Onlyfire 3-Brenner Grillwagen

A stainless steel folding grill with three burners

The main Amazon image shows a silver grill box on a black X-frame. The lid is open and has a bow handle on top, with a grate of bars underneath. Three control knobs sit on the front, and a single shelf sticks out on the left. The four struts of the frame cross beneath the body, and two wheels run at one end. This cart has no lower cabinet, no lower shelf and no compartment for the gas bottle.

On Amazon, the grill cost €249.99 on 21 October 2026, so approx. €250. In our overview of gas grills, it is one of the small three-burner models that are more reminiscent of a tabletop grill on legs than of a classic grill cart.

Onlyfire sells the unit in its own shop on a shared page in two versions: as the GS307 for the table and as the GS308 with a cart, each with a pressure regulator for the USA, for Germany or for Great Britain. We assign the Amazon version to the GS308 because grate size, output, frame and photo match. However, the manufacturer’s page has no link to this Amazon number. The assignment is therefore our conclusion from the data, not information from Onlyfire.

What Onlyfire states about burners, grate and dimensions

Onlyfire states the output the way it is usual in the US market: 24,000 BTU for all three burners together. The 7 kW comes from the Amazon title. Both values fit together, as 24,000 BTU per hour corresponds mathematically to 7.03 kW. Each burner has its own knob and, according to the manufacturer, can be adjusted independently of the others.

The grate measures 22 × 13 inches, and in metric Onlyfire gives 56.5 × 34 cm. It is made of SUS304 stainless steel, the Japanese designation for the chromium-nickel steel known in Germany as V2A or 1.4301. The data sheet lists 286 square inches as the cooking area. Converting that to square centimetres gives two slightly different figures: around 1,920 cm² from the metric grate size, and around 1,845 cm² from the 286 square inches. The reason is rounding, since 22 inches is exactly 55.88 cm and 13 inches is 33.02 cm. The metric figure is therefore slightly more generous than the inch figure. Neither the photo nor the parts list shows a warming rack.

For the construction, Onlyfire writes only stainless steel in general terms, without distinguishing between body, lid, burners and frame. Amazon describes the unit with 3 burners as stainless steel in general terms, without naming a component; the side shelf is made of stainless steel according to Amazon. The frame is black in the picture, and its material remains open.

Ignition is electronic, as the manufacturer states. Amazon speaks of an electric twist-start ignition, so presumably a rotary knob that triggers the spark when you turn it on. The parts list also includes a thermometer, and the Amazon description mentions a temperature gauge. According to Onlyfire, the lid can be locked. Underneath, a removable tray catches the grease.

In two places, the Amazon text deviates from the unit in the photo. Several bullet points speak of a griddle, and the grease catcher is described as an oil opening with a container at the back. Both correspond word for word to the description of the plancha sister model GS310. The title and image, on the other hand, show a grate, so we consider these bullet points to be carried-over text.

With the cart, the grill measures 16.2 × 23.6 × 38 inches (depth, width, height) according to Onlyfire, which converts to roughly 41 × 60 × 96.5 cm. Amazon gives 35.5 × 87.5 × 97 cm. A width of 60 cm would be only 3.5 cm more than the grate itself, which hardly fits a body with side walls and an unfolded shelf. We suspect that the 87.5 cm includes the shelf, and we would plan with that value. The weight of the cart version is 48 lbs, so around 21.8 kg.

According to the parts list, the delivery includes the grate, the thermometer, a handle, three knobs, the grease catcher, folding legs, a latch, and the pressure regulator with hose and adapter.

What the manufacturer leaves open

An instruction manual is linked neither on the product page nor on the support page. The following is therefore missing:

• Output per burner and a separate kW figure
• Gas pressure in mbar, gas category and hose length of the German regulator version
• Gas consumption per hour
• Material of burners, lid and frame in detail, as well as the sheet thickness
• Maximum temperature, heat-up time and the scale of the thermometer
• Whether the ignition needs a battery
• Dimensions when folded
• Minimum clearances, set-up rules and a statement on balcony use
• Cleaning instructions

In detail: three zones across 56 centimetres

On gas grills of this design, three knobs on the front usually mean three burners running from front to back. Each then heats roughly a third of the grate width, so here a strip of just under 19 cm. Onlyfire describes exactly this layout as an advantage: high, medium and low heat at the same time, plus direct and indirect grilling.

Direct means the food lies over the flame. Indirect means one burner stays off, the meat lies over it, and the heat comes from the neighbouring zones, circulating under the closed lid. On a 56.5 cm wide grate, a third remains for the cool zone. That is enough for two chicken legs or a piece of pork belly, but not for a large roast. That a grill with only one burner cannot achieve this separation in the same way is the most important difference from the Weber Q 1200N further below. How the two methods work together is explained in our guide on direct and indirect heat.

What is revealing is how much output reaches each square centimetre of grate. For the Onlyfire, it is 7 kW over around 0.19 m², which gives about 37 kW per square metre. The Weber Spirit II E-310 also has 7.0 kW, but spreads it over 2,314 cm² of main grate, so around 30 kW per square metre. The Weber Q 1200N, with 2.93 kW over 1,290 cm², comes to just under 23.

This calculation only says something about the rated output, not about the temperature at the grate. How much of it arrives also depends on how tightly the lid closes, how thick the sheet metal is and how strongly the wind draws through the combustion chamber. Our assessment: for three burners on this area, the output is rather generously dimensioned. Whether the unit also heats evenly cannot be read from the figures.

Which gas bottle fits the Onlyfire?

For Germany, a standard propane bottle on the German regulator, which Onlyfire sells as its own variant. Which fill size the manufacturer intends is answered on its page only for the US market: there, a 1-pound cartridge and a 20-pound bottle are meant to fit.

Converted, that is around 0.45 kg and around 9.1 kg. In Germany, 5 and 11 kg are the usual fills. Whether the German regulator also accepts cartridges cannot be seen from the data. For gas grills on the German market, regulators with 50 mbar are usual; a confirmation for this model is missing.

According to Amazon, the gas regulator controls the gas flow from the bottle to the grill. As described above, the cart has no compartment for the bottle, so it stands next to it on the floor. As a general rule: upright, in the shade and so that the hose is neither under tension nor lying on hot parts.

How long a fill lasts can only be estimated. Propane delivers around 12.9 kWh per kilogram. With all three burners running at 7 kW, they consume roughly 0.55 kg per hour. An 11 kg bottle would then be empty after a good 20 hours at full load, a 5 kg bottle after a good 9. Usually not all burners run at the highest setting, so these values are a lower limit for the running time. More on bottle sizes is in the guide gas bottle for the grill.

What else comes into question?

The prices come from our price boxes and change constantly in retail. The ratings are our editorial assessment based on the manufacturer data; we did not have any of the four grills in hand.

When this grill fits and when another one does

First, the area where it is to stand. With the shelf, you need, according to Amazon’s dimensions, just under 90 cm of width and a good 35 cm of depth, plus room for the bottle and the hose. On a small patio that works, but in a corner between a wall and a railing it gets tight, because the bottle does not disappear into the frame.

Then the question of whether the grill stays put or is moved constantly. The folding frame with two wheels is built for the second case: fold it together, put it against the wall, unfold it again next time. Judging by the photo, you roll it like a sack truck by lifting the side without wheels. At 21.8 kg, though, you will not carry it far. The Burnhard Jones weighs 7.3 kg, runs on cartridges and costs approx. €187 (the Onlyfire approx. €250). However, it has only two burners and a much smaller area. If you go tent camping, you are more likely to take it; if you shuttle between garage and patio, more likely the Onlyfire.

On the question of zones, the Onlyfire is ahead of the Weber Q 1200N with stand. The Weber stands at approx. €499 (on 21 October 2026 only from marketplace sellers on Amazon) and has only one burner. In return, it comes with a German manual, and according to the manual, Weber gives five years each against rust-through or burn-through on the grill chamber, lid, burner tubes and grates, and two years on the paint finish of the grill chamber and lid. We would pay the extra if you mostly grill for two and cook sausages, steaks and vegetables directly over the flame.

If you regularly grill for a larger group and have a permanent spot, you end up with the Weber Spirit II E-310. It costs approx. €460 (the Onlyfire approx. €250), and at the same rated output has a good fifth more main grate plus 580 cm² of warming rack. At 44.5 kg, though, it is no longer a unit that you put away after every grilling evening.

On top of the purchase price, all four need the gas bottle or the cartridges, and the Onlyfire also needs the separately sold cover. If you are still torn between designs, work through the questions in the grill finder.

Accessories, spare parts and service

Onlyfire has a replacement grate for the GS307 and GS308 in its range: stainless steel, 22 × 13 inches. In the manufacturer’s shop, however, it is enabled only for the American and Canadian markets. Burners, knobs, igniters and regulators do not appear there as individual spare parts.

For a grill that is meant to stand outdoors for several years, this is the point with the biggest question mark. If a burner fails after a few years, then as things stand today, the only route with the Onlyfire is customer support, which the manufacturer offers by email.

Behind the name is a company with several brands. Besides Onlyfire itself, the company page names the sub-brands Mimiuo, Onlyfire Grills, Onlyfire Outdoor Living and Onlyfire Chef. Where the company is based and where the grill is built is not stated there.

Cleaning and safety while no manual is available

Because we cannot quote a manual, only rules that apply to every liquefied gas grill are given here. They do not replace what Onlyfire itself prescribes.

As a general rule: a gas grill is used only outdoors, never in a garage, tent or motorhome. Before the first ignition and after every bottle change, you check all connections with leak-detection spray or soapy water; if bubbles rise, the gas stays off. Ignite with the lid open. Only empty the grease tray when it is cold, and close the gas bottle at the valve after every grilling session.

There is no manufacturer guidance on brushes for the SUS304 grate. Stainless steel tolerates mechanical cleaning better than enamel, which can chip with hard wire brushes. How you keep the grate, burner tray and burners clean in general is covered in the guide cleaning a gas grill.

If the box contains a manual, its information on clearances, pressure and care takes precedence over everything said here.

Who is it suited for?

Onlyfire itself names the garden, camping and the motorhome as places of use, and Amazon adds patios, balconies and grill parties. The balcony is therefore mentioned only in the retailer’s text. Whether gas grilling is allowed there at all is governed by your tenancy agreement and house rules, and you cannot look up clearances to the wall or parapet here. What you should clarify beforehand is covered in the guide grilling on a balcony.

For a motorhome, that means: next to the vehicle, on level ground and not under the awning.

The Onlyfire is the wrong choice for anyone who wants to keep the gas bottle hidden in the cart. For that, there are trolleys with a lower cabinet such as the Enders Urban II Pro Trolley. It is also the wrong choice for anyone looking for a grill with an English-language manufacturer page and documented spare parts supply in Germany.