Are there advantages of propane generators compared with diesel?

Yes. Compared with diesel, propane has many significant advantages. The indefinite shelf life of propane makes it an ideal fuel for generators, whereas diesel degrades over time and might not be ready when the power goes out. Propane also burns cleaner than diesel and can be stored onsite, either above or below ground, without risk of ground or groundwater contamination. Diesel, on the other hand, has the potential for contamination from spills and leaks that are retained in the soil.