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Restroom trailer for a 2026 winter wedding: what size generator for the heater?

Nina R.asked 3 viewsRestroom TrailersRestroom trailerGeneratorWinterizationEvents and weddingsWinter wedding

We're planning our wedding for October 26, 2026, at a rural venue outside Nashville. The ceremony and reception are entirely outdoors, and we've booked a four-station restroom trailer for our 120 guests. The event will run from 2 PM until about 10 PM. Since it's late fall, the trailer's heating system is a must-have. The rental company confirmed the trailer has an electric heater but said we are responsible for providing the power. They'll place it on a flat gravel area, and a vacuum truck can drive right up to it for service. Now I need to rent a generator and don't want to get the size wrong. How many watts should a generator have to reliably run the heater, lights, and flushing mechanisms for a trailer this size all evening? Does the outdoor temperature make a big difference in the power requirement?

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Jules T.Sacramento, CA

A four-station restroom trailer requires a generator rated for at least 4000 to 5500 watts to power its heater, lights, and flushing mechanisms reliably. The outdoor temperature significantly impacts the power requirement, as the heater must work harder in colder conditions to maintain a comfortable interior temperature. Check the specific wattage ratings of the trailer's heater and other components with your rental company, as models vary. Always choose a generator with a continuous wattage output that exceeds the total calculated load, and ensure it has sufficient fuel capacity for the entire eight-hour event. Place the generator downwind and at a distance to minimize noise disruption during your wedding.

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