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Solar Power Voltage Limit

Home › Forums › Mayfly Data Logger › Solar Power Voltage Limit

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    • 2016-12-22 at 8:44 PM #1875
      Bert Rubash
      Participant

        I notice in the MayFly schematic near the diode for the “v_solar” input a “20V-1A” note. The MCP73831 charge management controller data sheet lists 6 volts as the upper limit for Vdd. I assume I need to pre-regulate solar power down to 5 or 6 volts; is that correct? What does the “20V-1A” note mean?

      • 2016-12-22 at 9:39 PM #1876
        Shannon Hicks
        Moderator

          “20V-1A” is just the rating of the protection diode on the PC board. When choosing a solar panel for the Mayfly, you should only connect ones that are listed as 6 volt panels, and do not use a 9-volt or 12-volt panel.

        • 2016-12-23 at 1:10 AM #1879
          Bert Rubash
          Participant

            Thanks. Just what I needed to know.

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