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  1. #21
    Join Date
    Oct 2013
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    Centurion
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    64
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    Default Re: solar panel frame build..

    Quote Originally Posted by Monkey-D View Post
    Look at www.valsa.co.za for mounting structures manufactured locally.

    See below ground structure from them I installed this week for a borehole.

    I am not affiliated or get anything for mentioning them.
    Thanks for the detail pics. What size pump did you install?

  2. #22
    Join Date
    Mar 2008
    Location
    De Wildt
    Age
    58
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    41,325
    Thanked: 18218

    Default Re: solar panel frame build..

    Quote Originally Posted by ekkekan View Post
    Thanks for the detail pics. What size pump did you install?
    Based on the panels a 1.1kW,?
    Jakes Louw
    2012 Jeep Sahara Unlimited 3.6 V6
    Percivamus

  3. #23
    Join Date
    Jun 2009
    Location
    Krugersdorp
    Age
    37
    Posts
    970
    Thanked: 211

    Default Re: solar panel frame build..

    Quote Originally Posted by ekkekan View Post
    Thanks for the detail pics. What size pump did you install?
    Nastec 4HS MultiPower (1300W)
    Installed 1980W (6x 330W) PV to start early and stop late

    40m head now (130m head in phase 2)

    https://nastec.eu/en/solar-energy-pr...hs-multipower/

    Let's not hijack the thread
    Riaan

    2019 Toyota Land Cruiser 200 GX-R
    2019 Toyota Hilux Extracab 2.8GD6 4x4
    2018 Bush Lapa Ratel 4 (B1244)

  4. #24
    Join Date
    Jan 2020
    Location
    Edenvale
    Age
    65
    Posts
    275
    Thanked: 145

    Default Re: solar panel frame build..

    Freind of mine had his panels on a carport at his office. During lockdown affirmative shopping releived him of half the panels 20 to be precise. We took the rest of them off and had to repair cables as the cut them instead of unplugging. We then wrestled with the idea of puitting them back or puting on his office roof. Guess which won. Got brackets that bolt to rafters under the tiles and then the Alu extrusion is bolted to these brackets. There are now 4 banks of 10 panels on the roof with no problem. Was a mission getting them up there but looks good at the end of the day. Get the brackets from a reputable supplier and if you leave long enough you can change panels or replace without much ado.

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  6. #25
    Join Date
    Jun 2011
    Location
    Pretoria
    Age
    47
    Posts
    215
    Thanked: 119

    Default Re: solar panel frame build..

    Quote Originally Posted by Monkey-D View Post
    Look at www.valsa.co.za for mounting structures manufactured locally.

    See below ground structure from them I installed this week for a borehole.

    I am not affiliated or get anything for mentioning them.
    How safe is this structure against theft of the panels or will it be better to mount the panels on a roof?

    I also see that you mentioned that an east-west facing roof works just as well as a north facing roof. Is it better to split the number of panels between the sides facing east and west, or is it better to fit all on the west facing side?

    Thanks

  7. #26
    Join Date
    Jun 2009
    Location
    Krugersdorp
    Age
    37
    Posts
    970
    Thanked: 211

    Default Re: solar panel frame build..

    Quote Originally Posted by Serf View Post
    How safe is this structure against theft of the panels or will it be better to mount the panels on a roof?

    I also see that you mentioned that an east-west facing roof works just as well as a north facing roof. Is it better to split the number of panels between the sides facing east and west, or is it better to fit all on the west facing side?

    Thanks
    PV modules mount to the structure using midclamps and endclamps. Same as on tiled or other roof. Google it to see.

    It's not theft/vandal proof.


    Northfacing gives more kWh per installed Watt PV per year. But the yield gives a peak midday where you need batteries to store energy to then use at different times.

    You will need slightly more PV watts on any other direction than north facing, but an East + West installation starts producing earlier in the morning and later in the afternoon. This flattens out our PV yield curve and is good for grid-tied and less battery storage is required to optimise self consumption.

    If I can only choose one direction, I would rather do North facing than only east or west facing.

    Make sure you have a separate MPPT for each direction. Do not install PV facing different directions on a single MPPT as you will always get the yield matching the lowest producing side if connected together.
    Last edited by Monkey-D; 2021/06/16 at 10:07 PM.
    Riaan

    2019 Toyota Land Cruiser 200 GX-R
    2019 Toyota Hilux Extracab 2.8GD6 4x4
    2018 Bush Lapa Ratel 4 (B1244)

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