To , add i have one on my 30 amp TT. If you need it once its worth it, especially if you have a week long stay. I would hate to fry my ac or fridge and have to cut a vacation short for a few bucks. The biggist issue you will run into is low power. That can ruin an ac. So surge is for more power, a good ems does it all. You have 2 choices , plug and play( but people say some steal them, or a hardwired, recomended if you can swing it. I have a plug in play because i got it last minute and didnt have the time to do the wiring. No one stole mine yet( knocks on wood).
