Wow - - 229 AHs . . . you're a man after our heart!
At last a direct answer! Thank you sir!
On our last build we cooked with butane and had a smaller fridge. The only real difference going forward is the single burner 1800w induction cooktop, and the bigger (but only marginally increased draw of the) fridge. The cooktop will be used to boil a cup of water twice each morning, and to cook pasta or rice or maybe reheat a slice of pizza or maybe to cook burgers or something like that. High draw but very limited duration.
If I take your point, I shouldn't concern myself with substantial losses from the inverter while, um, inverting. My thought was that I would actually have it conveniently switched such that it would only have power when in use.
If the published numbers that I used are accurate, and if the calculator that I used is correct, we'll probably be closer to ~190AH's most days, with 229 being an absolute -- but reasonably achievable -- outlier.
Before asking a few follow up questions and thereby shifting the conversation, I'm going to just sit tight and listen to the reactions to what I've written above.
Thanks -- all -- for sharing your experience.