The Mestic Cool Box Thermoelectric MTEC-25 AC/DC is a versatile companion for day trips and holidays, weighing just 4 kg for easy portability. With its ability to cool up to 20 °C below ambient temperature, it's perfect for destinations with mild climates. Whether you're heading to the beach or a picnic spot, this portable cooler keeps up to 23l of contents chilled, ensuring your drinks and snacks stay refreshing throughout the day.
Equipped with both 12 V and 230 V connections, this Mestic Cool Box Thermoelectric MTEC-25 AC/DC offers flexibility in powering options. Its high-quality insulation ensures that once the desired temperature is reached, it's maintained for extended periods. While suitable for mild summers, it's recommended to pre-cool items before placing them inside to maximise cooling efficiency and energy savings. Additionally, the eco mode feature further enhances its energy efficiency, making it an environmentally conscious choice for cooling needs.
Experience enhanced comfort on the go with the Mestic Cool Box Thermoelectric MTEC-25 AC/DC. Its dual-voltage capability allows for efficient cooling using a 12 V connection during transit and an easy switch to 230 V upon arrival for sustained performance. Designed for convenience, its compact form and car plug feature ensure it occupies minimal space in your vehicle while delivering optimal cooling. This thermoelectric cool box adapts to your preferences, keeping drinks cold or snacks warm, making every outing a pleasure.
Mestic Cool Box Thermoelectric MTEC-25 AC/DC Features
Cooling Power: Chill your beverages and snacks effortlessly with the ability to cool up to 20 °C below ambient temperature.
Portability: Weighing just 4 kg, this cool box is your lightweight companion for day trips and holidays.
Power Options: Enjoy the flexibility of both 12 V and 230 V connections, ensuring uninterrupted cooling wherever you go.
Energy Efficiency: Save energy and reduce your environmental footprint with the eco mode feature, making it an eco-conscious choice for cooling needs.
Specifications
Article number: 1502910
Connection voltage: 12 V & 230 V
Dimensions (hxwxd): 40.7 x 39 x 30 cm
EAN-code: 8712757461806
Eco mode: Yes
Suitable for: 1 L bottles
Weight: 4 kg
Content: 23 L
Adjustable temperature range: Up to 20 °C below the ambient temperature
Material: Plastic
Storage compartment for cables: Yes
Cool box type: Thermoelectric
Heating function: Yes
THIS COOLBOX USES THERMOELECTRIC TECHNOLOGY
What is the difference between the cooling technologies? ABSORPTION COOLING Details of distinguishing features:
Gas-powered cooling independent of electricity
Three way cooling – Gas, 12 volts DC or 230 volts AC
Silent operation
Cooling performance depending on the ambient temperature
The Technical Bit A concentrated ammonia solution is heated in a boiler and expelled as vapour. The pressurised ammonia gas is then liquefied in a condenser. Supplied with hydrogen, it evaporates and in the process extracts heat from the storage container. The ammonia gas then enters the absorber where it is reabsorbed in a weak solution of ammonia. Finally, the saturated solution flows back to the boiler where the whole cycle starts again.
THERMOELECTRIC TECHNOLOGY Details of distinguishing features:
12 / 24 / 230 Volt
Independent of inclination
Lightweight and low-cost
Cooling performance depending on the ambient temperature
The Technical Bit The thermoelectric principle was discovered by J. C. A. Peltier, which is why the temperature generating parts of thermoelectric systems are referred to as Peltier elements. Thermoelectrics are based on the fact that cold or heat energy (depending on the polarity) is generated when a DC current is conducted between different types of metal. The heating or cooling capacity is further enhanced by heat exchangers and air fans. Ideal for low and medium cooling volumes.
COMPRESSOR TECHNOLOGY Details of distinguishing features:
Excellent cooling performance even at extreme ambient temperatures
Refrigeration and deep-freezing
12 / 24 / 100 – 240 volts
Low power consumption – suitable for solar operation
Battery protection
Quiet operation with little vibration
Independent of inclination
The Technical Bit Compressor units operate using a refrigerant that changes from liquid to gaseous state in the evaporator. The evaporation extracts heat from the interior of the cooling unit – the temperature drops. The compressor draws in the refrigerant, compresses it and passes it on to the condenser. Here, the absorbed heat is released to the atmosphere. The refrigerant liquefies again and flows to the evaporator, where the cycle begins again.
Frequently Asked Questions
What does cooling 20°C below ambient actually mean in practice?
If the outside temperature is 15°C, the Mestic MTEC-25 can cool contents down to approximately -5°C. On a warm 25°C day, expect internal temperatures around 5°C. This means cooling performance varies with weather conditions. Pre-cooling items in your home fridge before packing them significantly improves results because thermoelectric coolers maintain temperature more effectively than they drop it from warm.
Can I run this cool box from my leisure battery without flattening it?
The MTEC-25 draws approximately 48 watts on 12V, which equals around 4 amps per hour. A 100Ah leisure battery could theoretically run it for 25 hours, but you should never discharge leisure batteries below 50 percent capacity. Using eco mode reduces power consumption. Most caravanners and motorhomers switch to mains power when pitched up and only use 12V during transit to preserve battery capacity for lighting and other essentials.
How does thermoelectric cooling differ from compressor cool boxes?
Thermoelectric boxes like the MTEC-25 use Peltier elements that create temperature differences when electricity passes through dissimilar metals. They have no moving parts except cooling fans, making them silent and lighter than compressor models. However, compressor cool boxes achieve much lower temperatures regardless of ambient conditions and can freeze items, whilst thermoelectric models only cool relative to outside temperature. Thermoelectric technology costs less initially but uses more power for equivalent cooling capacity.
What does eco mode actually do on thermoelectric cool boxes?
Eco mode on the MTEC-25 reduces the power supplied to the Peltier element, cutting electricity consumption by approximately 30-40 percent. The trade-off is slightly reduced cooling capacity, typically around 3-5°C less temperature differential. Use eco mode when contents are already cold and you're maintaining temperature rather than dropping it, when running on leisure battery power, or overnight when ambient temperatures naturally fall. Switch back to normal mode during hot daytime periods or when initially cooling warm items.
Can I use this cool box whilst driving without draining my vehicle battery?
When your vehicle engine is running, the alternator generates enough power to run the MTEC-25 on 12V without affecting your starter battery. The cool box draws approximately 4 amps, well within what a standard alternator produces. Never run it from 12V when the engine is off unless connected to a separate leisure battery system, as it will flatten a starter battery within a few hours. Most caravan and motorhome 12V sockets automatically isolate when the engine stops to prevent this exact problem.
How important is ventilation around the cool box for proper cooling?
Thermoelectric cool boxes rely on heat exchangers and fans to dissipate warmth extracted from the interior. The MTEC-25 needs at least 10cm clearance around all ventilation grilles for air circulation. Blocking vents reduces cooling efficiency dramatically and can overheat the Peltier element, potentially causing permanent damage. Never place the cool box directly against awning walls, under bedding, or in enclosed cupboards whilst operating. Boot space with airflow around it works fine, but avoid covering ventilation areas with bags or equipment.
What capacity does 23 litres actually give you in practical terms?
The 23-litre capacity holds approximately 30 standard 330ml cans standing upright, or around 12 one-litre bottles of soft drinks or milk. Alternatively, you can fit roughly 15-18 ready meals in foil containers alongside some drinks. The internal dimensions accommodate standing bottles up to one litre, avoiding the frustration of horizontal-only storage. For a couple on a weekend trip, this provides adequate capacity for chilled food and drinks. Families or longer trips typically need larger capacity or supplementary cool storage.
Does the MTEC-25 work in hot weather or only mild UK temperatures?
The 20°C below ambient specification means effectiveness decreases as outside temperatures rise. At 30°C ambient, contents reach around 10°C, which keeps drinks cool but not properly cold. Above 35°C ambient, performance becomes marginal for food safety. The MTEC-25 works well for typical UK camping conditions between 10-25°C ambient. For Mediterranean summers or heatwaves, compressor technology provides more reliable cooling. Placing the cool box in shade rather than direct sunlight and pre-cooling contents maximises performance in warmer conditions.
Can thermoelectric cool boxes be used at any angle or do they need to stay level?
Thermoelectric cool boxes like the MTEC-25 work at any angle because they contain no liquids or gases that require level operation. This differs from absorption cool boxes which must stay within 3 degrees of level to function properly. You can safely use the MTEC-25 on slopes, during travel over uneven terrain, or positioned at angles in vehicles. The solid-state Peltier technology and simple heat exchanger design mean orientation does not affect cooling performance, making thermoelectric boxes more versatile for mobile use than absorption models.
If you’ve changed your mind about keeping your purchase, please return it in its original condition with proof of purchase and we’ll exchange or refund it. Unless faulty, this should be within 100 days of receiving your order. By original condition, we’d expect this to mean that you’ve kept packaging and labels, and that the item is undamaged and unused.
For further information of how to return your item, please visit the "Returning an Unwanted/Faulty/Damaged Item" section on our Help Page.
Did you know we have been established and have been in the caravan and motorhome industry for over 50 years?
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