Caterpillar Turns on Hybrid Solar-diesel 'Microgrid'

Caterpillar Inc. has run its Tucson proving ground near Green Valley since 1990, putting mining trucks and other massive machines through their paces in the shadow of Freeport-McMoRan’s Sierrita mine. All the while the relatively remote, off-grid facility has been powered solely by Cat’s own diesel generators — but now the sun will do part of the work. The construction machinery giant last week launched a new product line with the christening of a hybrid solar-generator “microgrid” system at the proving ground.

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