Compressor or absorption fridge for a campervan?
For most UK campervans, a 12V compressor fridge is the best choice. It sips power from your leisure battery, copes well with warm days and uneven pitches, and pairs naturally with solar. A 3-way absorption fridge (gas, 12V and 230V) still makes sense if you spend most nights on electric hook-up or want silent cooling on gas for long off-grid stays, but it needs careful installation, venting and a level pitch.
Key takeaways
- Compressor suits most UK campervans. Low battery use, good in warm weather and happy on sloping pitches.
- Absorption is silent and runs on gas. Ideal if you mostly stay on campsites with electric hook-up.
- Absorption is power hungry on 12V. The Dometic RM10.5T is rated at 130W on 12V DC, so 12V mode is normally only used while driving.
- Gas needs a professional. Absorption fridges need external vents, a flue and a professionally fitted and tested gas supply.
- Match capacity to how you travel. 30 to 50 litres for short trips, 70 to 90 for a week, 100 plus for families or full-timers.
Choosing a fridge is one of the bigger decisions in any van build or upgrade. Get it right and you have cold milk in the Cairngorms and chilled drinks on a Cornish clifftop. Get it wrong and you are nursing a flat leisure battery by day two. This guide explains how each type works, what the real-world power numbers look like, and which suits the way you actually travel. You can browse every model we stock in our campervan appliances collection.
At a glance: compressor vs absorption
| 12V compressor fridge | 3-way absorption fridge | |
|---|---|---|
| Power sources | 12/24V DC (some models add 230V) | LPG gas, 12V DC and 230V mains |
| Battery use | Very low: cycles on and off | High on 12V: usually only used while driving |
| Best for | Off-grid, solar, wild-ish stops, warm weather | Hook-up sites and long stays on gas |
| Noise | Gentle hum when the compressor runs | Silent |
| Levelling | Tolerant of sloping pitches | Needs to be close to level |
| Hot weather | Strong, consistent cooling | Can struggle above around 30°C without good ventilation |
| Installation | Simple: 12V feed and airflow | External vents, flue and a professionally fitted gas supply |
Bottom line
For most UK campervans a 12V compressor fridge is the best choice. A 3-way absorption fridge still makes sense if you spend most nights on electric hook-up or want silent cooling on gas.
How a compressor fridge works
A compressor fridge works just like the one in your kitchen. A small motor pumps refrigerant around a sealed circuit, pulling heat out of the cabinet. The difference is that campervan models run directly on 12V or 24V DC, and the compressor only switches on when the temperature rises. That on-off cycling is why they are so economical.
Take the Dometic NRX80 compressor fridge as a real example. Dometic quotes a 75-litre gross capacity, a rated DC input of 55W and energy consumption of 0.33 kWh per 24 hours. At 12V that works out at roughly 27-28Ah a day, which a decent leisure battery and a modest solar panel can comfortably replace on most UK days from spring to autumn. Step up to the larger NRX 115 (113 litres) and the quoted figure is still only 0.48 kWh per 24 hours.
Pros:
- Low daily energy use, ideal for leisure batteries, lithium setups and solar
- Cools quickly and holds temperature well on hot days
- Happy on sloping lay-bys and grass pitches
- No gas, flue or external vents needed, so installation is far simpler
Cons:
- A faint hum when the compressor kicks in (many models have an eco or night mode)
- Totally reliant on your battery bank when you are off hook-up
How a 3-way absorption fridge works
Absorption fridges have no compressor at all. Instead, heat from a gas flame or an electric element drives a refrigerant solution around the cooling circuit. Because nothing moves, they are completely silent, and the ability to run on gas means you can keep food cold for days without touching your battery.
The catch is efficiency on electric. The Dometic RM10.5T absorption fridge is rated at 130W on 12V DC and 135W on 230V, with a quoted 2.8 kWh per 24 hours on mains. On 12V, 130W means close to 11 amps continuously, enough to flatten a typical leisure battery in an evening. That is why 12V mode is normally wired to work only while the engine is running, with gas or hook-up taking over when you park.
Larger models suit vans with space for a tall unit. The Thetford N4150A absorption fridge offers 149 litres with a 25-litre freezer and automatic energy selection, which switches between gas, 12V and 230V for you. Thetford quotes gas consumption of 420g per 24 hours, so a 6kg cylinder could, in theory, run the fridge alone for around two weeks. Real use will vary with the weather and how often you open the door.
Pros:
- Silent, which light sleepers love
- Runs for long periods on gas without using battery power
- Ideal if you mostly stay on campsites with electric hook-up
Cons:
- Needs to be close to level to cool properly
- Performance drops in heatwaves unless ventilation is excellent
- Requires external vents, a flue and a professionally installed and tested gas supply
- Heavy power draw on 12V
What about thermoelectric cool boxes?
Cheap plug-in cool boxes use thermoelectric (Peltier) cooling. They are fine for keeping a picnic cool on a day trip, but they can only cool to a set number of degrees below the outside air and they draw power constantly. For a campervan you are going to sleep in, we would always recommend a proper compressor or absorption fridge.
Which fridge suits the way you travel?
Weekenders and off-grid explorers
If you like quiet car parks, Scottish single-track roads or a few nights between campsites, go compressor. Pair it with a good leisure battery and solar and you can stay out for days. A portable power station is a handy way to add capacity without rewiring your van.
Hook-up regulars and long-stay tourers
If you book pitches with electric hook-up most nights, an absorption fridge on 230V works well and you never hear it. Gas gives you a fall-back for the odd night off-grid.
Small vans and day vans
Short on space in a VW Transporter or a compact conversion? A drawer fridge slides under a worktop or seat. The Dometic CoolMatic CD 30 drawer fridge is a 30-litre compressor unit rated at 36W on 12/24V, and its cooling unit can be mounted to either side, which makes it easier to fit into an awkward cabinet.
Families and full-timers
Capacity matters more than you think. As a rough guide, 30-50 litres suits one or two people on short trips, 70-90 litres suits couples touring for a week, and 100 litres plus with a proper freezer suits families or full-time vanlifers.
UK-specific things to think about
- Ferries and the Channel Tunnel: operators typically require gas cylinders to be switched off during the crossing. A compressor fridge keeps running on battery; an absorption fridge will slowly warm up. Always check your operator's current rules.
- Gas safety: any LPG appliance in a leisure vehicle should be fitted and tested by a suitably qualified LPG engineer. Never DIY a gas connection.
- Our climate: British summers are mild, but a van parked in the sun on a 25°C day gets very warm inside. Compressor fridges handle this better, and good ventilation helps either type.
- Winter use: both types work in cold weather, but follow the manufacturer's guidance on winter vent covers for absorption fridges.
Installation tips for a happy fridge
- Leave the airflow gaps the manufacturer specifies. A compressor fridge that cannot dump heat will run constantly and use far more power.
- Use the correct cable size for 12V runs to avoid voltage drop, which can trigger low-voltage cut-outs.
- Pre-chill the fridge on mains at home the night before you leave.
- Pack it full: a full fridge holds its temperature better than an empty one.
- For absorption models, level the van with ramps on arrival before switching to gas.
Frequently asked questions
Can I run a compressor fridge all night on a leisure battery?
Yes. That is exactly what they are designed for. Using the NRX80 figure of 0.33 kWh per 24 hours, a healthy battery bank can run it for well over a day, and solar or driving will top it up.
Can I run an absorption fridge on gas while driving?
Most owners and manufacturers recommend 12V mode while driving, with gas switched off when refuelling. Always follow your fridge's manual and the rules of your gas installation.
Are compressor fridges noisy?
Not very. You will hear a low hum when the compressor runs, and many models have a quieter night or silent mode. The Dometic RCS 10.5T, for example, is rated at 44 dB(A).
Can I swap an absorption fridge for a compressor one?
Often, yes. Some compressor fridges share a near-identical footprint with popular absorption models: the Dometic RCS 10.5T compressor fridge and the RM10.5T absorption fridge are both 82.1cm high and 52.3cm wide. You will need a suitable 12V feed, and any redundant gas pipework should be capped by a qualified engineer.
What size fridge do I need for a campervan?
For two people on weekend trips, 40-80 litres is usually plenty. If you tour for a week or more, or want to freeze food, look at 90 litres and above with a separate freezer compartment.
Still not sure which fridge to choose?
Every van and every traveller is different. If you would like help matching a fridge to your van, your battery setup and your travel style, our team is happy to talk it through. Call us on 0330 122 7773 or use live chat for friendly, expert advice. All prices include VAT, and we offer free UK mainland delivery on all orders.
