“This will be revolutionary for food security in areas that don’t have reliable electricity… The impact will be that dairy farmers will make a lot more money in a much more sustainable way, and the consumers will be drinking much healthier milk. So the whole ecosystem rises.”

Promethean Power Systems co-founder Sam White explains his approach to ensuring that milk produced by off-grid communities in India, the largest producer and consumer of milk in the world, is properly refrigerated and not spoiled by bacteria.