The University of Hohenheim/Germany has been pilot testing a solar milk cooling system that can be operated independently, offering an off-grid solution for remote areas in western Kenya. Since August 2016, three systems have been installed in western Kenya, including one at the household of a local farmer in Nyalgunga. The system uses solar energy for cooling milk in Kenya and Tunisia.
The concept maintains the cold chain for storage and transport of milk, which is particularly critical in off-grid regions. The system is based on conventional direct current refrigerators equipped with a smart component. The cooling power demand is adapted to the solar energy generated each hour and batteries are replaced by thermal energy storage in the form of ice.