    My beste kennis is di oor my eie onkunde

    '96 Colt DC V8 ... Safari Camper ... '88 Fleetline L
    '88 Ballade 150.
    "The rule here is that there is no rule" .. MikeAG

  9. #89
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    Default Re: Cheers Eskom

    Finally got the actuator in the mail...
    busy getting it all dialed in and the controller firmware written.

    even has bluetooth and an app to go on the side...
    Last edited by #Rotor; 5 Days Ago at 11:06 AM.

  10. #90
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    Default Re: Cheers Eskom

    2nd day of fine-tuning and it's almost smooth as silk... busy time-lapsing the 3rd day...


    Adding some safety routines around the wind and hail modes, to prevent it from suddenly wanting to move around, while strapped down...
    Also first light and last light procedures, for ensuring it will start up properly in the mornings, and track back eastward, after the day is done...

    Smoothing out the tracking in cloudy situations is still the biggest hurdle though... so many variables...
    Last edited by #Rotor; 5 Days Ago at 11:10 AM.

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  12. #91
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    Default Re: Cheers Eskom

    Lyk goed

    Wonder hoe lyk jou graph in vergelyking met n dag waar jy nie tracking gedoen het nie?
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  13. #92
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    Default Re: Cheers Eskom

    Quote Originally Posted by Charlie100 View Post
    Lyk goed

    Wonder hoe lyk jou graph in vergelyking met n dag waar jy nie tracking gedoen het nie?
    Ek wil dit ook graag sien.

  14. #93
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    Default Re: Cheers Eskom

    Quote Originally Posted by #Rotor View Post
    2nd day of fine-tuning and it's almost smooth as silk... busy time-lapsing the 3rd day...


    Adding some safety routines around the wind and hail modes, to prevent it from suddenly wanting to move around, while strapped down...
    Also first light and last light procedures, for ensuring it will start up properly in the mornings, and track back eastward, after the day is done...

    Smoothing out the tracking in cloudy situations is still the biggest hurdle though... so many variables...
    I see you are actually tracking the sun with a sensor. To stop that jumping around and following a hole in the clouds try this - work out the angular velocity of the sun relative to your position. Then set you controller to have a max velocity equal to that with a small safety margin to play catch up if needed.

    IMHO The best way to do sun tracking is to use a mathematical algorithm that predicts where the sun is at any given time. One of my system you enter your LAT and LONG, Date and Time, and the array slews immediately to face the sun exactly. I designed and commissioned the system (its in Malaysia) and I am still responsible for it. Unfortunately I didn't write the code, but the algorithm is well documented on the internet. This way you can also track (excuse the pun) errors and set of an alarm if you have a hardware or software glitch.
    Cheers

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  16. #94
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    Default Re: Cheers Eskom

    What I ended up doing was measure ambient light levels with the sensor, By doing that I can know when it's not in direct sunlight, IE. a cloud is in the way, I then switch to a timed base forwarding. Once the cloud is out of the way, light levels will pick up and the sensor tracking takes over again...If the whole day is cloudy, it will basically just sweep across at a set speed...

    Problem with the LAT/LONG way of doing it, I do not have any positional feedback from the chinesium actuator, so no way to know where in the stroke it is at any point in time other than at the 2 bump-stops, ether side...

  17. #95
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    Default Re: Cheers Eskom


    Twas a beautiful day today.
    some minor tweaking, but it's practically done now...

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