Welcome from Utah
Hard to know much about your trailer from your info. Is it new, '21 '22?
Some of the newer trailers were set up as solar ready which meant there was just a solar port installed usually at the front of the unit by the batteries where you could plug in a solar kit. Kits consisted of the panels and a controller.
Other trailers were equipped with the "OTG" Off the Grid package. Pretty sure the seller would have mentioned the OTG package since it is a complete set up including panels, controller, inverter and several plugs wired to the inverter.