The answer is it depends on your requirements. I dry camp 99 percent of the time but rarely use my 5.5kw genset. Having more KW than you require uses more fuel , that is why a lot of folks use these smaller gensets. If you watch a lot of tv or have a lot of electronic devices when you dry camp then a small genset is nice to have. If you travel in the south in summer a large one is req to run 2 AC's. If you stay up north or in high elevations it is not required . In 11 years I only needed the AC's once while traveling in 100 degree weather.