Maybe b/c my unit is so small I didn't even consider central wired, etc. , but I do have a GOOD one $$$ that I faithfully connect to the posts at campgrounds. It did save me from connecting to an unsafe electric box....but then it was only an over night and that whole campground was an experience...... I spoke to a RV repair/remodeler about an inverter and he pointed out that I already had one set up for a TV and again given my small size and limited electric need that I could probably get by with one off the shelf to run the computer and the odd electrical stuff that I didn't want to bother the generator for. He did offer to put one in for me but said he didn't think it was worth the cost.......I told him I would try it his way and be back if it didn't work out. :=)