I would only add that in addition to Chuck and Bike Dr being generous with the time to answer questions, better yet, you can depend on the information
My personal advise is because of the various ages of the RV that come up on this forum and all the unknown condition of the equipment, from bugs being in the switches, to dirt, to old lubricants, It is prudent to only have 1 source of AC hooked up at a time. If the relay is a NC (normally closed) to shore power, I'm not sure of the actual failure mode, but just knowing it can happen, and be very expensive and time to fix lets me know how I will operate. Does the inverter look to see if 110 V is being supplied either by shore or Gen? One of the things I do like about reading your post answers is to gain more understanding of the complexity as more of the redundant systems are added.
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