The Koolboks Solar Freezer is an off-grid refrigeration solution that uses photovoltaic electricity to run the refrigeration circuit with natural R-600a refrigerant.

It provides a reliable and alternative long-term storage technique thanks to the high-quality insulation and ice battery integrated into the design. The ice batteries are "charged" by photovoltaic energy during the day and release cold during the night. The cycle is repeated daily and if there is no sun, the lithium-ion battery incorporated in the system, together with the high thermal insulation of the system, ensures an autonomy of 4-7 days. Lithium batteries are therefore only used as a buffer.

The ice batteries, when activated, reduce the amount of energy required by the compressor to cool the freezer, drastically improving the energy efficiency of the system. By storing energy in the form of ice, the freezer offers 40% cost savings over standard off-grid cooling systems. In addition, the thick insulation allows for an autonomy of 4 to 7 days without solar energy.

Koolboks freezers have been implemented for developing countries to provide small business owners with an affordable and reliable refrigeration solution that allows them to better store food and reduce losses where the cold chain is deficient. The Koolboks solution is often offered with a "lease-to-own" business model that helps reduce the high initial cost of purchasing solar refrigerators and allows you to pay in small installments using mobile banking.

Koolboks is a French startup that has designed these technologies especially for the Nigerian market, with the idea of ​​making cooling accessible to all, using solar energy to power refrigerators. The company promises 24-hour refrigeration without access to mains electricity at very affordable rates. Of course, these machines are suitable for any situation that can benefit from off-grid refrigeration, with the advantage of being truly zero emissions, whether direct or indirect emissions are considered.