Should I choose a “trailer mounted” or a “stationary standby” generator?

It will depend on the flexibility you require for your application.

A stationary standby generator should be used when it can be permanently mounted. They use most types of fuel including diesel, natural gas and propane (LP). Unlike a trailer mounted generator, fuel for stationary standby generators can be sourced from a utility or a large reservoir without the constant need to refill. Stationary generators can be installed so that they automatically start when an interruption of power occurs and shutdown when utility power resumes. Initial costs compared to a trailer mounted unit are typically lower but installation can be 1 to 2x the price of the generator. Stationary generators are typically more secure from theft than a trailer mounted unit.

A trailer mounted generator can be transported to different facilities as the need arises. Trailer mounted generators do not need a foundation like a stationary unit. Since they are not permanently mounted, these types of generators do not have to meet the same building codes, fire codes, etc. as stationary generators. Trailer mounted generators have limited fuel capability and almost all require liquid fuel (diesel). They are typically higher in cost but require little to no installation.

A transfer switch (manual/automatic) mounted at the location where backup power may be required is recommended for quick and easy electrical connection for trailer mounted units.

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