Hurricane Hanna offered a case study in the value of microgrids when it hit the Texas Coast near Corpus Christi on July 25, causing widespread power outages. The hurricane dumped up to 18 inches of water in parts of Texas and about 200,000 utility customers lost power, some for more than two days. However, as the hurricane approached the state, Enchanted Rock, a microgrid company based in Houston, islanded 27 of its customers from the grid, insulating them from possible power outages, according to Allan Schurr, Enchanted Rock chief commercial officer. The islanded sites represented about 30 MW of load. 

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