Promethean Power Systems has developed a milk chiller that operates on a thermal energy battery and can function even in remote Indian villages receiving intermittent electricity supply. Founded by US-based Sorin Grama and Sam White in 2007, Promethean Power has installed over 200 milk chilling systems throughout rural India. About 20 farmers can use one chiller. These are farmers who were unable to supply milk to dairies earlier because they couldn’t refrigerate the milk without reliable electricity.
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