A wide variety of fuels are used to power generators. The most common are gasoline, diesel, propane and natural gas. With such a wide array of options, the house owner's choice of fuel and the right type of generator will depend upon factors such as the availability of fuel and the frequency of the use.
Gasoline generators
Gasoline generators are the most familiar type of generator. The fuel is readily available and is relatively inexpensive. The power per weight unit in a gasoline-powered generator is also more than other type of generators. Gasoline generators are less expensive than generators that use other fuel sources. However their price depends upon the components used. Multi cylinder, water-cooled engines are qualitatively superior and are priced high. These generators, unlike the cheaper, single cylinder, air cooled engines produce less noise and operate with a steady temperature. Some generators come loaded with features like overhead valves, low oil shut down, high temperature shutdown and electric starter. Engine speed and the type of alternators used also determine the life of the generator
There are certain disadvantages using gasoline generators. Gasoline has a very short shelf life of approximately six months. Fuel stabilizers have to be added to keep the fuel from getting unusable. Gasoline is highly inflammable and storing gasoline for long duration of time can be extremely dangerous. Gasoline generators require frequent maintenance and there is the problem of condensation occurring in cold weather. Gasoline forms gum deposits especially in cold weather and can cause problems in fuel filters and carburetors if the generator is not run often.
The generators are available in 3KW to 15KW and more. The minimum cost of home generators in the range of 3KW to 5 KW is approximately 0 to 00.
Natural gas generators
Most standby or permanent generators are powered by natural gas. It is the most convenient source of fuel and normally available at all times. Natural gas supplied through home gas lines can be conveniently piped to the generator eliminating the inconvenience of refueling and the risk of storing the fuel. In areas where natural gas is available, using a natural gas fuelled generator is a better choice. The generator lasts longer, requires less maintenance and burns cleaner. The engine produces less noise than diesel or gasoline powered generators
Propane gas generator
Propane gas is normally used for permanent standby generators or in places where there is an availability of fuel supply. For house owners who already have a storage tank of around 150 to 200 gallons, propane generators are the best choice. These generators require less maintenance. There is no problem starting them up or condensation in cold weather. Propane gas has a longer shelf life and burns cleaner. The disadvantage of propane is that it is relatively expensive and is less efficient, producing less energy per unit volume than diesel. A 10KW to 12KW generator is sufficient to power a normal sized home. A 12KW propane or natural gas generator may costs 00 upwards.
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