Power w/o battery?

cccougar wrote:
Is it possible to be plugged into shore power and have power in the tt without the battery being hooked up?

Sure, just make sure the battery cable ends aren't shorting out to anything, including the trailer frame. Unfortunately you haven't told us what rig you have which could be important in that older trailers with converters built 15, 20 yrs ago often did require that the battery be hooked up to act as a buffer for the converter. I know of no such requirement for converters used in newer trailers built in the last 10 yrs or so.