Simulating Solar Panels Under Sunlight

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Discussion Overview

The discussion revolves around the feasibility of simulating solar panel operation under sunlight by using a constant current source while covering the panel with dark paper. Participants explore the implications of this approach, including potential risks to the solar panel and the characteristics that could be tested through such an experiment.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant proposes simulating solar panel operation by using a constant current source while covering the panel with dark paper, questioning whether this could damage the panel.
  • Another participant expresses skepticism, suggesting that a solar cell may not allow electricity to pass from an external source, comparing it to an LED's behavior.
  • A different participant counters that an LED does produce some current when exposed to its emission frequency, indicating that the initial claim about solar cells may not be entirely accurate.
  • One participant seeks clarification on the purpose of the simulation, asking which specific characteristics of the solar panel the original poster is interested in testing.
  • Another participant suggests that the original poster might be confusing solar panels with Peltier devices, which operate differently.
  • A later reply mentions a successful implementation of a "Dark I-V test" to test an inverter without sunlight, noting that this method does not damage the solar panel and requires a significant power supply.

Areas of Agreement / Disagreement

Participants express differing views on the validity and safety of the proposed simulation method. There is no consensus on whether the approach is sound or what the implications might be for the solar panel.

Contextual Notes

Participants reference various characteristics of solar panels, such as dark current, reverse saturation current, and efficiency, but do not reach a conclusion on how these factors relate to the proposed simulation method.

gurhan
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I have an interesting question:

Could we simulate the solar array operating
under sunlight, by covering the solar panel with dark paper and using a
constant current source to pass rated current INTO the solar panel (e.g.
using a bench power supply on constant current mode with a DC link
inductor if necessary). I will probably need a fan to cool the solar
panel. I am not sure if this would damage the solar panel however.
I could vary sunlight "intensity" by changing the value of the current
passed into the solar panel.

Regards
 
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That just doesn't sound right to me, but I'm not an expert in electricity by any means. As far as I know, though, a solar cell won't pass electricity from an outside source. That would be similar to expecting an LED to produce current when exposed to its emission frequency.
 
Danger said:
That would be similar to expecting an LED to produce current when exposed to its emission frequency.

Actually, it will produce current. Not much, but it will.
 
:-p ..[/color]
 
gurhan said:
I have an interesting question:

Could we simulate the solar array operating
under sunlight, by covering the solar panel with dark paper and using a
constant current source to pass rated current INTO the solar panel (e.g.
using a bench power supply on constant current mode with a DC link
inductor if necessary).
What do you mean by "simulate"? What is it that you are trying to learn from this experiment? A solar panel is just a bunch of parallel connected photodiodes. The panel has datasheet characteristics like dark current, reverse saturation current, efficiency (light into photocurrent out), capacitance, etc. Which characteristics are you interested in experimenting with?
 
Are you maybe thinking that solar panels work like Peltier Heaters/Coolers?
 
I have done that and that worked. Actually it is called Dark I-V test. However I did not use for that purpose. I used to test my inverter under lab conditions without the sun. This does not damage the PV panel it even does not get hot. However you need a big power supply for that. Set the current exactly Isc from the data sheet of the PV module and set the voltage 10-20 percent higher than Voc.
 

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