I have two 24/3000 Multiplus I's in two different rooms. On one of them, after grid power comes back on, and after the large "clunk" relays and the unit is in Inverter/Charger mode for about a minute or two, I hear a small click from inside the Multiplus. Apparently a small relay.
I don't hear such a click on my other Multiplus I. AFAIK, I have set both of them up the same way.
Any suggestions as to what relay this is?