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Panel Angle

Featured Replies

I have not noticed any commercial or residential solar panel installations that adjust the angle of the panels to maximize production. I know this is done on some installations, but not others. Google's response was a bit sketchy.

Are any of you seasonally adjusting your panels?

If so, how much do you think you gain?

Not here, our angle isn't ideal but at Thailand's low lattitude there's not really much difference through the year.

You can feed your data into PVwatts https://pvwatts.nrel.gov/ to get an idea of the theoretical gain.

In reality, panels are so cheap now that, unless space is at a premium, just adding more panels is cheap and easy.

"I don't want to know why you can't. I want to know how you can!"

  • Popular Post

Rather than adjusting the angle of my panels, I fitted panels at all angles.

I got so many questions about it that I made a video to try and explain it.

  • Author

Given the plummeting cost of servos and actuators and whatnot, how much it would cost to direct the panels in real time.

12 minutes ago, Yellowtail said:

Given the plummeting cost of servos and actuators and whatnot, how much it would cost to direct the panels in real time.

I don't think the running cost would be very significant at all, but the cost of building it or importing it to Thailand is another question.

I found that trying to be one of the first to do something in Thailand is never easy or cheap.

That explains why I don't have videos on my geothermal system or my energy recovery ventilation system.

  • Author

I don't know, it seems like it would not take that much. If you have a rectangular array bisected with a center axle, rotavating it would not be that much of a challenge

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Actuators and control electronics for both single and dual axis trackers are readily available on Lazada.

The question is - Is the extra energy you generate going to payback the cost in a reasonable time vs just spending the $$$ on extra panels?

EDIT If you don't fancy fabricating the hardware there are quite a few options on AliBaba. Pricing is, er, less than cheap.

No image preview

【Free Bracket】12V 1000N Linear Actuator 400MM Stroke Sola...

Free Bracket 12V1000N Linear Actuator 400MM Stroke Solar Tracker Motorisation Motor 90mm/s Linear Motor Telescopic Rod

No image preview

(XGON) Dual Axis Solar Tracker Controller Sun Tracker Aut...

XGON Dual Axis Solar Tracker Controller Sun Tracker Automatic Tracking Controller System Platform Tracking

"I don't want to know why you can't. I want to know how you can!"

  • Popular Post

With panels being as cheap as they currently are, how about a passive tracker, same idea as @Bandersnatch has used.

You may have to fiddle with the angles to get the best compromise output..

Solar tracker comparison diagram.png

"I don't want to know why you can't. I want to know how you can!"

  • Author

Panels are cheap, but real estate is not cheap. My lot is 20m X 30m, and half of that is house, the roof of which does not lend itself handily to panels.

At this point, I'm thinking about a 4m X 4m X 12m out-building with a solar roof. I could use a nice shop...

19 hours ago, Yellowtail said:

Are any of you seasonally adjusting your panels?

5% difference, so not worth the effort.

Of course, this thread has got me thinking how to get more panels into the space we don't have.

One could add panels and a single-axis tracker to one of our walls that looks roughly south-east and has no shading until after 1PM.

That could add some early morning production before the car-port really gets going.

We currently don't really need the extra production but ...

"I don't want to know why you can't. I want to know how you can!"

  • Author
7 minutes ago, Crossy said:

Of course, this thread has got me thinking how to get more panels into the space we don't have.

One could add panels and a single-axis tracker to one of our walls that looks roughly south-east and has no shading until after 1PM.

That could add some early morning production before the car-port really gets going.

We currently don't really need the extra production but ...

Mirrors...

2 hours ago, Crossy said:

With panels being as cheap as they currently are, how about a passive tracker, same idea as @Bandersnatch has used.

You may have to fiddle with the angles to get the best compromise output..

Solar tracker comparison diagram.png

I have that passive "tracker" on a 45° sloping roof, 7.2kwp to the east and 7.2kwp to the west.

My power output curve is of course not flat as in this picture, it is a bell curve (or half sinewave) peaking at midday.

2 minutes ago, lom said:

I have that passive "tracker" on a 45° sloping roof, 7.2kwp to the east and 7.2kwp to the west.

My power output curve is of course not flat as in this picture, it is a bell curve (or half sinewave) peaking at midday.

Could you post a production graph for a clear day please. Real world data is always better than theoretical.

"I don't want to know why you can't. I want to know how you can!"

8 hours ago, Crossy said:

Could you post a production graph for a clear day please. Real world data is always better than theoretical

w

8 hours ago, Crossy said:

Could you post a production graph for a clear day please. Real world data is always better than theoretical.

Couldn't find a beautiful full curve so you have to imagine the curve after midday, it is just the reverse of the morning part. It is not hot enough right now for us to have such a high consumption that the batteries are not full around midday.solargen.jpg

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