If you operate a public transportation fleet, cost is a critical factor. Over millions of miles, a difference of a penny or two per mile can add up to serious money. All electric buses tend to cost more to buy but are expected to cost less to operate over their anticipated 12 year useful life. Is that assumption accurate?
A new study by the National Renewable Energy Lab tabulated data collected by Proterra electric buses operated by Foothill Transit in southern California and other buses in the Foothill fleet that were powered by compressed natural gas. The results show the Proterra buses were up to 8 time more efficient than their CNG powered cousins.