Forum Discussion
BFL13
Apr 07, 2013Explorer II
I need a water buffalo to walk it around slowly with a pole attachment.
Tracking perfectly is optimum, but in real life I found moving the panel just three times a day was sufficient to get a good haul.
The way the sun can be off angle somewhat and still make good amps means you don't lose that much in AH when the amps dip between moves.
The swivel contraption may be less efficient than the flopping one last year, don't know. The thing swivels to be able to point at the sun in the shoulder hours, but then the sun is so low, the panel needs to be quite vertical. By noon and pointing, the panel should be back down. So if it only swivels, you need to pick a fixed tilt that is a good compromise.
With the sun low in the shoulder hours, it is in more atmospherics and the panel is low amps even when perfectly pointed and tilted, so your AH gain is not so much. This means your fixed tilt should be flatter, more like what it should be at noon but not that much.
The flopping contraption had a tilt of only 25 degrees and when flat at noon got full amps. Flopped sideways for mid morning and mid afternoon it also got full amps. No need to change its tilt.
In fact when I tried to raise its tilt, it got fewer amps so I put it back down where I had it. It is hard to visualize, but raising the tilt when it was flopped sideways was like turning the whole thing so it was no longer pointing right. It can get complicated.
I expect I will just use the top part of my stand for fixed tilt South and not bother with the swivel, but it will be there if needed on part cloudy days. More likely to use the swivel for a ground based set-up too, so don't have to play with ropes like if it is on the roof.
I can see having the 130 on the roof fixed tilt and the swivel 200 on the ground for ease of turning it if needed, or just leave it South if more AH not needed. When both are fixed tilted South yield should be 70 from the 130 and 107 from the 200 for 177 AH/day total.
Tracking perfectly is optimum, but in real life I found moving the panel just three times a day was sufficient to get a good haul.
The way the sun can be off angle somewhat and still make good amps means you don't lose that much in AH when the amps dip between moves.
The swivel contraption may be less efficient than the flopping one last year, don't know. The thing swivels to be able to point at the sun in the shoulder hours, but then the sun is so low, the panel needs to be quite vertical. By noon and pointing, the panel should be back down. So if it only swivels, you need to pick a fixed tilt that is a good compromise.
With the sun low in the shoulder hours, it is in more atmospherics and the panel is low amps even when perfectly pointed and tilted, so your AH gain is not so much. This means your fixed tilt should be flatter, more like what it should be at noon but not that much.
The flopping contraption had a tilt of only 25 degrees and when flat at noon got full amps. Flopped sideways for mid morning and mid afternoon it also got full amps. No need to change its tilt.
In fact when I tried to raise its tilt, it got fewer amps so I put it back down where I had it. It is hard to visualize, but raising the tilt when it was flopped sideways was like turning the whole thing so it was no longer pointing right. It can get complicated.
I expect I will just use the top part of my stand for fixed tilt South and not bother with the swivel, but it will be there if needed on part cloudy days. More likely to use the swivel for a ground based set-up too, so don't have to play with ropes like if it is on the roof.
I can see having the 130 on the roof fixed tilt and the swivel 200 on the ground for ease of turning it if needed, or just leave it South if more AH not needed. When both are fixed tilted South yield should be 70 from the 130 and 107 from the 200 for 177 AH/day total.
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