I’m a few weeks into running Solar Recharge and Li-Po Discharge Trials with several Xenons.
I’m impressed with the Performance and truly excited about the results so far, but noticed something different today and wanted some clarity for my educational benefit.
I’ve been testing several small Solar Panels, each using the USB connector on the Xenon.
I also use a 6.2V reverse biased Zener Diode for protection, but the small panels that I’ve tested haven’t reached 6.2V in the field.
Li-Po measurements using
voltage = analogRead(BATT) * 0.0011224 work as expected.
Today, while swapping to a different Solar Panel, I decided to land the Panel’s wires on the USB and GND Pins instead (not using the USB Connector as all previous tests).
Li-Po measurements are now Incorrect when the Xenon is sourcing from the Solar Panel Only, but not recharging or discharging the Li-Po.
When Solar Panel is landed on Pins:
- Li-Po measurements are Correct if the Xenon is Charging the Li-Po
- Li-Po measurements are Correct if the Xenon is Dis-Charging from the Li-Po
- Li-Po measurements are Incorrect (much higher than actual battery voltage) if the Xenon isn’t doing either of the above (when the panel is providing a Voltage source).
I assume this could be explained by the circuit…but not by me I’m afraid.
This isn’t a major issue, but the main reason I’m asking is to determine if there is a preferred location (based on the hardware design) for landing a Solar Panel on a Xenon. If so, I’ll focus my efforts in that direction only.
Thanks in Advance !