Gas vs Diesel Generators


The #1 Fuel for Power Generation Worldwide

Natural gas and propane generators are the most expensive to operate. They come with a very high installation cost and have over five times the maintenance requirements. The life expectancy of a gas engine is under 3,000 hours while diesel is 20,000 hours or more.

Natural gas and propane are extremely flammable. Both must be delivered using underground pipes.  Diesel is safer to store and is only combustible under high pressure and temperature.  Natural disasters such as floods or earthquakes can disrupt the delivery of natural gas or propane. Diesel is readily available during times of emergency. Bio-diesels are also an alternative fuel. 

Natural gas and propane are an excellent fuel source for cooking and heating your home but the worst for power generation.  In a gas engine, the majority of the fuel energy is given off as heat. Less than 30% of the energy ends up producing power to turn a generator. Diesel engines have an efficiency of up to 50%. Also, diesel fuel contains a lot more energy making it the number one choice for power generation worldwide.




Generator Fuel Cost


Suppliers charge for transporting natural gas across the country to storage facilities and again to your home through underground pipes. The charges for delivery often exceed the actual cost of the fuel alone.


The Cost of Natural Gas Generators

New Advanced Diesel Engines. 

Engine efficiency is directly related to its compression ratio. Diesel engines produce the highest compression ratio since its fuel has a high flash point. This means it can only be easily ignited under high temperature and pressure. The result is a very powerful engine design.

With the investment in new diesel technology, diesel engines today are 99% cleaner than they were just ten years ago. With the increased efficiency and removal of sulfur from it, (since 2007) diesel generators now produce near-zero emissions of nitrogen oxide (NOx), hydrocarbons (unburned fuel) and Particulate Matter (PM). It would take 60 engines today to produce the same amount of pollution one engine did a few short years ago.

Quiet - To remain small and produce enough power, gas engines normally run at very high speeds. Most turn at 3600 RPM, a speed your car does not even do on the highway. Diesel produces less noise running at a slower 1800 RPM.

Small and Compact - Diesel generators have come down significantly in size.  The new compact designs allow for easy installation in a variety of applications.

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