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How Water Heaters Have Evolved into Grid-Scale Energy-Storage Devices (2014) (esource.com) 123 points by camtarn on Jan 27, 2019 | past | 144 comments How Water Heaters Evolved into Grid-Scale Energy-Storage Devices (2014) (esource.com) 24 points by davesailer on June 6, 2015 | past | 5 comments

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