Determine the amount of power you use. Generators vary in horsepower output. Start by creating a checklist of the appliances that run at 120 volts. Take note that air conditioning units have the highest power consumption and light bulbs have the lowest consumption.
Add the power consumption by watts. Normally, appliances have stickers that display their watt requirements. Calculate the estimated total.
Know how much you are willing to pay for a generator. Remember that there are two types of portable generator; RV or contractor. If you wanted a quality power source, go with RV generators because they provide reliable power and their generators are quieter than contractor generators.
Check whether you want an electric start or a manual start (like a mower) and determine the length of time you want the generator to run. It might take a lot of work if you buy the manual pull. An electric start is more convenient.
Narrow down your options by reading online reviews and testimonials of campers who have used the generator. You can narrow down your options some more by picking your top 3.
Go to an authorized generator distributor and look for a generator that has all the specs you need.
Close the deal and have it delivered or pick it up and have it installed.