smkettner wrote:
If you are pulling power off the RV panel you will pop in a 30 amp breaker to connect your feed wire to the bus.
Sub-panel will depend on the style. Larger panels often will have input breakers(mains) and smaller stuff will often have just a terminal for input and breakers for the output.
How many branch circuits do you plan to feed?
$12 4 circuit panel at HD
Note it just has terminals for input where the inverter will connect.
I went to Home depot and everything they had was for 240 volt and had 2 hot legs