Nov 19

New ViriCiti report sheds light on how electric buses distribute energy between traction engine and accessories

Some e-buses distribute up to 10% more energy to the motor, which can mean more miles on the road.



Greenville, November 2020 – ViriCiti launches a new report on the energy distribution of electric buses. The report analyzed data from 375 electric buses from 4 different OEMs, which are in service across 14 different public transit operators and agencies active in both the US and Europe.

Knowing how much energy goes towards moving the bus versus to its accessories can help operators to better plan daily operations and future investments. Therefore, ViriCiti used its rich database of historical e-bus data and looked at the following key ratios:


  • energy used in service versus idling,
  • energy consumed driving versus regenerated,
  • energy used by e-bus accessories versus traction motor,
  • and overall efficiency.



Differences across OEMs

ViriCiti found that there are significant differences in how different fleets use energy while in service. However, most fleets analyzed in this report had a similar ratio of energy used in service vs. not in service, as well as energy consumed driving and regenerated. On average, the data shows that 76.5% of the energy is consumed driving and 23.5% is regenerated.

The most striking difference can be seen in how 2 different OEMs distribute energy towards accessories versus traction motors. The e-buses from one manufacturer tend to distribute almost 10% more energy to the traction motor than the other. In practice, this could mean thousands of extra miles on the road. This is also visible in the efficiency differences, where the accessories of OEM A consumes around 50% more than the accessories of OEM B.

The full report is accessible for free on our reports page.




About ViriCiti

ViriCiti started in 2012 with a focus on electric buses and trucks and is now market leader in the United States and Europe, with over 3500 buses and chargers connected to its platform. Recently we have launched the largest Smart Charging project in the world, outside of China. ViriCiti has integrated with a number of charging station manufacturers, including Tritium, Proterra, ABB, Siemens, Heliox, and many more. Also, our solutions are used by more than 200+ fleet operators and OEMs worldwide, including trailblazing public transport agencies such as BVG, Keolis, Toronto Transit Commission (TTC), New York MTA, LA DoT, and Transdev. Find more at 

Press Contact & Information:

Cristiana Stoian | |

About The Author

Cristiana Stoian, Communications Manager and ViriCitizen