Refrigerated trailer power One of the first things to sort out when you hire a refrigerated trailer is how you’re going to power it. Here’s a straightforward guide to mains hookups, generators, cable runs, and the practical details most people don’t think about until the day itself.

Once the trailer is booked and the dates are locked in, the next question is almost always the same: “How do I actually plug it in?” It’s a fair question — and one that’s far easier to answer in advance than on the day, standing in a field with a trailer, a catering team, and no working power.

Whether you’re running a wedding at a country estate, a festival in a field, a corporate event in a marquee, or adding extra cold storage to your restaurant during a refit, getting the power side right is what keeps everything else on the rails. Here’s what you need to know.

What kind of power does a refrigerated trailer need?

Most of our trailers run on standard UK single-phase mains electricity. Smaller fridge trailers can usually run from a domestic 13A socket, while larger fridge and freezer units typically need a 16A commando (blue) socket on a dedicated circuit.

In rough terms:

• A 3-metre fridge trailer draws roughly 1–1.5kW when running — well within the limits of a normal household circuit.
• A freezer trailer draws more, typically needing 16A / 3.6kW on its own circuit, particularly when pulling down to temperature from warm.
• Larger or twin-compartment trailers may need a 32A supply or a suitably sized generator.

The startup draw — when the compressor kicks in — is always higher than the running draw, and that’s the figure that matters when you’re sizing cables, fuses, or a generator. Undersized power is one of the most common causes of a trailer that “won’t get cold enough.”

We’ll always tell you exactly what your specific trailer needs at booking stage, so there’s no guessing.

Option 1: Mains power from the venue

If there’s a suitable socket within reasonable distance, mains is usually the easiest, cheapest, and quietest way to run a trailer. A few things worth checking with your venue before the day:

• The socket type. A 13A three-pin socket will run smaller fridge units; anything bigger will need a 16A blue commando socket. Marquee suppliers, farm outbuildings, and event venues often have these fitted — older homes and garden power points rarely do.
• The distance from trailer to socket. Long extension lead runs lose voltage, and an underpowered trailer doesn’t cool properly. If the power point is more than 20–30 metres from where the trailer will sit, flag it in advance so we can bring a suitably rated heavy-duty lead rather than daisy-chaining domestic cables on the day.
• Whether it’s on a dedicated circuit. If the same socket is also running a band, lighting rig, or catering oven, you may trip the breaker at the worst possible moment. A dedicated supply for the trailer avoids that.
• RCD protection and weatherproofing. All outdoor power should be RCD protected, and connections need to be kept dry and off the ground. Simple, but worth confirming in advance.

Option 2: Running on a generator

If you’re in a field, car park, remote marquee, or anywhere else without mains nearby, a generator is the answer. A few things worth knowing before you hire one.

• Size it properly. A generator that’s only just big enough to cover the running load will struggle with the compressor startup, and will either trip out or slowly damage the unit over time. As a rough guide, we’d suggest a minimum of 5kVA for a single fridge trailer, and 7.5kVA or more for a freezer or for two units running together. Your generator hire company will usually advise, but tell them exactly what you’re powering.
• Go for “clean” power. Cheap open-frame builder’s generators produce dirty, spiky electricity that can damage the trailer’s electronics and shorten the compressor’s life. A modern inverter or low-harmonic diesel generator is well worth the extra cost — and most event hire companies now offer them as standard.
• Plan for fuel. A typical small diesel generator burns roughly 1–2 litres of fuel per hour, so a full weekend wedding can easily get through 40+ litres. Have fuel on site, jerry cans topped up, and a safe place to refuel away from guests.
• Think about noise. Generators are a lot quieter than they used to be, but they’re not silent. For weddings, speeches, and anything with live music, position the generator well away from the main guest area and ideally behind a natural sound barrier.

What to plan before the trailer arrives

A short checklist of things worth sorting in advance:

• Confirm the power source and socket type with your venue or event organiser.
• Measure the distance from the power point to where the trailer will sit.
• Decide who’s supplying the cable — we carry standard leads, but very long runs may need specialist hire.
• Turn the trailer on at least two to three hours before loading food, so it’s fully down to temperature before anything goes in.
• Have a backup plan — for a critical event, know who to call if power fails overnight.

Most of this is straightforward. It just needs thinking about before the day, not during it.

What does it actually cost to run?

Running costs are one of the things people often overestimate. On mains, a refrigerated trailer typically costs somewhere around £2–£5 per day in electricity, depending on the size of the unit, the outside temperature, and how often the doors are being opened.

On a generator, the main cost is fuel — budget roughly £30–£50 per day in diesel for a small generator running flat out, plus the hire cost of the generator itself. That’s worth factoring in when comparing venues with and without mains power.

We’ll help you work out what you need

Power is one of those things that’s simple when it’s planned and a nightmare when it isn’t. If you’re not sure what supply you’ve got, what socket you’re looking at, or whether a generator is the better option for your site, just give us a ring. We’ve seen most setups before and can usually work it out in a five-minute conversation.

We cover Cheshire, Manchester, North Wales and the wider North West, and we’d always rather spend a few minutes up front getting the setup right than have the trailer arrive and find out it can’t run properly.

Call us on [phone number] or [get in touch via our contact page] and we’ll help you plan the power side of your hire properly.

Read more: Hiring vs Buying a Refrigerated Trailer: Which Makes More Sense?

Read more: How much fridge/freezer space do I need for my event?

Hiring vs Buying If you’re regularly using cold storage for events, catering, or your business, you’ve probably wondered whether it’s worth buying your own trailer outright. Here’s an honest breakdown of when hiring makes sense, when buying does, and the costs most people don’t think about.

It’s a fair question. If you’re hiring a refrigerated trailer several times a year, the numbers start ticking over and at some point buying your own feels like the obvious move. But the upfront price tag is only part of the picture. Once you factor in everything that comes with owning a trailer, the answer isn’t always what you’d expect.

The true cost of buying

A new refrigerated trailer typically costs somewhere between £8,000 and £20,000+ depending on the size, spec, and manufacturer. That’s a significant outright investment, but the purchase price is just the beginning. Here’s what else you’re taking on.

• Storage. A 3-metre refrigerated trailer needs somewhere to live when it’s not in use. If you don’t have yard space or a secure compound, you’re looking at monthly storage fees — which can easily run to £50–£150 per month depending on your area. Over a year that’s up to £1,800 before you’ve even used it.
• Maintenance and servicing. Refrigeration units need regular servicing to keep running efficiently — compressor checks, gas top-ups, electrical inspections, seal replacements. Budget for at least one annual service, and be prepared for unplanned repair bills. A compressor failure alone can cost £1,000+ to fix.
• Insurance. You’ll need specialist trailer insurance, which varies depending on the value and how you use it. Expect a few hundred pounds a year at minimum.
• Cleaning and hygiene. If you’re storing food, the trailer needs to be thoroughly cleaned and disinfected between uses to meet food safety standards. That’s your responsibility as the owner — either your time or a professional cleaning cost each time.
• MOT and road compliance. Trailers over 3,500kg require an annual MOT. Even lighter trailers need to be roadworthy with working lights, brakes, tyres, and couplings. Tyres alone can cost £100–£200 each to replace.
• Depreciation. Like any vehicle, a refrigerated trailer loses value over time. After five years of use, you may find it’s worth significantly less than what you paid — especially if it’s been used hard or stored outdoors.

Add all of that up and the real annual cost of owning a trailer can easily reach £3,000–£5,000 per year on top of the purchase price.

The case for hiring

When you hire, all of those ownership costs disappear. You pay a fixed daily or weekly rate, and that’s it. With us, the price includes:

• Delivery to your site — we bring the trailer to you and position it where you need it.
• Setup — plugged in, switched on, set to your required temperature.
• Collection — we pick it up when you’re done.
• Cleaning — every trailer is cleaned and disinfected between hires.
• Insurance — covered during the hire period.
• Maintenance — if anything goes wrong, it’s our problem, not yours.

There’s no storage to worry about, no servicing schedule, no depreciation eating into your investment. You use it when you need it and hand it back when you don’t.

So when does buying actually make sense?

Buying starts to make financial sense when you’re using a trailer frequently and consistently — typically several days a week, year-round. If you’re a butcher, a caterer with daily deliveries, or a food production business that needs permanent additional cold storage on site, owning your own unit can work out cheaper in the long run.

But even then, it only makes sense if you also have somewhere to keep it, the budget for ongoing maintenance, and the time to manage the upkeep.

For most people — and especially for event use — the maths doesn’t stack up. Here’s why.

The maths for event and seasonal use

Say you hire a trailer six times a year for events — weddings, festivals, Christmas parties, the odd emergency. At a typical hire rate, you might spend somewhere in the region of £1,500–£2,500 across the year, depending on how long each hire runs.

To break even on a £12,000 trailer purchase, you’d need to factor in the purchase price plus the annual running costs. Even at a conservative estimate of £3,000 a year in storage, insurance, maintenance, and cleaning, it would take well over five years to reach the point where owning is cheaper than hiring — and by then the trailer is ageing, the refrigeration unit may need replacing, and the resale value has dropped.

For seasonal or occasional use, hiring wins on cost almost every time.

Beyond the money

There are a few non-financial advantages to hiring that are easy to overlook.

• You always get a well-maintained unit. Our trailers are checked, cleaned, and serviced between every hire. When you own a trailer that sits unused for months at a time, seals can perish, batteries can go flat, and refrigeration units can develop faults that only show up when you need the trailer most — typically the night before a big event.
• You can scale up or down. Hiring one trailer for a garden party and two for a festival is simple. If you own one trailer and a bigger job comes along, you’re stuck.
• No long-term commitment. Your needs might change. If you’re testing the waters with event catering or adding cold storage to your business for the first time, hiring lets you figure out what works before committing thousands of pounds.

A middle ground: hire first, buy later

If you’re seriously considering buying, we’d actually suggest hiring from us a few times first. You’ll get a feel for the size and spec that works for your situation, how often you genuinely need a trailer, and what the practical realities of using one are like — access, power supply, positioning, all the things that only become obvious once you’ve done it for real.

If you do decide to go ahead and buy, you’ll make a much better-informed purchase. And if you realise hiring suits you better, you haven’t sunk £10,000+ into finding that out.

Not sure which way to go?

We’re always happy to have an honest conversation about whether hiring is the right option for you. We’d rather give you straight advice than talk you into something that doesn’t fit — that’s how we’ve built our reputation across Cheshire, Manchester, North Wales and the North West.

Call us on [phone number] or [get in touch via our contact page] and we’ll help you work out what makes sense for your situation.

Read more: Powering a Refrigerated Trailer at Your Venue: Mains, Generators, and What You Need to Plan

Fridge freezer space One of the most common questions we get asked is “how big a trailer do I need?” The answer depends on a few things: how many guests you’re feeding, what type of food and drink you’re storing, and how long the event runs. Get it wrong and you’re either cramming things in and risking food safety, or paying for space you don’t use.

Here’s a straightforward way to work it out.

Start with your guest count

As a rough guide, you need around 0.1 cubic metres of refrigerated space per 10 guests for a standard catered event — a wedding reception, birthday party, or corporate function where food and drinks are being served across a few hours.

That means:

• 50 guests → around 0.5 m³
• 100 guests → around 1.0 m³
• 150 guests → around 1.5 m³
• 200+ guests → around 2.0 m³ or more

Our 3-metre trailers offer approximately 10.3 cubic metres of internal capacity (3.0m x 1.75m x 1.97m high), so even for large events a single trailer will usually be more than enough. For smaller gatherings like garden parties or family celebrations, you’ll have plenty of room to spare — which is no bad thing, because you can organise everything properly with shelving rather than stacking trays on top of each other.

Factor in what you’re storing

Not all food and drink takes up the same amount of space, and some items need more careful handling than others.

• Drinks are the biggest space hog. Cases of beer, wine, soft drinks, and bottled water stack well but they’re heavy and bulky. If you’re running a bar for 100+ guests over a full day, drinks alone can fill half a trailer.
• Platters, trays, and buffet items need room to lie flat. You can’t stack a tray of canapés three deep without ruining them, so shelving is essential here. We can supply our trailers with shelving down one or both sides at no extra charge — it makes a huge difference to how much usable space you get.
• Raw ingredients for on-site cooking (hog roasts, BBQs, festival food stalls) tend to be more compact but need reliable temperature control. Our trailers can be set anywhere from chilled to frozen using the electronic temperature control, so you can store fresh meat, dairy, and desserts safely throughout the day.
• Ice and frozen items — if you need both chilled and frozen storage at the same event, you may need to think about two separate units, or plan your timings so frozen items go in first at a lower temperature before you switch to fridge mode for the rest. Give us a call and we can talk through the best setup for your situation.

Think about access and flow

It’s not just about total volume — it’s about how easily your caterers can get in and out during service. A trailer that’s technically big enough but packed to the ceiling is a nightmare when you need to grab a tray of starters mid-service.

A few practical tips:

• Leave space near the doors for items you’ll need first or most often.
• Use shelving to keep things organised by course or type — starters on one side, desserts on the other, drinks at the back.
• Don’t block the full width of the trailer. Keep a narrow aisle down the middle so someone can walk in and reach everything without unpacking half the trailer.

Our trailers have full-width double rear doors, an internal light, and a slip-resistant floor, so loading and unloading is straightforward even in the dark or the rain.

Consider the length of your event

A three-hour afternoon reception is very different from a two-day festival or a wedding that runs from noon until midnight. The longer the event, the more you need to think about:

• Restocking — will you need deliveries during the event that need to go straight into cold storage?
• Temperature recovery — every time the door opens, warm air gets in. Over a long event with frequent access, a larger trailer holds its temperature better than one that’s packed tight.
• Overnight storage — if the event spans two days, you’ll need the trailer running overnight. Our units simply plug into a standard 13amp or 16amp socket (or a generator for remote locations), so there’s no fuel cost or engine noise to worry about.

A quick sizing guide

Here’s a practical summary to help you get a rough idea before you call us:

Event type	Guests	Recommended space	One of our 3m trailers?
Garden party / BBQ	30–50	0.3–0.5 m³	More than enough
Birthday / anniversary	50–80	0.5–0.8 m³	Plenty of room
Wedding reception	80–150	0.8–1.5 m³	Comfortably covered
Corporate event / gala	100–200	1.0–2.0 m³	Covered with room to organise
Festival / multi-day event	200+	2.0+ m³	May need multiple trailers

Bear in mind these are estimates for food and drink combined. If you’re storing drinks separately (in a bar area with its own cooling, for example) you can scale down.

Still not sure? Just ask us

Every event is different, and we’d rather you called us for a quick chat than guessed and got it wrong. We’ve supplied trailers for everything from small family parties to large outdoor festivals across Cheshire, Manchester, North Wales and the wider North West — so we’ve seen most situations before and can give you honest advice on what you actually need.

We’ll deliver the trailer to your venue, set it up, and collect it when you’re done. No stress, no fuss.

Give us a call on [phone number] or [get in touch via our contact page] to chat through your event.

Read more: Powering a Refrigerated Trailer at Your Venue: Mains, Generators, and What You Need to Plan