At a glance: choosing a generator for a food truck or market stall
- Start with the equipment you need to power, then calculate its combined running and starting wattage.
- Inverter generators can be a good fit for smaller setups with electronic equipment, while higher-output generators may be needed for multiple appliances.
- Petrol generators offer a practical portable power option, particularly when you need to move the generator between pitches.
- Dual-fuel generators give you the flexibility to run on petrol or LPG, which may be useful if LPG is already part of your setup or if you prefer less emissions around your food truck.
- Check noise, runtime, portability and site rules before buying. The highest-output generator isn't necessarily the best choice for your business.
Whether you're serving food from a van, running a coffee trailer or setting up a regular market pitch, reliable power keeps the day moving. Choosing the right generator for a food truck starts with knowing exactly what you need to run, rather than simply buying the biggest generator you have space for.
Your setup might include refrigeration, lighting, a till, coffee equipment or other appliances. Each adds to the electrical load, and some equipment needs extra power when it starts.
Once you know your power requirements, it's much easier to choose the generator type, fuel and features that suit the way you trade.
Start with everything that needs power
A simple stall with lights and a card reader has very different requirements from a catering trailer running several electrical appliances.
Start by listing everything you expect to power from the generator. Check the wattage of each item and work out which ones are likely to run at the same time.
Depending on your setup, that could include:
- Fridges and freezers
- Coffee machines
- Water pumps
- Lighting
- Extraction equipment
- Tills and card machines
- Displays and signage
- Other electrical cooking or preparation equipment
Check the running wattage for each item and add together anything likely to operate at the same time.
Then look for starting wattage.
Equipment with motors or compressors can briefly demand more power when it starts. Refrigeration is a common example. A generator that covers your normal running load may still struggle if it can’t handle those short peaks.
Before choosing a generator, work out the generator size you need based on both running and starting wattage. This helps you avoid ending up with too little power or paying for capacity your setup doesn't need.
Match the generator to the way you trade
Two businesses with the same electrical load can still need very different generators.
A trader moving between markets several times a week may put far more value on weight and easy handling than a catering trailer that stays on one site for several days.
Think about what your normal working pattern looks like.
If you run a smaller stall
A compact setup powering lights, tills, chargers and a small amount of refrigeration may suit a portable inverter generator.
Inverter models electronically process their electrical output and are often designed with portability and lower-noise operation in mind.
They can work particularly well when your electrical load is moderate and you regularly set up close to customers or other traders.
If you run several higher-demand appliances
Coffee machines, larger refrigeration systems, extraction equipment and electrical cooking appliances can increase the load quickly.
At that point, output becomes the priority.
Don’t force a smaller generator to run close to its limit simply because it’s easier to move. Calculate what your equipment actually demands and choose enough rated capacity to cover it comfortably.
If the generator will run for long periods
A full trading day changes the decision again.
Runtime, fuel capacity and refuelling become much more important when the generator will operate for several hours at a time.
For heavier loads or sustained operation, a larger petrol, dual-fuel or diesel generator may make more sense than a compact inverter model.
Petrol, LPG or diesel: which fuel fits your business?
Fuel choice should reflect how you work rather than simply which generator type you normally associate with commercial use.
Petrol
A petrol generator can suit mobile traders who want a wide choice of portable outputs.
If you’re loading and unloading at different markets, pay close attention to weight, wheels and handles as well as wattage.
Petrol and LPG dual-fuel
A dual-fuel generator gives you the choice of petrol or LPG and offers several advantages to using LPG.
That can make sense for catering businesses that already use LPG elsewhere in their setup or want cleaner emissions around their food trucks, and don't want to store smelly, messy petrol.
Check the rated output on each fuel before choosing. Some dual-fuel generators produce less power on LPG than petrol, so size the generator around the fuel you expect to use.
Diesel
Diesel is worth considering when sustained running and heavier electrical loads outweigh portability.
For a lighter market setup that moves regularly, a large diesel generator may add weight and bulk you don’t need.
Commercial use alone isn’t a reason to choose diesel. Your load, runtime and working pattern should decide it.
Plan around the length of your trading day
A generator that can technically power your equipment still needs to do it for long enough.
Look at the manufacturer’s runtime figure, then check the electrical load used to calculate it.
A generator rated for a long runtime at 25% load may deliver considerably less when your equipment is drawing 60%, 70% or more of its available output.
Think about:
- How many hours you normally trade
- How heavily loaded the generator will be
- Whether you can refuel during the day
- How much fuel you need to carry
- Whether stopping the generator would affect refrigeration or other essential equipment
This gives you a much clearer picture than fuel tank capacity on its own.
Don’t overlook noise around customers
A generator working beside a market stall or food truck may run only a few metres from customers and neighbouring traders.
That makes noise part of the customer experience as well as a generator specification.
When comparing models, look at the stated dBA figure and check the distance and operating conditions used to measure it.
A lower figure can be an advantage, but don’t sacrifice output just to chase the quietest model.
Position matters too. Always follow the manufacturer’s requirements for ventilation and clearances rather than moving the generator somewhere unsuitable simply to reduce noise.
Check the pitch before choosing the generator
Your own power requirements are only half of the decision.
Markets, festivals and event organisers can set their own conditions around generators, fuel storage, noise and electrical equipment.
Before committing to a setup, find out:
- Whether generators are permitted
- Where generators can be positioned
- Whether there are noise restrictions
- What fuel-storage rules apply
- Whether the organiser has electrical requirements
- Whether your equipment needs particular testing or documentation
If you trade at several venues, check each one rather than assuming the same rules apply everywhere.
That can save you arriving with a generator you can’t use.
Build safety into the setup
A generator should never be run inside a food truck, van, trailer, gazebo or another enclosed or partially enclosed space.
Generators can produce carbon monoxide, which is poisonous and cannot be seen or smelled.
Operate the generator outdoors and follow the manufacturer’s instructions for ventilation, positioning and clearances. Keep exhaust gases away from people, doors, windows and ventilation openings.
You also need to plan for:
- Safe fuel storage and refuelling
- Suitable electrical connections
- Protection from conditions the generator isn’t designed for
- Keeping customers away from hot or moving parts
- Safe cable routing around your pitch
- Allowing the generator to cool before refuelling where instructed
Work this out before the trading day rather than trying to solve it once customers arrive.
Which generator setup sounds closest to yours?
| Your setup | What to prioritise |
|---|---|
| Small market stall with lighting, tills and chargers | Compact size, easy transport and moderate output |
| Coffee stand with refrigeration and a coffee machine | Starting demand, rated output and runtime |
| Food truck with several electrical appliances | Combined load, starting wattage and sustained output |
| Trader moving between several pitches each week | Weight, handles, wheels and easy setup |
| Catering setup already using LPG | Dual-fuel operation and LPG-rated output |
| Larger setup running for long periods | Runtime, fuel planning and sustained power |
There isn’t one generator that suits every food business. The better choice is the one that matches the equipment and working pattern you already have.
Power your trading day without overcomplicating it
Start with the equipment that has to stay running. Calculate the load, allow for starting demand and then look at the practical side of using the generator throughout a normal day.
That should give you a much clearer answer than starting with fuel type or maximum wattage.
If you’re comparing generators for a food truck, catering trailer or market stall, use our wattage calculator to narrow down your choices and find the perfect generator.
