You have at least two batteries, one for the engine and chassis components, and another for the "house" part of the RV. Everything on the chassis woll work off the chassis battery, just like on a car. The house part is a bit more complicated because some things may have multiple operating modes, but generally everything in your Freedom Elite can run of 12v (battery) power except the roof a/c unit. Your fridge and water heater probably have two modes, one which uses 12v (battery) power and LP (propane), and another that uses shore or genset power instead of LP.
A few rigs have an electric-powered awning that may work only with shore/genset power, but I don't think your Elite is one of them.
The slides probably work off the chassis battery, but in any case they are 12v powered and do not require shore or genset power. Your coach owner manual probably tells you to have the engine running to deploy the slides, to assure there is plenty of power for them.