Hi,
I was just looking at the j1939 AC PGNs using Actisense's NMEA Reader and I wonder if the Device Function IDs are the wrong way around.
According to NMEA, device ID 153 is AC Main (Utility/Shore) and 154 is AC Output.
But your AC Input/Mains details use ID 154.
It also is reversed in this document - https://www.victronenergy.com/upload/documents/Technical-Information-Data-communication-with-Victron-Energy-products_EN.pdf
I also notice you use PGN 127744 on some other devices, is there a reason you don't on the MultiPlus-II?