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Hi all,
Many thanks @uncle_bob for all the information provided!
If I use a voltage+current measurement device with a solar cell, can I just easily find the W/m2 by multiplying the current with the voltage without needing to find Isc?
Thank you and best regards
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Hi,
Welcome to the forum.
Please read the theory behind using a solar cell as a cheap pyranometer. You can't use a solar cell for that purpose unless it is working very near the short circuit zone, thus the need to know the Isc to calculate the Rsh
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18-08-2019, 23:37
(This post was last modified: 18-08-2019, 23:38 by
HF_ATL.)
Hello,
Thank you @AllyCat and @Werk_AG for your comments.
I have a 0.5 Watt Round Polycrystalline waterproof Solar Panel (2.5v, 250ma, 11.2cm diameter) which I would like to use to measure W/m2 in my home.
I have already some other sensors in my station (temp, humidity, etc.) and decided to include also the solar radiation measurement.
For voltage and current reading I have the INA219 (current shunt and power monitor with I2C interface), which I thought of using for this measurement but seems that the reading the voltage (with a accurate calc of the Rsh) seems the way to go...
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Thank you both!
Indeed I'm also Portuguese so the portuguese post would be even better for me