Call the company or dealer.

Most people won't have a clue.

Hopefully its quiet if you go to a campground, although many of those have electric outlets these days.

It my be rated by amps or by volts.

I don't own an rv however I own a couple of generators. It is best you do some research on generators so you will understand better on what you are buying. For instance generators have two ratings. Continueous watts and peek watts.

As an example a 5000 continueous watt/5500 peek watt rated generator is suspose to handle 5000 watts total of continue use. If you just turn on your generator and you are using 5000 watts it will draw over 5000 watts at first before it goes back down to 5000 watts. So when you go over that 5000 watt rating you are going into the peek watts.

When buying a generator to use if the power goes out in a house what you do is count up all the watts you want to run like a tv, fridge, lights, etc. Then choose a generator that goes well over your estimated watts used. Smaller generators can run quieter while larger generators can sound louder. Small portable generators have smaller gas tanks and run just a few hours while the larger ones have bigger gas tanks which run longer hours.

When selecting a generator, first know what you are going to use it for and what wattage requirements you have. For a more detailed discussion on selecting a generator for your needs, go to www.youcancamp.com/kiporgenerator.php

Here is a link that might be useful: Beginner Camping Tips