Thanks to severe weather and an aging power grid, generators can provide additional sales any time of the year.
In August, as Hurricane Irene aimed for the U.S.'s Eastern Seaboard, residents along the coast went shopping. Stores were cleaned out as people bought essentials to help them get through the storm and clean up in the aftermath. In a few hours, flashlights, batteries and essential food items were in short supply across the region.
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