Roadtrek's New Adventurous

I guess they could be listing the a/c in watts, but why I have no idea. Seems most if not all RV's lists the BTU's. The a/c in the photo looks pretty standard, like around 11,000 to 12,000 BTU, which would need around 2,400 watts to start it. (start-up compressor load) I think when they saId a large AC it was assumed it was a 13,500 BTU.
A 12,000 BTU is as big as the Onan 2500 would run if that's what they are using, so it couldn't be 13,500.
Why is Roadtrek making this so confusing :@