According to Navigant Research, fleets will soon be buying hybrid and plug-in trucks in volume.

Boulder Electric Vehicle Trucks

Boulder Electric Vehicle Trucks

"While hybrid, plug-in hybrid, and battery electric drivetrains have successfully penetrated the light duty passenger vehicle market, the commercial truck market has proven to be more of a challenge. Government stimulus spending from 2008 to 2011 spurred R&D, production, and deployment of hybrid and plug-in commercial trucks, but demand has only recently begun to grow. According to a new report from Navigant Research, nearly 350,000 light, medium-, and heavy-duty hybrid and electric trucks will be sold in the global commercial fleet market from 2013 through 2020."

There's no break out for only plug-in trucks in this Navigant report, bus as we've seen, the plug-in route typically makes more sense in the commercial sector than does a conventional hybrid.

And then there's this from Navigant, which seems to reinforce the idea that most of these purchases will be of trucks that do indeed lug in:

"In addition to expanded availability of lower priced vehicles, the keys to growth in this market, according to the report, will be rising prices for conventional fuels and added value to fleet operators from, for example, using vehicle batteries to provide onsite power and to eliminate engine idling."

It's all about operating costs when it comes to fleet usage.  So, as plug-in trucks become more affordable, the choice to switch from either gas, diesel or natural gas over to plug ins will be a no-brainer.

Source: Navigant