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Forum Index : Solar : Paralell strings facing different directi
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Madness Guru  Joined: 08/10/2011 Location: AustraliaPosts: 2498 |
It might give you an even output but how does it effect total daily output at that angle? There are only 10 types of people in the world: those who understand binary, and those who don't. |
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| Warpspeed Guru Joined: 09/08/2007 Location: AustraliaPosts: 4406 |
Total daily output is obviously going to be less, but that is not why we build a virtual tracker. The aim is to get far more in very early morning and late afternoon, without the massive mid day peak. Its perfect for grid tie, or when operating without a battery. Usable power ALL DAY will be a lot more useful in many applications rather than a very short but massive mid day power peak. Cheers, Tony. |
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| Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498 |
I am looking at from my situation which is off-grid, getting more even spread is nice. But if it results in less power particularly on cloudy days it would not be best for me. There are only 10 types of people in the world: those who understand binary, and those who don't. |
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| Warpspeed Guru Joined: 09/08/2007 Location: AustraliaPosts: 4406 |
With total cloud cover and only dim diffused light, it does not make much difference which way the panels are oriented. What does matter is the total combined exposed panel area, so nothing is really lost as regards mid winter power. Grid tie is different, because the aim should be to minimise (expensive) import power. A massive mid day peak fed back into the grid may not get you much at todays miserable feed in tariff rates. The same thinking may also apply to minimizing battery capacity, or making best use of whatever battery capacity there is. Cheers, Tony. |
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Tinker Guru Joined: 07/11/2007 Location: AustraliaPosts: 1904 |
The thing I don't like with these type brackets is that they screw to the skinny bit of wood the tiles hook over. I do my own design brackets where the under roof part screws to the much heftier whatsitsname beam (the one angling down from the apex). These I can poke out under the bottom of a tile without having to remove *any* tiles. I have never seen brackets like mine advertised. Klaus |
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renewableMark Guru Joined: 09/12/2017 Location: AustraliaPosts: 1678 |
 Tough man to please Tinker, the AS for Aust is to screw to the hardwood timber rafter. Haven't seen any incidents of entire arrays being pulled off unless it was a cyclone. Up to you mate. Have a read through this mate here They fix onto the rafter that runs from the apex down, you confused me at first but when I remembered how I fitted mine that's when I recalled that is what the bend in the tile hook is for, to go over the batten and bend back 90 deg to be parralell to the rafter where it attaches. That is why they have all the holes in the bracket, so it can be screwed into the rafter and be offset to either side to fit neatly in the dip/lower section of the tile. Cheers Caveman Mark Off grid eastern Melb |
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| George65 Guru Joined: 18/09/2017 Location: AustraliaPosts: 308 |
Thanks For the link^^^^. I have got a couple of different racking systems with panels I have bought lately and had no idea how it all went together. Knew what the batten brackets were but that was about it. I'M glad I have a tin roof here. Everyone does in these parts come to think of it. Panels on the garage I just pulled out a screw holding the tin down, got a cheap but tough "L" bracket from bunnings, screwed it back down and then used a tek screw into the panel. One Bracket per panel each end and I couldn't tear the things up when I tried. Just the same, put 2 in the end panels because I figured they would get the most wind force. At Christmas I found some boxes of the proper solar clamps in a dumpster so now I can take the roof screw out, replace it with a new, slightly longer one with a new rubber seal and hold the panel down that way. Not sure it's any better than the bracket as that has a positive tie to the panel but they will look a bit more professional on the house where you can see them. Also a bit easier where 2 panels butt together. |
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| renewableMark Guru Joined: 09/12/2017 Location: AustraliaPosts: 1678 |
I love your stories George, I have to ask mate, what were you doing in a dumpster at Christmas? Cheers Caveman Mark Off grid eastern Melb |
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| George65 Guru Joined: 18/09/2017 Location: AustraliaPosts: 308 |
Looking for thrown away Treasure! And I found some! :0) |
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| Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498 |
It is incredible what is thrown out, my 5KW Zeversolar cost me $5 at the local tip shop. Now George will love this, they will not sell anything electrical now for safety reasons. Last lot of panels I put up I used the existing holes in the back, I set up 30mm SHS gal tube predrilled and at the right spacing. I left a 10mm gap between each panel, if you wanted to make a waterproof roof you could do the same and silcon all the panels together. There are only 10 types of people in the world: those who understand binary, and those who don't. |
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| Tinker Guru Joined: 07/11/2007 Location: AustraliaPosts: 1904 |
Thanks for that Mark, a picture speaks a thousand words... I thought these brackets screw to the skinny battens, not so it seems. What I'm making screws to the side (not the top) of that beam. The above attachment requires tiles to be lifted off, something I'm very weary off since they are 60 year old concrete tiles and rather fragile to extract from their neighbors. My idea is to poke them out from inside the roof cavity, line them up and then attach to the beam. Its not hard to bend a few brackets from flat 3x40mm bar, they get sent to the galvanisers with the panel mounting rails (angle iron), no problem there. Klaus |
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