Thor Forums

[TurnerFam]

yes, it's 'possible' to upgrade from 30amp to 50amp(240v service) in your RV, but it's not a simple task, as you would have to replace your 30amp Main Panel, which is only 120v, to a new 240v 50amp panel, which is designed to split the incoming 240v service into two 120v 'sides'(50amps on each side, for a total of 100amps of power), and making sure to 'share' the appliances and devices and outlets between the two sides(i.e., air conditioner #1 on the left side, #2 on the right, elec water heater on the left, battery charger on the right, etc., etc.,...)

as for the 'wiring', yes, the incoming 50amp 240v wiring is a larger diameter wire, including the new Shore Power cord you would need, and the ATS will need to be a 240v 50amp type, and the wires leading FROM the ATS to your new Main Panel.
The wiring 'within' the main panel, your breakers, are already sized properly, so they don't have to change.

Most 50amp RVs don't really ever make use of 240v service, but that is exactly what is coming into the coach thru the shore power cord from the Shore Power outlet(a 4-prong cord - RED hot wire, BLACK hot wire, WHITE shared neutral wire, and ground wire)...
The Main Panel in your RV simply 'splits' this 240v service into two 120v sides so that you can make the best use of all of the 'power' available, 100amps!