Solar ready usually means that it is only wired for solar. In other words, there should be leads coming from the roof to the pass through or somewhere inside the trailer. In addition to a solar panel you need a solar controller. The solar controller, or charge controller/regulator, maintains the battery/batteries and prevents overcharging. It is installed between the solar panel and the batteries.
My Rockwood came with a 200W panel on the roof and a 30 amp Go Power GP-PWM-30-UL controller installed. It was wired with leads going to the batteries.
2013 Silverado 2500HD LTZ CC 6.6L Duramax Diesel
2023 Rockwood 2445WS
Buster, miniature Dachshund
2023: 9 trips, 48 nights in 12 states, 2 provinces, 8120 miles
2022: 3 trips, 18 nights in 4 states, 2352 miles
2019: 7 trips, 43 nights in 6 states, 5336 miles