Cold beer at the end of a long day in the bush. Fresh meat for the BBQ, fresh milk in the morning brew, ice cream for the kids. The 12V camping fridge has done more for the quality of Aussie 4WD touring than just about any other piece of gear in the last two decades.

But fridges aren't a buy-and-go purchase — they need a properly sized battery system, correct wiring, and a sensible install. Here's the practical guide to picking the right fridge and setting it up so it actually works on a 7-day remote trip.

Photo by 4Wheelhouse on Unsplash

Three-way absorption (gas/240V/12V) — the older caravan-style fridge. Quiet (no compressor), runs efficiently on LPG for long base camps. Downsides: need to be level to work, slow to cool, heavy 12V power draw, harder to regulate. Good for stationary caravan use; poor for moving 4WD touring.

12V thermocouple (Peltier) — small portable "esky-style" 12V coolers. Cool 10-15°C below ambient temp only. So on a 35°C day = 20°C interior. Power-hungry for poor results. Avoid for serious bush use.

12V compressor — same principle as your home fridge but with a 12V DC motor. Works at any angle, freezes if you set it cold enough, efficient power use. The standard for any serious 4WD/camping setup.

Brands that matter: Engel (the Japanese-made benchmark — bombproof, 30+ year reputation), Dometic / Waeco (the volume leader, broad range), MyCoolman (Aussie brand, well-reviewed), ARB, EvaKool. Sizes 30-95L for most needs.

• 30-40L — couple, weekend trips, drinks + meat for 2-3 days
• 50-60L — sweet spot for most families, 4-7 day trips
• 70-95L — bigger families or extended remote trips, often dual-zone (one fridge + one freezer)

The freezer question: a fridge running as a freezer uses dramatically more power. If you want both, a dual-zone unit lets you set one zone freezer, the other fridge, with separate temp controls. Or carry a small ice block in a regular fridge for short cold snaps.

Photo: 4Wheelhouse / Unsplash

You can have the best fridge in the world, but if your battery setup can't keep up, the fridge is useless on day 2.

Single-battery vehicle — you can run a small fridge for a day or two while driving (engine charging the battery). Once parked, the fridge will flatten the battery overnight unless you have power coming in (solar, mains hookup). High risk of not starting the next morning.

Dual-battery system — the standard for serious 4WD touring. Auxiliary deep-cycle battery, isolator/DC-DC charger separating it from the starting battery. Fridge runs off auxiliary while engine off, doesn't drain the starter. Imperative for multi-day camps.

Battery types:

• AGM (Absorbed Glass Mat) — better than wet lead-acid; lighter, more robust, better deep-discharge tolerance, accepts charge faster
• LiFePO4 (lithium iron phosphate) — the modern premium choice. Half the weight of AGM, double the usable capacity, 5x the cycle life. Expensive ($800-1500 for a 100Ah). Worth it for serious touring

Sizing: a 50L fridge running as fridge in summer needs ~30-50Ah/day. A 100Ah AGM gives you ~50Ah usable (don't deep-discharge). So a 100Ah aux + 200W solar will keep things humming indefinitely.

For multi-day stationary camps, a portable solar panel converts a 2-day fridge setup into an indefinite one.

• 150-200W folding solar blanket / panel (Dometic, Hard Korr, KickAss) — feeds the auxiliary battery during the day
• Doesn't run the fridge directly — top-charges the battery, which runs the fridge
• Aim for 1.5-2x daily fridge consumption from solar so you've got buffer for cloudy days
• Position panels to catch morning + afternoon sun (orientation matters more than wattage)

Best $400-600 you'll spend on a touring setup. Removes the "where will we plug in?" stress.

Photo: 4Wheelhouse / Unsplash

• Don't use the cigarette-lighter socket. They vibrate loose, voltage drops on the small wires, the fridge thinks the battery is dying and shuts off
• Direct wire from auxiliary battery to fridge with at least 6mm² cable, 20A fuse at the battery
• Anderson plug at the fridge end (50A red) — robust, weatherproof, easy to disconnect for moving the fridge
• Strain relief the cable run — sheath through grommets, not over sharp edges
• Shorter is better — voltage drop is real over long runs of thin wire

Most install jobs are an afternoon's work for someone with basic 12V skills, or $200-400 at an auto-electrician.

• Air gap around the condenser fins — usually the back/bottom — for ventilation. Crammed-in fridge runs hot and inefficient
• Tied down securely — a 30L fridge full of food + ice + drinks weighs 25kg. In a roll-over, that's a missile. Use proper tie-downs (Sea to Summit Bombproof, ARB tracks)
• Slider mechanism — game-changer for accessing the fridge in a 4WD wagon. ARB or Drifta sliders extend out from the rear so you can reach the bottom without unloading the car. Some drop on a pantograph for even easier access
• Insulated cover — adds 20-30% to efficiency, especially in summer heat

Don't skimp on the fridge — it'll outlive your current vehicle. Engel for bombproof reliability, Dometic CFX or MyCoolman for value + features. Pair with a 100Ah lithium auxiliary, a 200W solar panel, direct 6mm wiring on an Anderson plug. That setup runs indefinitely off-grid.

Cold beer in the bush is one of life's small joys. Worth doing right.