NEW YORK: General Electric Co. said it will buy 25,000 electric vehicles by 2015 to use in its fleets and those of its fleet-services business, converting at least half of one of the world's biggest vehicle fleets to mostly electric. “By electrifying our own fleet, we will accelerate the adoption curve, drive scale, and move electric vehicles from anticipation to action,” said Jeff Immelt, GE's chairman and chief executive, in a statement Thursday. He said electric vehicles could deliver up to $500 million in revenue for GE in the next three years through sales of its WattStation electric-car recharger and other products. It will initially buy 12,000 Chevrolet Volts, made by GM, starting in 2011. It will then add other electric vehicles to its fleet as other carmakers expand their offerings.