Honda inverter type generator would be my choice.. What kind of rig? What do you want to power? AC? If so, what size is your AC? A 3000 may not be able to run your 13.5k and probably will not run a 15k AC. If you just want to run your lights and charge your batteries you don't need a 3000 watt. You could go with a Honda 2000i and if you decide you need more you can go with a second 2000 Companion. Keep in mind a 3000i weighs 134lbs...