Image: lowtechmagazine.com
Low Tech Magazine descibes the fascinating possibilities of small scale compressed air energy storage (CAES), which are more sustainable than chemical batteries and robust enough to be suited to off-grid living. Parallel use of storage tanks can even allow for variable energy discharge to meet different energy requirements. 57 interconnected 10L storage tanks can match the output of four 24V car batteries for 20 hours with a storage capactiy of 410Wh, using 0.6m3 of space.
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