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When I first received the Mayfly V 1.1 a few weeks ago, I hooked up the all of the connections: Battery, Solar Panel, and sensor. Everything worked fine. Over the last week I have noticed that the yellow solar charging LED is not lit when the Sun is out. However looking at the CSV generated file the voltage is higher like the panel is charging the battery and the voltage is lower when the Sun is down.
I have checked the Solar Panel to external cable connection, the connection to the Mayfly board. Everything looks OK.
Is the LED light just burned out? Does the board have a malfunction? Or do I just keep an eye on the voltage levels like I am doing?
Thanks for your help, Roger