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Coffee Trailer Electrical Planning: What to Know Before You Buy Equipment

The espresso machine is the wrong question

Almost everyone planning a coffee trailer asks what their espresso machine draws. It is a reasonable question and it is not the one that decides your build.

A coffee trailer is power-hungry in a way that surprises people, and the machine is only part of the load. Air conditioning, refrigeration, hot water, water pumps, grinders, lighting, point of sale and whatever else you have added all draw power too. What matters is not what any one of them uses. It is what happens when several of them run at the same time.

That is simultaneous demand, and it is the number that decides whether your trailer works on a hot Saturday with a queue, or trips halfway through the morning.

Why it bites on exactly the day it matters

Your quietest day is not your test. The load peaks when it is hot, when the queue is long, and when everything is working hardest at once: the air conditioning fighting the weather, the refrigeration recovering every time the door opens, the water heater catching up, the machine pulling back to temperature between drinks.

A setup that has been fine for weeks can fail on the first genuinely busy day, which is also the day it costs the most. That is the pattern, and it is why this is a planning problem rather than an equipment problem.

It decides the trailer, not the other way round

Power is one of the decisions that has to be settled early, because so much follows from it. It affects which machine you can run, whether you need a generator and what kind, where things physically sit in the build, and which locations will even work for you. Some venues can power you and some cannot, and finding that out after you have signed for a trailer is an expensive way to learn it.

This is the same argument as the decisions that come before buying a trailer. Electrical is near the top of that list, and it is the one most often left to the build stage, when the options have already narrowed.

What getting it wrong actually costs

• Service interrupted mid-event. Breakers trip with people waiting. You are not serving, and you are being watched not serving.
• Locations you cannot take. A booking you have to turn down because the site cannot power you is revenue you never see.
• Rework. Electrical is behind the walls. Changing it after the build means undoing finished work, which is why this is one of the more expensive things to get wrong.
• Equipment you cannot use. A machine that will not run at full capability on your setup is money spent on capacity you do not have.

The questions to be able to answer before you spend money

You do not need to be an electrician. You do need to be able to answer these before you buy equipment or commit to a build:

• What will actually be running at the same time during your busiest hour?
• Which pieces of equipment are the largest draws, and can any of them be staggered?
• Where will your power come from at each type of location you plan to work?
• What do you need to ask a venue before accepting a booking?
• What do you need from a manufacturer's spec sheet before choosing a machine?
• What does an electrician need from you to do this properly?

If those questions are uncomfortable, that is useful information. It is much cheaper to find that out now than during a build.

Where the actual planning happens

Working those answers out is a process, not a fact to look up. It involves listing every load, calculating simultaneous demand honestly, sizing around the things people forget, deciding what service and what generator capacity your model actually requires, and turning all of it into something you can hand an electrician.

That is what Module 02, Trailer & Equipment covers, with the worksheet to do it on. It is part of the Mobile Coffee Trailer Course and it can be bought on its own.

And when you have a number, take it into the cost of a complete build, because electrical capacity is one of the things that moves that figure most.