Heavy weight electrification coming
The California Air Resources Board (ARB) released an extended report on electrification of heavy-duty vehicles - Technology Assessment: Medium- And Heavy- Duty Battery Electric Trucks And Buses.
According to the draft, there are still less than 500 battery electric buses and medium- to heavy-duty trucks in California, although ARB sees growth:
"Overall, the assessment finds that BEVs are beginning to penetrate the medium- and heavy-duty vehicle markets. Battery electric transit buses are increasingly available from a variety of manufacturers. Some school buses are commercially available. Battery electric shuttle buses are also increasingly available, as are other medium-duty BEVs, primarily delivery vehicles. Currently, BEVS in the marketplace typically use lithium-ion battery chemistries. Class 8 heavy-duty trucks remain a significant challenge."
Interesting is the forecast on electric truck costs. According to CALSTART, in 2012 electric a truck with a 350 kWh battery was three times more expensive than a diesel truck, and by 2020 still will cost twice as much:
Table V-2: CALSTART Estimations of BEV Drayage Truck Costs Over Time