Companies Unplug From the Electric Grid, Delivering a Jolt to Utilities

From big-box retailers to high-tech manufacturers, more companies across the country are producing their own power. Since 2006, the number of electricity-generation units at commercial and industrial sites has more than quadrupled to roughly 40,000 from about 10,000, according to federal statistics.

By
REBECCA SMITH
and
CASSANDRA SWEET

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