I bought an emporia home energy monitor and it needs to have 2 neutral wires put in the the neutral bus bar on my panel. I know that neutral and grounds can share a bar, but neutrals cannot be double tapped, while grounds can (or be triple tapped on larger lugs). I already have all the grounds doubled up (where I can reach them), and still need one more slot for the other neutral.
My two options (that I can think of) are
1. Pig tail some of the neutrals so that I can get 4 neutrals to one lug by pigtailing 2 or more together. Is this allowed?
2. Adding another ground busbar. I’d have to extend most of the grounds by either pigtailing 1:1 to the new bar, or doubling or tripling up like in the first option (if allowed).
Number 1 is the simplest for me, but I don’t want to do anything dangerous or not to code. The panel is already a mess.