[AllyCat]

Hi,

Sorry I mis-remembered the value. In post #3 of this thread it's quoted as 130 mV. So the resistor value would be nearer 2.2 ohms, if your specified panel were used with the Weatherduino solar interface board.

But I would expect any PV panel to give "reasonable" results. The differences are really concerned only with precise measurements and long-term stability, etc..

Cheers, Alan.