Restroom trailer for October 2026 festival: Generator size for AC?

Question

We're locking in the final details for our October 2026 festival, which is a three-day event. We're expecting a peak of around 2,000 guests per day, with warm afternoons forecast. I've reserved a 4-station restroom trailer that has flushing toilets, sinks with running water, and most importantly, an air conditioning unit to keep it comfortable. The trailer will be placed on a level grass field, but we're a good 300 feet from the nearest power source, so we'll need a generator.

My main concern is sizing the generator correctly to handle the AC compressor kicking in without tripping the breaker. The rental company just asked me what size I want and I don't want to guess wrong. What size generator is typically needed for this kind of setup? Are there specific power requirements I should ask the rental company about for the AC unit itself?

Owen G. · Answer

A 4-station restroom trailer with air conditioning typically needs a 6500-watt to 8000-watt generator to handle the AC compressor startup surge without tripping the breaker. Ask the rental company for the AC unit's exact starting and running wattage, which determines the generator size. The AC compressor draws the most power when it kicks on, so the generator must handle that initial surge. Restroom trailers also power water pumps, interior lights, and exhaust fans, but the AC is the largest load. Place the generator at least 20 feet from the trailer to reduce noise and ensure proper ventilation. Use a heavy-duty outdoor extension cord rated for the full amperage to run power 300 feet to the trailer. Confirm the generator has enough fuel capacity or a refueling plan for three days of continuous operation.

Restroom trailer for October 2026 festival: Generator size for AC?

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