Hi Paul
I just wanted to confirm my understanding of the number of suitable analogue ports that are available. I am thinking of getting a prototype PCB made with as many ADC connections as possible connected to CT sockets and AC monitoring sockets grouped in the most sensible way which for 3 phase I assume to be 2 CTs to 1 AC in the case of both 3 phase grid and 3 phase PV. I am still trying to understand the tutorial posted by @dBC.