Using found materials whenever possible, I have cobbled together various bits to make a solar powered gadget charging station with two motion detecting floodlights. It’s a very unimportant project, but it keeps me from playing in the middle of the street.
in its original configuration there was a 5 watt panel feeding this device and it was a gadget charging station only, after adding two 10 watt LED floodlights that was not going to be enough, so a larger panel was installed.
The panel is a polycrystalline Renogy 50 watter, it seems well made. The battery is a 12V AGM sealed lead acid 9Ah model.
The load presented to the panel by our charge controller, battery, and the electronics is less than what this panel can produce. This is clear because the input voltage rises well above the output to the battery and load, indicating that the charger is limiting the power applied to the battery, as designed. It seems a larger battery could easily be supported because even at 11AM we are leaving watt hours on the table (literally in this case) because the battery is apparently happy.
Changes still to come include a third voltmeter to show panel output.
If one is harvesting solar energy but does not use it all, is that wasteful?