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Blog Solar SPEC - Challenge Finale
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  • Author Author: ralphjy
  • Date Created: 14 Sep 2018 9:55 PM Date Created
  • Views 931 views
  • Likes 7 likes
  • Comments 2 comments
  • solar panel
  • iot_projects
  • conservation_projects
  • solarpwrdevicesch
  • iot design
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Solar SPEC - Challenge Finale

ralphjy
ralphjy
14 Sep 2018

We're at the last day of the Heat is On Challenge.

 

Here is the initial block diagram of my project:

image

I've implemented all of the hardware elements with the exception of only implementing a single temperature sensor and changing the sensor type to an 18B20 probe.  Unfortunately, I haven't deployed the unit to my rooftop solar array yet because I am still testing and tweaking the design.

 

SPEC Final Hardware:

image

 

Finale Video:

Not much interesting in watching data accumulate, so you just get a video of me talking.....

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Please reference previous blogs for design details.

 

Summary

I am reasonably happy with the outcome although I know that it is only the beginning.  At least now I have a method of direct feedback of the environment of my solar array.  Only time will tell how useful this information will be.  I would like to eventually get to the point that I could accurately estimate how much total power I should be getting from the array (by using the irradiance and panel temperature).  I'll probably be surprised at how hot the panels are getting.  That's something that I had never considered before.

 

I need to incorporate some power management in the firmware (at the very least stop transmitting when the irradiance is low).  I'll need to implement that before I deploy the unit.  There were rainy periods last winter where the array would not even generate 1kWh for the full day.

 

I also realize that my printed PLA case is not rugged enough to survive an extended period on the roof.  I think what I have will allow me enough time to evaluate the design.  When I rev the design I'll try to find an outdoor electrical box that is more rugged.  I'll need to stay with plastic since I'm using WiFi.

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Top Comments

  • genebren
    genebren over 6 years ago +3
    Well done! This was an interesting project. Hopefully the data will be helpful to you enabling you to get the most out of your solar array. It will be interesting to follow along with your enhancements…
  • jw0752
    jw0752 over 6 years ago +3
    Hi Ralph, I enjoyed following your project. You may find that the proper coating on the plastic PLA will block the uV light and extend the life of your printed case. I too hope you will followup so we…
  • jw0752
    jw0752 over 6 years ago

    Hi Ralph,

    I enjoyed following your project. You may find that the proper coating on the plastic PLA will block the uV light and extend the life of your printed case. I too hope you will followup so we can see the continuation of your project.

    John

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  • genebren
    genebren over 6 years ago

    Well done!  This was an interesting project.  Hopefully the data will be helpful to you enabling you to get the most out of your solar array.  It will be interesting to follow along with your enhancements as you go forward.

     

    Gene

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