[ad#post_ad]Some expressed concern when GM's new sales and marketing chief Mark Reuss told GM-Volt he expects pure EVs to eventually obtain a larger market than EREVs.

“As (Volt) technology flows down to BEV in what will be smaller cars to carry smaller packs, that may be the higher volume play over a longer time,” he said.

It seems likely GM is expecting multiple healthy parallel markets including those for EREVs, BEVs, and plugin PHEVs.  As there are many subgroups of consumers each with their own specialized needs, offering options for all of them makes good business sense. This is especially true if costly common denominators such as lithium-ion packs can be eventually be brought to lower price points though economies of scale.

"In the end, the market will determine the winner and the technology that carries the day," Tony Posawatz told GM-Volt.com.

"Considering the effects of temperature and the real world on pure EV's, they will be limited for many years to come," he said.  "The concept of E-Flex or the flexible extended range electric vehicle will be much more than a bridging strategy."

"We are happy that the EREV will someday help to launch EVs into the market," he added.

Of course GM is limited by production capacity which is why multiple Voltecs aren't yet planned, and part of the reason the Cadillac Converj was cancelled.

Confirming this Bob Lutz conceded in a text message to Automotive News "the Volt and Ampera will use all available capacity for years to come."