No decent info from Alliance on our soon-to-be-new Delta 262rb, so I have questions. What does ‘inverter prep’’ men from Alliance? When I mentioned I wanted an inverter, the dealer listed $700 labor to install one. Wiring to battery, etc. If our Delta is ‘prepped’ for an inverter, why so expensive? Same question about ‘prep’ for TPMS, internet, etc? Since Alliance fielded a camper without an owner manual or documentation, it’s tough to understand the company thought process. I also need to decide the size and type inverter along with battery topics.