Yes, it is possible to get a solar powered cool box. A solar powered cool box, also known as a solar fridge or solar freezer, uses solar energy from the sun to power a refrigeration unit and keep items inside cool. Solar cool boxes provide an eco-friendly alternative to traditional electric powered coolers and are great for off-grid use, camping, boating, and more. There are a variety of solar powered cool box options on the market ranging in size, price, and cooling capabilities.
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How Does a Solar Powered Cool Box Work?
A solar powered cool box consists of an insulated storage container connected to a solar panel and a thermoelectric cooling unit. The solar panel converts sunlight into electricity which powers the thermoelectric cooling unit.
The thermoelectric cooling unit contains a thermoelectric module that uses a process called the Peltier effect to create a temperature differential and absorb heat from inside the storage container. This cools the interior of the box. The heat absorbed is then dissipated through a heat sink on the outside of the unit.
Thermoelectric systems have no moving parts, operate quietly, and can be powered entirely from solar energy during daylight hours. Many solar cool boxes also have a battery to store electricity and provide cooling even when the sun is not shining.
Main Components
The main components of a solar powered cool box include:
- Solar panel – Converts sunlight into electricity to power the thermoelectric cooler
- Thermoelectric cooling unit – Contains a thermoelectric module that transfers heat from inside the box to the outside to provide cooling
- Insulated storage container – The cooled inner storage compartment made of insulating material
- Battery – Stores solar energy to power the cooler when sunlight is not available
- Temperature controls – Allow adjustment of the interior temperature
Types of Solar Powered Cool Boxes
There are a few main types of solar powered cool boxes:
Portable
- Small and lightweight (10-30 quarts capacity)
- Ideal for camping, hiking, hunting, road trips
- Run entirely off solar power or use battery to store solar energy
- Can cool up to 20°F below ambient temperature
- Examples: Yeti Hopper, Coolest Cooler
Medium-Sized
- Approx. 30-60 quarts capacity
- For extended outdoor use, RVs, boats
- Both solar and AC power options
- Can cool up to 30°F below ambient temperature
- Examples: Dometic CoolFreeze, ARB Zero Fridge
Large
- Heavy duty 60+ quart capacity
- Ideal for remote cabins, events, emergencies
- Only operate on solar power
- Can cool up to 40°F below ambient temperature
- Examples: SunDanzer, IceCo Cooler
Key Features and Considerations
When choosing a solar powered cool box, here are some key features and factors to consider:
Solar Power
- Panel wattage – Determines how quickly the unit cools and how cold it can get. 50W or more is best.
- Battery capacity – Measured in amp-hours, more is better for off-grid use.
- Charge controller – Regulates solar energy into the battery. Look for MPPT type.
- Recommend getting a portable solar panel to provide supplementary charging.
Cooling Performance
- Temperature range – Maximum coldness below ambient temperature.
- Holdover time – How long the box can maintain cold temps without any power.
Size and Portability
- Storage capacity – Interior volume ranging from 10 quarts to 100+ quarts.
- Physical size and weight – Important if you need to transport the unit.
- Portability features – Carry handles, durable casing, tie downs.
Additional Features
- Design – Rugged, durable, and waterproof casing.
- Digital temperature display and controls.
- Interior shelving and dividers to organize contents.
- Drain plug for easy cleaning.
- Versatility to run off solar, AC, or DC power sources.
Price
- Budget portable models start around $200.
- Mid-range units run $500 to $800.
- Large heavy-duty units cost $1000+.
Top Solar Powered Cool Boxes
Some top options to consider:
| Brand & Model | Capacity | Power | Cooling Temp | Weight | Price |
|---|---|---|---|---|---|
| Yeti Hopper Backflip 24 | 20 quarts | 50W solar panel | -20°F | 15 lbs | $800 |
| Dometic CFX3 55IM | 54 quarts | 50W solar panel | -18°F | 63 lbs | $1,300 |
| SunDanzer BR-IM108 | 102 quarts | 100W solar panel | -32°F | 68 lbs | $1,700 |
DIY Solar Cooler Options
For a more affordable option, you can build your own solar powered cooler by combining:
- A high quality regular cooler.
- A portable solar panel and battery pack.
- A thermoelectric cooling unit.
Add insulation around the thermoelectric unit to improve performance. This allows you to customize the size and cooling capabilities.
Conclusion
Solar powered cool boxes provide a versatile off-grid cooling solution. Models are available in various sizes and capacities to suit different needs. Key factors to consider are solar power capabilities, cooling performance, size, features, and budget. With many quality options available, solar powered cool boxes are a great eco-friendly alternative to traditional coolers for outdoor adventures and remote use.