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Institutional Solar Thermal Cooking Stove

A thermal solar cooking system for institutional cooking within schools and hospitals

June 2020
Gallery Institutional Solar Thermal Cooking Stove 1
Gallery Institutional Solar Thermal Cooking Stove 1


Designed for institutional users such as rural and peri-urban schools in Kenya, the Solar Thermal Cooking Stove system delivers a solution to both cook and heat water without using any firewood.

Addressing the lack of electricity, reliable supply and sustainable energy sources, this solution developed a tailor-made cooking system with the same capacity as the wood fuel stoves, using only the sun's rays as fuel. Apart from a minor demand of power for solar tracking, sustained by a small PV panel, the system requires no electricity or other fuel, storing heat for morning cooking. The institutional solar stove consists of a number of solar collectors (2 to 6, depending on application type, location and need for input heat), a heat storage component and an adequate number of cooking units, for school and larger-scale cooking - referred to as sufuria heaters. The heat is transferred between each component by means of thermosiphons, which are tubes, filled with water and at a slight sub-pressure. The solution helps to reduce cooking cost, deforestation, indoor pollution and improve the workplace environment for the cooks.

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Label Date June 19, 2020
From Sweden
Maturity stage Initial market commercialization
Looking For New clients, Funding, Credibility, Visibility

The environmental benefits

  • From 510 to 680 tons of CO2e emissions per school can be reduced annually
  • Indoor pollution from the burning of firewood could be reduced to almost zero
  • Between one and two hectares of forest could be saved from deforestation each year per school equipped

The Financial benefits

  • Payback time of around three years

Activity Region

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  • Headquarters
  • Activity

Company Profile

Renetech AB

Renetech was established in 2005 as a project developer in the field of renewable energy. Renetech’s business focus is bioresource recovery of energy and by-products (eg. nutrients) from a variety of biomass materials including organic residues and waste streams. Renetech is active in the area of Research and Development as a project developer, project partner and as a consultant for bioenergy, hydro, solar and resource recovery projects. Renetech has being working in East, West and Southern Africa since 2008.

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Headquarters 111 40 Stockholm, Sweden

Networking Partner


InnoEnergy supports and invests in innovation at every stage of the journey – from classroom to end-customer.

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Solutions Associated 45
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The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator Renetech AB has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.