That power is easily stored, and used over time, especially if you can't find gas or a battery.
gasoline
The benefits of using a propane generator versus a gasoline generator is that a propane generator is more cost efficient. You will save money on propane use. Gasoline is more expensive. Propane generators are also safer for the environment.
The fuel of a proprane generator is much cleaner than that of a gasoline generator. They are also more cost effective.
A steam turbine/generator in a power station, a small gasoline powered generator, or a 12v alternator in your car driven by the engine.
A hurricane
No, a gasoline generator cannot be used inside unless it is properly vented, this should only be done by a licensed electrician. You can die or become seriously injured from carbon monoxide poisoning.
Nothing "creates" energy. The chemical energy in gasoline can be converted to electrical energy by burning the gasoline in an internal combustion engine that's connected to a generator.
Yes, generators are manufactured that can run on these products. The overlying factor is how large a KVA generator is needed for backup. If a large size generator is needed, the gasoline engine driving the generator may not have enough horsepower to do the job when compared to a diesel engine. Larger gasoline engines consume much more fuel per HP than do diesel engines, if cost is a factor in the equation as to what engine should be used to drive the generator.
The type of gasoline needed would depend on the type of generator being used. Most generators use either regular gasoline, diesel fuel, propane, or natural gas. These types of fuels are very common and can be found locally pretty much anywhere.
A solar power generator produces electricity from sunlight, as opposed generators that use gasoline. The solar units are non-polluting and quiet (gasoline generators are quite noisy!), but they produce far less energy than gasoline generators and require that sunlight be available.
You may buy gasoline online at places such as the Sears website. There are many other different depots which offer gasoline on their website, such as Home Depot and the well known Lowes.
Gasoline/petrol (primary) --------> ac generator and battery(secondary)