Hi,
I have a cctv system running in my garden shed using around 11W, running from a small UPS connected to mains power.
On the roof I have a 19V 40W solar panel connected to a charge controller charging 12V battery. That is hardly being used so I want to use that to run the CCTV during the day and switch over to mains when the output on the solar panel drops to below threshold.
What I was thinking is to have ESP32 connected to a relay and the UPS power supply connected to NO, mains connected to COM and solar inverter output to NC.
Would that work?
Or is there a better way of doing it?
Thanks
