In a little conversion app I found, 5 kw is equal to 17,075.9 BTU/hr, in the power converter.
It also says that 5 kw/hr is equal to 17060.71 BTU, and this is in the energy converter.
Obviously, one has time in it, and one does not. Therefor, there's no direct conversion.
Added: But, yes, to your question, for all practical purposes.