NOT ALL GENERATOR'S ARE THE SAME. This is a common misconception among food truck builders, and owners. Go to any food truck event anywhere in the country, open your car door and whats the first thing you notice? NOISE and lots of it.
In the last few years people have developed generators specifically for food trucks, however like the picture above which is a very quiet generator, it is not made to run a food truck. It is designed to run Rv's over nights, and power low draw electrical systems. This generator is the Honda EU7000 and comes at a very cheap $4,000.00. Although these generators are quiet, there is no way to encase these generators, so you are either wheeling the 250LB's off the truck every single time, or it is mounted on your front bumper... This is a problem either for your back or for your generator and truck.