Fridges

Fridge or cooler

A powered portable fridge-freezer holds a steady temperature from a vehicle's 12-volt supply, so food does not sit in meltwater and you do not need to buy ice each day. A traditional cooler has no power draw and no moving parts, and works with ice or ice packs. The better choice depends on trip length, vehicle setup and budget.

Sizing by quarts and pack counts

Portable fridges are rated in quarts, such as 37, 50 or 63 quarts. As a rough guide, a smaller unit suits a couple on a weekend, and a larger unit suits a family or a longer trip. Coolers are often listed by how many cans they hold, such as 12, 24 or 36 pack. Measure your cargo area, since a fridge needs space for airflow, and consider the weight when full.

Power and operation

• 12-volt compressor fridges: run from the vehicle's accessory socket or a hardwired circuit, and many have a low-voltage cutoff to protect the battery.
• Dual battery systems: help run a fridge for extended periods without draining the starting battery.
• Remote monitors: let you check the interior temperature without opening the lid.

Always check the power requirements and the cutoff setting for your electrical system.

Accessories

Transit bags protect a fridge from dust, sun and scrapes. Slides let you pull the fridge out of the cargo area, which makes loading easier and keeps your back happier. Seat cushions, dividers and covers for some coolers help with organizing and comfort. Check that the accessory matches the exact size and model of the fridge or cooler.

Use and care

Pre-chill the fridge before packing and fill empty space to reduce temperature swings. Keep ventilation openings clear, secure the unit so it cannot slide in a hard stop or rollover, and keep it out of direct sun. Clean the interior and leave the lid slightly open during storage to prevent odors. Always check the specifications and dimensions before choosing a model.

Food safety and packing tips

Whatever you choose, safe food handling matters on trips. Keep refrigerated food at or below roughly 40 degrees Fahrenheit, and keep raw meat separated from ready-to-eat food in sealed containers. A pre-chilled fridge or cooler holds temperature far longer, so cool the unit and the food before departure. Pack items in the order you will need them, with drinks that get opened often on top or in a separate bag. Frozen water bottles act as ice and then become drinking water as they melt. In hot weather, keep the unit in the shade, ideally in the cabin rather than an open truck bed. Use a thermometer to verify temperature, and clean spills quickly, since moisture and food residue cause odors and attract wildlife at camp.

A common mistake is leaving a powered fridge running from the starting battery with the engine off for long periods. Another is blocking the ventilation, which makes the compressor run constantly. Leave space around the unit and secure it with tie-downs rated for its weight, since a loose fridge becomes a hazard in a hard stop.