Note I meant a "bank Master" isolation switch, for the LFP bank only
not a system wide one.
That Sterling is designed to go from Starter to House, everything being lead chemistry FYI.
It is triggered to start at 100% Full resting for LFP, and only isolates itself (VSR) at 12.9, which should be well over 50% SoC.
Which happens to be a good storage point for LFP, so long as no further parasites are connected.
As to protecting the lead side, whether the feed which loads etc
left as an exercise for the reader, at least for now.
Either connecting to shore power, or shutting down the parasites is likely necessary.
A third bank, with solar, starts to get more complicated, but so long as the LFP is protected, go for it, lead is cheap.
OTH lead's life is greatly shortened if not mostly kept at 100% Full, and GEL can be tricky to get right.