Best Thermoelectric Portable Coolers for Car Trips, Camping and Home

The best thermoelectric cooling portable cooler for most people is the Igloo IE24 Thermoelectric Cooler & Warmer, a 12V unit sized for a week of drinks and snacks in a truck or RV, with the larger Igloo IE27 as the runner-up if you need more room. Thermoelectric coolers are simple, quiet and ice-free, but they work very differently from a compressor fridge: they cool a set number of degrees below the surrounding air rather than holding a fixed temperature. That single fact decides whether one of these coolers will delight you or disappoint you, so this guide explains it first and then walks through seven real, currently sold models, from a 6-quart personal cooler to a 27-quart family unit.

A note on method. We did not personally use these coolers. This guide is research-based: manufacturer descriptions, listing details and published specifications, plus independent reviews of thermoelectric coolers in general. Where a figure could not be confirmed, we say “not listed.” Capacities and cooling claims are the makers’ own, and real-world results depend on the weather, the car, how full the cooler is and how often it is opened.

Our top picks

Top pickIgloo IE24 Thermoelectric Cooler & Warmer

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Also greatIgloo IE27 Thermoelectric Cooler & Warmer

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Also greatIgloo Legacy 42 Thermoelectric Cooler & Warmer

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Also greatIgloo IE42 Roller Thermoelectric Cooler & Warmer

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Top Picks at a Glance

• Best Overall: Igloo IE24 Thermoelectric Cooler & Warmer, for road trips and RV use.
• Best for Families: Igloo IE27 Thermoelectric Cooler & Warmer, with a bigger interior.
• Best Value: SubSun 27 Quart Electric Cooler and Warmer, a large AC and DC unit in a mid price tier.
• Best Budget Personal Cooler: Wagan EL6206 6 Quart Personal Thermoelectric Cooler, for a lunch and a few drinks.
• Best Soft-Sided Option: Wagan EL6234 14L Electric Cooler Warmer Bag, for light carrying.
• Best Classic Brand: Koolatron 18 Quart Plug-in Cooler/Warmer, a long-running design.
• Best for Large Trips: AooDen 26 Quart Electric Car Cooler and Warmer, an iceless 26-quart unit.

Thermoelectric Portable Coolers: Comparison Table

How a Thermoelectric Cooler Actually Works

Before you pick a model, it helps to know what you are buying. A thermoelectric cooler uses a Peltier module: when electricity flows through it, one side gets cold and the other side gets hot. A fan pushes the heat out through a heat sink, and the cold side chills the inside of the box. There is no compressor, no refrigerant and very little that can break, which is why these units are light and quiet and can also run in reverse to keep food warm.

The catch is efficiency. A thermoelectric cooler is rated by how many degrees it can cool the inside below the outside air, commonly around 36 F (about 20 C) below ambient in the listings we saw. On a 70 F day that can mean a cool interior in the mid-30s to low-40s Fahrenheit. On a 100 F day in a parked car, the same cooler may only reach the 60s. Compressor coolers, by contrast, can hold a set temperature including below freezing regardless of the outside heat, at a higher price and weight. If you routinely face high heat, a compressor unit is the better tool, and we mention one in Also Consider.

1. Igloo IE24 Thermoelectric Cooler & Warmer: Best Overall

• Power: 12V DC car plug, for truck, RV, car and home use.
• Capacity: listed as holding 32 cans.
• Cooling: listed as cooling about 36 F below the surrounding temperature.
• Function: cooler and warmer in one unit.
• European retail pages describe an AC/DC IE24 with a 24 L interior and an eco mode; check that your listing matches the version you want.

Best for: road trips, truck drivers and RV owners who want a hard-sided cooler without ice. Skip if: you often park in direct summer sun or need to keep food at a specific safe temperature for a long time.

Igloo is one of the best-known cooler brands, and the IE24 is the model that pairs that name with a simple 12V design. The roughly 32-can capacity is enough for a family’s drinks and some sandwiches on a day trip, or a few days of snacks for one or two people on a longer drive. Because the cooler runs from the vehicle outlet, you do not need to buy ice, and there is no melt water to drain.

The warming mode is more useful than it sounds. Many people use it to keep a meal warm on a long drive or to take food to a family event. Note that a warming mode on a plug-in cooler is meant to hold a meal warm, not to cook or reheat, and no cooler of this type is a substitute for food safety practices such as keeping perishables cold and discarding food left too long at unsafe temperatures.

The main practical advice is to precool. Plug it in at home first (if your listing includes an AC adapter) or run it for a while before loading. Fill it with already-cold drinks and food, give the fan some clearance, and keep the lid closed. A thermoelectric cooler maintains temperature far better than it creates it.

Pros:

• Recognizable brand with a simple, proven design.
• No ice required.
• Cooling and warming in one box.
• Capacity well suited to a driver or couple.

Cons:

• Cooling depends on ambient temperature.
• Continuous draw on the car battery if left plugged in while parked.

2. Igloo IE27 Thermoelectric Cooler & Warmer: Best for Families

• Power: 12V DC, same use cases as the IE24.
• Capacity: listed as holding 37 cans.
• Cooling: listed as cooling about 36 F below ambient.
• Function: cooler and warmer.

Best for: families and small groups who want extra room. Skip if: you have limited trunk or seat space, or you only carry a few drinks.

The IE27 is the step up from the IE24, giving up some compactness for a handful more cans of capacity. That is a modest gain, so be honest about whether you need it. If you often take four people on day trips, bring bottles and a few containers of food, the extra room is welcome. If your trips are mostly solo commutes, the IE24 will fit better.

Thermoelectric coolers get less effective when packed too tightly, because cold air needs to circulate. Leaving some space inside, rather than cramming every corner, lets the system work more evenly. Tall bottles and lots of small containers waste capacity, so rely on can counts as a rough guide and not a promise.

Pros:

• More interior space than the IE24.
• Same simple controls and function.
• Good for group outings.

Cons:

• Takes more room in the vehicle.
• Costs more than the smaller model.

3. SubSun 27 Quart Electric Cooler and Warmer: Best Value

• Capacity: 27 quarts, with the listing also noting 25L.
• Power: 12V DC and 110V AC.
• Function: cooler and warmer, marketed as a car fridge cooler.
• Manufacturer details beyond the listing: not listed.

Best for: people who want a big interior and dual power at a mid price. Skip if: you prefer an established brand with long service history.

The appeal here is flexibility. The 12V plug handles the car, while the 110V adapter lets you use the cooler at home or in a hotel to pre-chill before a trip. That feature alone is worth a lot, because a pre-chilled load is the single biggest factor in how well a thermoelectric cooler performs on the road.

SubSun is a less familiar name than Igloo, Koolatron or Wagan, so we recommend checking the return policy and warranty terms on the listing you buy. We could not confirm independent test data for this model. Treat it as a good-value choice on paper and look closely at buyer feedback for noise and fan reliability.

Pros:

• Large interior at a mid price.
• Works from car or wall power.
• Cooling and warming.

Cons:

• Newer, less established brand.
• Independent performance data not found.

4. Wagan EL6206 6 Quart Personal Thermoelectric Cooler: Best Budget Personal Cooler

• Capacity: 6 quarts (6 liters).
• Power: 12V DC, with a 24V option listed.
• Function: cooler and warmer.
• Size: small enough to sit on a seat or floor.

Best for: commuters, delivery drivers and anyone who just needs a cold lunch and a drink or two. Skip if: you are feeding more than one person.

Not everyone needs a 27-quart box. For a lunch, a yogurt and a couple of bottles, a 6-quart unit is plenty, costs less and takes up almost no space. A small interior is also easier for a thermoelectric module to cool, so the temperature drop is easier to reach. For drivers who spend hours on the road, it makes a sandwich and a drink taste better than a warm lunch bag.

The trade-off is simply size. Two bottles of a 2-liter soda will not fit, and a family picnic is out of the question. Think of this as a personal appliance, not a camping cooler.

Pros:

• Compact and light.
• Budget price tier.
• 12V and 24V use makes it suitable for trucks.

Cons:

• Small interior.
• Not for groups.

5. Wagan EL6234 14L Electric Cooler Warmer Bag: Best Soft-Sided Option

• Capacity: 14 liters.
• Design: soft bag with dual cooling and warming.
• Power: plug-in, with the listing noting a shoulder strap.
• Insulation thickness: not listed.

Best for: people who need to carry the cooler from car to picnic table or office. Skip if: you want maximum insulation for hot weather.

A soft-sided bag is lighter and easier to carry than a hard cooler, and it folds smaller when not in use. The trade-off is insulation, which is usually thinner in soft bags and gives up cold faster once unplugged. For short trips and pre-chilled contents it is a practical choice, especially for commuters who go from car to desk.

Because a bag cannot be braced against the elements in the same way a hard cooler can, keep it out of direct sun and avoid placing it on a hot surface. If you plan to go more than an hour without power, a hard-sided model is safer.

Pros:

• Light, portable and storable.
• Cooling and warming modes.
• Budget to mid price.

Cons:

• Thinner insulation than hard coolers.
• Not ideal for long periods without power.

6. Koolatron 18 Quart Plug-in Cooler/Warmer: Best Classic Brand

• Capacity: 18 quarts (17 liters).
• Power: 12V car plug.
• Function: cooler and warmer, described as a no-ice thermoelectric portable fridge.
• Maker: Koolatron, a long-established maker of thermoelectric coolers.

Best for: drivers who want a mid-sized, simple 12V cooler from a specialist. Skip if: you need an AC adapter included, which is not listed here.

Koolatron has specialised in plug-in car coolers for years, and this model fits between the personal-size units and the 25-plus quart family coolers. At 18 quarts it takes a day’s worth of food for two people with room to spare, yet is still light enough to lift into a back seat.

Like all thermoelectric designs, it is best loaded with already-cold contents. Aim the fan end toward open space and avoid stacking blankets or bags against the vents. Cleaning is simple: wipe the interior with mild soap and water, dry thoroughly and leave the lid open during storage to prevent odors.

Pros:

• Specialist maker with a long history.
• Mid-size capacity suits most day trips.
• Easy to use and clean.

Cons:

• AC power details not listed.
• Less capacity than larger models.

7. AooDen 26 Quart Electric Car Cooler and Warmer: Best for Large Trips

• Capacity: 26 quarts.
• Type: thermoelectric, iceless, for travel, camping and vehicles.
• Function: cooler and warmer.
• Included accessories: not fully listed.

Best for: long weekends, camping and group trips. Skip if: your vehicle’s 12V outlet is weak or you rarely have enough clearance around the cooler.

This is a large iceless cooler that competes with the SubSun and Igloo IE27. Its 26-quart size gives space for several days of drinks for a small group. As with the others, airflow matters: the fan needs open space on the heat-dissipating side.

For group trips, think about power before you buy. Check that your vehicle’s 12V socket is rated for the cooler’s draw and that it stays powered when the engine is off, since some vehicles cut power at ignition off. If your socket switches off, you may need a portable power station for camp use.

Pros:

• Large interior.
• Iceless operation.
• Cooling and warming modes.

Cons:

• Needs ventilation space.
• Draws steady power from the vehicle.

Also Consider

Rigstne 18L Portable Electric Cooler Bag

A soft-sided 18-liter plug-in cooler and warmer for cars, with a listing that claims fast cooling in about 20 minutes. Treat the quick-cooling claim as a marketing figure that depends on conditions.

FinerFurnis 30L Portable Electric Car Cooler and Warmer

A 30-liter 12V/110V thermoelectric model with a handle and dual power. A good fit if you want the largest thermoelectric interior in this list.

Garvee 26L Electric Cooler and Warmer

A 26-liter 12V unit with an auto-lock handle, aimed at cars and trucks. Similar in size to the AooDen and SubSun units.

EUHOMY 19QT 12V Refrigerator (compressor)

If thermoelectric limits worry you, this compressor-based portable fridge is listed with a range from -4 F to 68 F. It is a different class of product, with a higher price tier, and is worth knowing about if you camp in hot weather.

How We Chose

This guide is research-based. We did not personally use these coolers. We began with real, currently sold thermoelectric coolers from an online product catalogue, then compared listing details, manufacturer descriptions and independent writing about how Peltier coolers work. We favoured models from established brands where possible, flagged lesser-known brands honestly and avoided repeating marketing speed claims as facts.

Our criteria were capacity (cans or quarts as listed), power options (12V only versus 12V plus AC), function (cooling only versus cooling and warming), portability (hard case versus soft bag) and clarity of the listing. We kept to two products per brand at most, and we included a range of sizes from a 6-quart personal unit to 27 quarts so that different use cases are covered.

Specifications such as can counts and “36 F below ambient” are the makers’ figures, and the performance you see will vary. Where details were not clearly listed, such as insulation thickness or included adapters, we say so.

Buying Guide

Decide between thermoelectric and compressor

If your use is mostly day trips, commuting or short camping in mild weather, thermoelectric is simpler and cheaper. If you need to keep food truly cold in heat above about 85 F, or you want freezing temperatures, step up to a compressor cooler. Thermoelectric coolers cool a fixed number of degrees below ambient (commonly around 36 F in listings), so a hot day shrinks the result.

Pick the right capacity

Match size to people and days. As a rule of thumb, 6 to 10 quarts suits one person, 14 to 20 quarts suits two people on a day trip, and 25 quarts or more suits a family or weekend. Remember that can counts assume standard 12-ounce cans packed neatly, and bottles reduce that number.

Check power and cables

Most models plug into a 12V vehicle outlet. Check the cord length, the fuse rating on your outlet and whether the outlet shuts off with the ignition. If you want to pre-chill at home, choose a model with an AC adapter. For camping without a vehicle, a portable power station with a 12V output is an option, but check the cooler’s wattage first, which is often not stated on the listing.

Look at insulation and design

Hard-sided coolers keep cold better than soft bags. Look for a tight-fitting lid, thick walls and a fan that has space to breathe. A model that can both cool and warm is handy but check that the switch is easy to use. Handles matter more than you expect on a 25-quart unit.

Think about food safety

Thermoelectric coolers are best for drinks, snacks and short trips. For raw meat, dairy and other perishables, keep a food thermometer in the box and follow local food safety guidance. If the interior cannot stay at a safe cold temperature, do not rely on it for those foods.

Common Mistakes to Avoid

• Loading warm drinks and expecting fast chilling.
• Blocking the fan vents with bags or blankets.
• Leaving the cooler plugged into a parked car for hours, which may drain the battery.
• Packing every corner so air cannot circulate.
• Treating the can count as a guarantee for tall bottles.

Frequently Asked Questions

What is the best thermoelectric cooler for a car?

The Igloo IE24 is our top pick for most cars and trucks thanks to its balance of capacity and simplicity. If you need more room, look at the Igloo IE27, SubSun 27 Quart or AooDen 26 Quart.

How cold does a thermoelectric cooler get?

Listings for these coolers commonly say about 36 F (20 C) below the surrounding air. On a hot day the inside will be warmer than on a cool day, so results vary.

Can a thermoelectric cooler replace a refrigerator?

No. It keeps already-cold items cool during travel, but it does not hold a set temperature like a compressor fridge. It is not a replacement for home refrigeration.

Will it drain my car battery?

It can if left plugged in while the engine is off, especially on an outlet that stays powered. Unplug when parked for long periods or use a power source that is designed for it.

Can I use one as a food warmer?

Many models include a warming mode that can hold food warm. It is not designed to cook or reheat, and food safety guidance still applies.

Do I need ice?

No, thermoelectric coolers are iceless. For very hot days, you may still choose to add a frozen pack to help the cooler, but check the manual first.

How do I keep it from smelling?

Wipe it out with mild soap and water after each trip, dry it fully and store it with the lid open. Remove any spilled liquids quickly.

Which One Should You Buy?

Choose the Igloo IE24 if you want a trusted brand and a practical size for road trips. Step up to the Igloo IE27, SubSun 27 Quart or AooDen 26 Quart for a family or a long weekend. Pick the Koolatron 18 Quart if you want a mid-sized plug-in cooler from a specialist, and the Wagan EL6206 if all you need is a cold lunch on the road. Choose the Wagan EL6234 bag for easy carrying. And if you routinely face high heat, consider a compressor model instead, because no thermoelectric cooler can overcome a very hot day.

Sources

• Igloo product pages and European retailer specification tables for the IE24
• Koolatron product information
• Wagan product information
• Retail product listing details for each named cooler
• Independent portable cooler guides on thermoelectric versus compressor cooling

Last updated: October 2026