Just like in a house, the general use outlets are on a 15 amp circuit. These used to get labeled things like "general use, general purpose, general lights and outlets or general lighting. These are all outlets (and lighting) that are not required to be on dedicated circuits like bedrooms, living rooms, outside etc.
Kitchen countertop outlets and your fixed in place air conditioner are required to be on dedicated 20 amp circuits so the red 20 amp is your kitchen plugs and possibly your bath plug and refrigerator, and the other one is your AC. The main simply shuts the power off to the 3 smaller breakers, just like the main in a house,
Your converter is tied into one of the branch circuit breakers, probably the blue 15 amp. It is rated for 45 amps output, not input. 45 amps of 12 volt output only requires about 4.5 amps of input
The breakers were made by now defunct Bryant/Westinghouse and all their breakers were color coded by amp rating. Replacements are made by Eaton and are the BR series (BR for Bryant) and are no longer color coded, they are all black with white numbers.
If you wanted to put the converter on it's own breaker you can replace that blue breaker with a Eaton BR1515, either a CTL or a NON-CTL will work. (CTL is cheaper) Then remove the wire nut that splices the converter wire into it's shared circuit and put it on one side of your new 15/15 and the general purpose circuit on the other half. Be sure to unplug your rig before working in the panel.
I've never seen "portable appliances", it's normally called "small appliances" meaning they are not fastened in place like the big appliances. The NEC refers to them as "small appliance branch circuits" or SABC.
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Brian, 2011 Winnebago Via Class A on Sprinter Chassis
2000 Jeep TJ toad
Tucson, AZ
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