Portable generators are cheaper for the most part in order to home standby systems as well as need professional guidance installing these folks. They run on various types of fuel but professional compensation models win back their fuel originating from a tank, which limits the gap of time they can be run, usually 10 hours or less. There are some models (expensive) that can be hooked into a third party fuel source though.
Fuel is undoubtedly the the very first thing in generator rentals. You must know what kind of fuel the equipment takes. Does it boast gas, propane or Diesel Generator set fuel? You will need a safe, approved, portable container to keep fuel. Plastic gas containers should have a fire safety shield which prevents explosions by ignited fumes that enter the can. Furthermore, a good can will have a spill proof nozzle, special seals that reduce evaporation and vapor, child-proof design no secondary vent holes. Newer cans most of the time all of these improvements and more.