Electricity-Free Solar Refrigeration for Lifesaving Medicines

Coolar is piloting electricity-free cooling systems powered by solar heat

Coolar

REFRIGERATOR

The Coolar system uses warm water that is easy to generate through solar energy and easy to store in a water tank. It does not require any short-lived batteries or electronic components, nor rotating parts. It does not use any hazardous refrigerants or lubricants.

This way, the Coolar system can provide the most economical, durable and sustainable solution for vaccine, medicine and food storage in regions with unreliable or expensive electricity.

Unique Technology

Long-lasting

Long-lasting

System requires no short-lived batteries and contains no easy to break.

Economical

Economical

No running costs as it is powered by hot water from abundant solar heat.

Green

Green

CO2 emissions are 10 x lower compared to conventional fridges.

Non-hazardous

Non-hazardous

Uses no hazardous materials, which makes it unproblematic upon disposal.

Social

Social

Enables reliable cooling for people without access to stable electricity.

HOW IT WORKS

1. Evaporation

Part of the water evaporates in the evaporator due to low pressure in the system. The resulting evaporation cooling effect cools the storage compartment.

2. Adsorption

The adsorbent attracts vapour, binds it on its surface and frees up space in the evaporator. In that space more water evaporates, so multiplying the cooling effect.

3. Drying

Once the adsorbent’s surface is full of vapour, cooling temporarily pauses. In order for the process to be repeated, the adsorbent has to be dried.

4. Condensation

By heating the adsorbent is dried and all vapour is released from its surface. The vapour condenses and flows back into the evaporator, which completes the cycle.

Our Products

Off grid Medical Refrigerator VCA 90

Our innovative, water-based refrigeration system delivers reliable cooling without the need for electricity or harmful refrigerants.

Read More

Off grid Medical Refrigerator VCA 90

AC Efficiency Booster

The Hybrid Air Conditioning System delivers superior efficiency by harnessing waste heat to optimize cooling performance.

Read More

AC Efficiency Booster

Mobile Cold Box

The Coolar Cold Box is a sustainable, battery-free cooling solution designed for reliable off-grid performance.

Read More

Mobile Cold Box

Why Choose Coolar

Durability

No rotating parts, no short-lived batteries, minimal electronics.

Maintenance

System uses solar heat and warm water; simple inputs.

Eco-Friendly

Carbon emissions ~10× lower than conventional fridges.

Safety

Uses no hazardous refrigerants or lubricants.

Affordability

No running costs thanks to solar heat / warm water input.

What Our Clients say

5.0 rating based on 1,234 ratings

"Their technicians are always prompt, professional, and knowledgeable. From regular maintenance to emergency repairs, they've got us covered. Highly recommend!"

Jake M.
developer
4.0 rating based on 1,234 ratings

"From the initial consultation to the final installation, their team demonstrated professionalism, expertise, and a commitment to excellence. Our new HVAC system is performing flawlessly."

Morni M.
developer
3.5 rating based on 1,234 ratings

"Their technicians are always prompt, professional, and knowledgeable. From regular maintenance to emergency repairs, they've got us covered. Highly recommend!"

Brunu T.
developer
4.5 rating based on 1,234 ratings

"From the initial consultation to the final installation, their team demonstrated professionalism, expertise, and a commitment to excellence. Our new HVAC system is performing flawlessly."

Edward P.
developer
5.0 rating based on 1,234 ratings

"Their technicians are always prompt, professional, and knowledgeable. From regular maintenance to emergency repairs, they've got us covered. Highly recommend!"

Michel S.
developer
5.0 rating based on 1,234 ratings

"Their technicians are always prompt, professional, and knowledgeable. From regular maintenance to emergency repairs, they've got us covered. Highly recommend!"

Dainel V.
manager
5.0 rating based on 1,234 ratings

"Their technicians are always prompt, professional, and knowledgeable. From regular maintenance to emergency repairs, they've got us covered. Highly recommend!"

Tim W.
developer
Scrolling Logo Section

Awards and friends of Coolar

Stay updated with us

Off-Grid Experts Award nominates Coolar for best new product 2015

Coolar was nominated for the best new product during the Off-Grid Expert Awards 2015 held in Memmingen in line with the Off-Grid Experts...

Read More

Coolar competes for the StartGreen Award 2015

Coolar has been nominated as one of six Start-up’s competing in the semi-finals of the StartGreen Award 2015. After being selected by an expert jury...

Read More

Coolar wins the second prize at Darboven Idee

On the 5th of November Darboven Idee Prize – the most prestigious award for women with promising business concepts and pioneering business ideas – awarded the...

Read More