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What are the modes of operation for a diesel generator?

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The operation modes are depending on the actual application to what it needs to supply power to. Usually, standalone mode, standby mode, and parallel with the mains in the majority of cases.

What are the differences between the three modes?

In standalone mode, the generator set is the only power equipment. There is no Mains power. The generator set powering to kinds of applications.

In standby mode, the generator sets as emergency standby power when the failure of the mains, the generator set will start work, and connect ATS system will automatically work between the mains and Genset. This is suitable for temporary & short time no power.

In parallel with the mains, the generator set can be used to supply additional power when the incoming supply from the mains is insufficient to meet the load demand. It can also be used to export power to the mains to support the grid. Generators in this mode are often also used for standby in the event of a mains failure.

Ke Wong

Ke Wong

Hey, I’m Ke Wong joined WALT POWER in 2011. I spent a dozen years focused on generator set & load bank technology and solutions for the power & energy industry. WALT Power is a reliable & leading manufacturer & supplier in China, as a business director, I am so proud of our knowledge is more and more popular not only for engineers, and generator distributors but also for end-users. Hope you are enjoying our article, if any questions or comments welcome to send me sales at

Ke Wong

Hi, I’m the author of this post, and also the business director of WALT Power. I have been in this field for more than 17 years. If you want to know more about the generator set or services, please just feel free to contact me any time.

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