Solar pasteurisation is the process of pasteurisation using solely solar thermal energy. It is mostly applied for water. It is applied by using a solar cooker that can absorb solar thermal energy and transmit it to a black container e.g. a black jar. Typically, the significant time of heating by solar heat and cooling down contributes to the pasteurisation process.
Applied to water, the solar pasteurisation (heating to 60°C (140°F)) can inactivate both bacteria and rotaviruses, the main causes for severe diarrhea in children.