An easy way to understand the basic key function of Solar Cell

I have found a very good way to understand the basic key function (or phenomenon) of a Solar Cell. I have read some documents on the function (or phenomenon) of a Solar Cell in some books and some websites (some are good, some are not good or even wrong at least confusing). But I did not encounter my method so far.

To check Diode Voltage by a multimeter (my digital multimeter has this function) with the opposite direction of the +/- shown on the back side of the panel at not very bright place. My multimeter shows "----", which means more than the max checkable (about 2VDC). Then gradually give more light to the panel. The multimeter shows "2.1- 1.9V", which shows . And then further increase the light. It shows less and less values 1.8V -- 1.5V -- 1.2V -- and finally 0.00. This indicates the increasing light creates an increasing voltage at the PN junction opposite to the original PN junction voltage (under a little light condition). This is it. Very easy and you can easily guess what light does to the panel (Solar Cell). After I found this fact it was much easier for me to understand what the text books say like "the current in Solar cell is the reverse current." or "Internal Voltage Difference Creation", etc.


Solar Energy Division of Asnet Components Ltd (www.asnetcomp.com)

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Epoxy Solar Cell Modules

Reliable Epoxy Solar Cell Modules (Panels) are now available from Solar Energy Division of Asnet Components Ltd (www.asnetcomp.com). Epoxy Solar Cell Modules can be used as a source of energy for small wattage applications, usually less than 1W.
As they are easy to make there are many suppliers in China. Most of them are small-mid size marketing oriented factories with little concern of quality. Not all of them are unreliable but not easy to find good suppliers. Be cautious.

1) Epoxy Solar Cell Modules (Panels) do not have a long life due to their nature - simple structure - Solar Cells + PCB + Epoxy with no particular materials and technology used for protecting the Cells inside.

2) Epoxy Solar Cell Modules (Panels) are not so efficient as a module (Module Efficiency) even they use good Cells since in Epoxy Modules no particular techniques are used for efficient absorption of light.

For more details, contact

Solar Energy Division of Asnet Components Ltd (www.asnetcomp.com)


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