Gorilla Power GP5500E-DF Dual Fuel Generator Review: Is It Right for Your Mobile Catering Setup?

Running a food van or trailer means relying on a generator that will start every morning, power everything you need, and keep going for an 8-hour trading day without drama. The Gorilla Power GP5500E-DF is one of the few generators on the market that ticks the boxes mobile caterers actually care about: enough power for serious cooking equipment, dual fuel so you can run it on the propane you already carry, and electric start so you’re not yanking a recoil cord at 6am in the rain.

This guide breaks down the GP5500E-DF’s real specifications (pulled directly from the manufacturer manual, not a product listing), explains what it can realistically power in a mobile catering setup, and helps you decide whether it’s the right generator for your trading format. If you’re comparing multiple generators, our main generator buying guide covers the full range.

GP5500E-DF Technical Specifications (From the Manufacturer Manual)

These specs come directly from the Gorilla Power instruction manual — not a reseller listing, not estimated, not rounded. This matters because getting the wrong generator for your setup costs money and downtime.

Why Dual Fuel Matters for Mobile Caterers

Most generators run on petrol only. The GP5500E-DF runs on both petrol and propane — and for mobile caterers, that’s a significant advantage. Here’s why.

You already carry propane. Every mobile catering setup uses propane for cooking — your LPG hob, fryer, and griddle all run on it. Running your generator on the same fuel means one less thing to source, store, and carry. No jerry cans of petrol sloshing around in the back of your van.

Propane is up to 50% cheaper to run. According to Champion (who pioneered dual fuel technology in portable generators), propane can deliver up to 50% cost savings compared to petrol. It also produces up to 50% fewer CO₂ emissions — which matters if you’re trading at events with environmental policies.

Propane doesn’t go stale. Petrol degrades over time and can clog carburettors if the generator sits unused between events. Propane doesn’t decay, doesn’t leave residue, and doesn’t block fuel lines. If you only trade at weekends or seasonally, this alone justifies dual fuel.

Longer run times on a propane bottle. A standard 19 kg propane bottle will run a dual fuel generator for significantly longer than the equivalent petrol tank — in some setups, up to 34 hours at 25% load. That’s multiple trading days from a single bottle.

The petrol option is still there as a backup — useful if you run out of propane mid-event and need to keep trading. But day to day, most dual fuel caterers run on propane exclusively.

What Can the GP5500E-DF Power in a Mobile Catering Setup?

The GP5500E-DF delivers 5,500 watts peak and 5,000 watts continuous. That sounds like a lot — but mobile catering equipment is hungry, and you need to know exactly what fits under that 5,000W ceiling before you commit.

Here is a realistic breakdown of what common mobile catering appliances draw:

Typical LPG-based setup (fryer + griddle + bain marie + fridge + lights + till): roughly 400–800W total. The GP5500E-DF handles this without breaking a sweat — you are using barely 15% of its capacity. This is the sweet spot for most burger vans and food trailers running LPG cooking equipment.

Add a dual fuel coffee machine: now you are looking at 2,000–3,300W. Still well within the 5,000W continuous rating. This is why the GP5500E-DF is popular with traders who run a coffee sideline alongside their main food offer.

Where it gets tight: if you are running multiple high-draw electric appliances — say a coffee machine, a microwave, and an electric waffle maker simultaneously — you could hit 4,500–6,000W. That exceeds the continuous rating. Either stagger your usage or step up to the GP6500E-DF or GP8300E-DF.

The golden rule: add up your continuous draw and keep it under 4,000W to leave headroom for startup surges, especially from the fridge compressor.

Who Is This Generator For?

The GP5500E-DF sits in a specific niche. It is too heavy for a one-person market stall operation but perfectly sized for a dedicated food van or trailer setup where it lives permanently mounted or strapped to a platform.

Ideal for:

• Burger vans and food trailers — running LPG cooking equipment with electric ancillaries (fridge, lights, till, card machine). The dual fuel option means you are already carrying propane for your fryer and griddle, so connecting the generator to the same supply simplifies everything.
• Coffee and food combos — if you run a dual fuel coffee machine alongside LPG cooking, the 5,000W continuous is enough for both without oversizing.
• Event caterers — weekend festivals, private hire, sporting events. The electric start and remote control mean you can fire it up without climbing out of the van, and propane gives you predictable fuel costs you can budget per event.
• Semi-permanent pitches — industrial estate layby, burger van pitch, or regular market spot where noise and fuel logistics matter.

Not ideal for:

• One-person pop-up stalls — at 91 kg, you are not carrying this to a farmers’ market and back. Look at the GP2000i (21 kg) or GP3500i (21.5 kg) instead.
• Noise-sensitive venues — open-frame generators are louder than inverter models. If you are trading at a quiet village fête or craft fair, an inverter generator like the GP5000i or GP8000iE will be quieter.
• Solely electric cooking setups — if everything in your van is electric (induction hobs, electric fryers, electric ovens), 5,000W will not cut it. You need 8,000W+ and should look at the GP8300E-DF.

GP5500E-DF vs Other Generators in the Gorilla Power Range

Choosing a generator is about matching output to your actual load — not buying the biggest one you can afford. Here is how the GP5500E-DF compares to its siblings:

The GP5500E-DF and GP6500E-DF are very similar — same frame, same fuel tank, almost identical weight. The GP6500E-DF gives you an extra 1,000W for about £50-80 more. If you are on the fence between the two, the 6500 is the safer bet — the extra headroom costs very little and could save you from overloading on a busy service.

If weight matters more than output — say you need to lift the generator in and out of a van regularly — the GP8000iE is worth considering. At 64 kg it is 27 kg lighter than the GP5500E-DF despite producing 50% more power, though you lose the dual fuel option and pay more upfront.

Maintenance and Running Costs

Generators are mechanical — they need looking after. The GP5500E-DF uses a 389cc OHV engine, which is straightforward to maintain but not something you can ignore.

Routine Maintenance Schedule

Fuel Consumption and Costs

Running costs depend on which fuel you use and how hard the generator is working. At 50% load (2,500W continuous — a typical mobile catering scenario with LPG cooking equipment):

• Petrol: approximately 1.2-1.5 litres per hour. At current UK prices (~£1.40/litre), that is £1.68-2.10 per hour.
• Propane: approximately 0.8-1.0 kg per hour. A 13 kg propane cylinder costs around £30-35 and gives you roughly 13-16 hours of running time. That works out to £1.90-2.70 per hour — but with the convenience of using the same fuel as your cooking equipment.

Over a typical 8-hour trading day at half load, expect to spend £13-17 on petrol or £15-22 on propane. The real saving with propane is not necessarily per-hour cost — it is logistics. You are already carrying propane cylinders for your fryer and griddle, so you do not need a separate trip to fill jerry cans with petrol.

Storage tip: if the generator sits unused for more than 2-3 weeks, either run the petrol tank dry or add fuel stabiliser. Stale petrol gums up carburettors and is the number one cause of generators failing to start after storage. Propane does not have this problem — another reason dual fuel suits seasonal traders who might not use the generator every week.

Frequently Asked Questions

Can I run the GP5500E-DF on propane all day without switching to petrol?

Yes. The GP5500E-DF runs entirely on propane with no need to switch fuels during a trading day. You connect a standard UK propane regulator (37 mbar) to the LPG inlet, and the generator runs continuously until the cylinder is empty. A 13 kg cylinder gives roughly 13-16 hours at half load — more than enough for a full trading day. Many mobile caterers run exclusively on propane and never put petrol in the tank.

How loud is the GP5500E-DF compared to an inverter generator?

The GP5500E-DF is an open-frame conventional generator, which means it is noticeably louder than an enclosed inverter model. Expect around 74-78 dB at rated load — roughly the volume of a vacuum cleaner at close range. By comparison, the inverter GP5000i runs significantly quieter. If noise is a deal-breaker for your trading location, an inverter generator is a better choice. If you are on an industrial estate pitch or at a busy outdoor event, the noise difference is unlikely to matter.

What propane regulator do I need for the GP5500E-DF?

You need a standard UK propane regulator set to 37 mbar — the same type used for commercial catering appliances. The generator comes with a propane hose and connector, but check that your regulator matches the cylinder valve type you are using (POL fitting for bulk cylinders, clip-on for Calor patio cylinders). Use a propane-rated hose, not a butane one, and check all connections with leak detection spray before first use.

Is the GP5500E-DF suitable for sensitive electronics like a card machine or coffee grinder?

The GP5500E-DF is a conventional (non-inverter) generator, which means its power output has more harmonic distortion than an inverter model. For most mobile catering equipment — fridges, lights, tills, card machines — this is fine. However, if you are running sensitive electronics that specifically require clean sine wave power, or if you notice interference on your card terminal, consider adding an inline power conditioner (around £30-50) or stepping up to an inverter generator like the GP8000iE.

How do I switch between petrol and propane on the GP5500E-DF?

The GP5500E-DF has a fuel selector switch on the control panel. To switch fuels: turn off the generator, move the selector to your chosen fuel (petrol or LPG), ensure the relevant fuel supply is connected and open, then restart. You cannot switch fuels while the engine is running. In practice, most mobile caterers pick one fuel and stick with it for the whole trading day — there is no advantage to switching mid-service.

What is the warranty on the GP5500E-DF and what does it cover?

Gorilla Power generators typically come with a manufacturer warranty covering defects in materials and workmanship. The exact terms and duration should be confirmed at the point of purchase. The warranty does not cover wear items (spark plugs, air filters, oil), damage from improper fuel use, or failure to follow the maintenance schedule in the instruction manual. Keep your purchase receipt and register the product if required by the manufacturer.

Can I permanently mount the GP5500E-DF in my food van or trailer?

Yes, and many traders do. At 91 kg, the GP5500E-DF is heavy enough that permanent mounting makes sense — you do not want this sliding around during transit. Use a steel mounting plate with anti-vibration mounts, and ensure the exhaust vents away from the serving area and any LPG cylinders. The generator must have adequate ventilation — never run it in an enclosed space. If mounting inside a trailer, the compartment needs ventilation openings and the exhaust must exit to the outside. Check with your insurance provider that your installation meets their requirements.