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Array Temperature Monitoring (Work In Progress)

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I have a small temperature experiment starting today...

I managed to source some iButtons (temperature only) to measure the temperature at 2 different points on my PV array.

Buttons are now installed and I'll give them a few weeks to collect data.

Some initial specs:

  • Zinc corrugated roof/Aluminium adjustable frame (tilt = 45deg)
  • 15 min reading intervals
  • Button 1:  Bottom - Located inside of the panel frame but NOT on the glass backing (about 150mm from roof)
  • Button 2:  Centre - Located inside of the panel frame but NOT on the glass backing (about 400mm from roof)
  • Button 3:  Top - Located inside of the panel frame but NOT on the glass backing (about 700mm from roof)
  • The array is 6 x 310w panels long so the buttons are placed in  middle of the array. (Panel size = 1800mmx900mm)

I should be able to plot the 3x sets of PV readings on a spreadsheet with hopefully weather data as well (maybe only temperature ;) )

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I have a similar setup running for some time already, but used some DB1820 sensors connected to a Raspberry Pi. On average, the temperature below my panels are 10 degrees cooler than in direct sun light. 

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12 hours ago, SilverNodashi said:

I have a similar setup running for some time already, but used some DB1820 sensors connected to a Raspberry Pi. On average, the temperature below my panels are 10 degrees cooler than in direct sun light. 

Nice!

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