The amount of power which your RV generator needs to produced is based on what you plan on using it for. Many of the models which we have discussed can power electrical items as big as an air conditioner but are suitable for all electrical appliances which are smaller than this as well. However, you need to check both the max wattage rating and a running wattage rating to get an idea of exactly what you will be able to power. For example, if you are using a 2200W generator and you are using 2000W of it powering your air conditioner, you only have 200W available for other things. Again, it all comes back to your individual requirements.