Sure.
I had two neighboring unused locations in my panel. I also had two 20A breakers. (Yes, 20A is not going to protect the emonVs, but not any less than plugging into a 240V outlet connected to 20A breakers. Ground (earth) (green or bare copper) and neutral (white) go to their appropriate bus. (Local regulations for this vary widely.)
All the panels I’ve encountered in NA alternate L1 and L2. This is allows for neighboring breakers to be joined to form a 240V circuit. I arbitrarily assigned one of my feeds from the utility L1. By looking at where the breaker connects to the bus, one can ascertain to which of L1 or L2 the breaker (circuit) is connected.
I put a clip across the the two emon breakers so they both trip if one trips.