I believe the Landmark, Bighorn, and Cyclone come pre-wired; but the Sundance is not because it is wired with only a 30amp shore line. As far as the Big Country I do not know. We put the 15K Dometic in the bedroom and it helps on the inital cool down. Our Bighorn is kept on the lake front with the livingroom at the waters edge facing west, so it warms up pretty good in the afternoon.
John