You are missing a lot.
The inverter needs to be as close to the batteries as possible, BUT NOT I THE SAME AIR SPACE, you do not want it breathing battery fumes.
You also do not want it powering the air conditioners, water heater, fridge, converter or any electric heaters you may have.
The proper method (this may also include a converter upgrade) is to install a 30 amp breaker (you may replace one of the existing breakers) and route 10ga (or 8ga) from there to an IN-LINE type inverter (Inverter/charger) then run a 2nd 10 (or 8) ga back from the inverter to a SUB PANEL (2nd breaker box) note, some inverters have that built in but.. Well easier this way) the sub panel goes next to , or above/below, or behind the existing panel (Mine is behind in a cabinet)
Transfer TV's Microwave and selected outlets to the sub panel.
Disable Factory converter if desired (or the inverter's charger if desired)
1 inverter acts like a UPS, if I'm cooking dinner, or watching TV and power fails nothing blinks except for a couple LEDs on the inverter monitor panel (NOTE: True Sine Inverter). Selected indicators go dark around the RIG to let me know of the problem.
Converter/charger in Inverter is a top end 3-stage,, many factory are not (mine is as well and for assorted reasons I like it better than the Prosine's.. So I disabled the prosine,, The Factory unit is a plug in model (not hard wired) and from time to time I've oopsed and unplugged it, when this happens having a 2nd unit I can TURN ON from inside,, very nice)
Home is where I park it!