My EG4 inverter makes a loud clicking noise while the "Normal" light alternates on and off. This is 24/7. Is this indeed normal behavior rather than just having the green light stay on and not a constant loud clicking noise?
It sounds like a click of an internal relay.
https://www.youtube.com/c/MikesGarageRoute66
https://www.windsolarforum.com
That is not normal behavior, do you have PV and batteries in your system?