A diesel generator is the combination of a diesel engine with an electric generator (often an alternator) to generate electrical energy. This is a specific case of engine-generator. A diesel compression-ignition engine often is designed to run on fuel oil, but some types are adapted for other liquid fuels or natural gas.

Diesel generating sets are used in places without connection to a power grid, or as emergency power-supply if the grid fails, as well as for more complex applications such as peak-lopping, grid support and export to the power grid.

There are a number benefits of using diesel generators, anyhow it is crucial to understand the advantages and disadvantages before thinking of buying diesel generators for home use. Even though one of the core advantages are that they are an economical generation device.

Diesel generators are still a lot more preferred than other types of generators. Many use diesel generators for home use as they have proven to be reliable to power refrigerators, electronic devices and even home medical equipment. Anyhow it is necessary to look at the pros and cons when deciding to go for a diesel generator.