Sunday, January 29, 2012
A 'thermal battery' for villages in India
[ Sun, 29 Jan 2012 04:00:00 PST ]
Startup Promethean Power had to ditch its dream of solar-powered milk chillers in rural India, but hit upon a novel energy storage system that's cheaper and overcomes the unreliable grid.
[ Sun, 29 Jan 2012 04:00:00 PST ]
Startup Promethean Power had to ditch its dream of solar-powered milk chillers in rural India, but hit upon a novel energy storage system that's cheaper and overcomes the unreliable grid.
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