The first European pilot Chariot e-bus project was launched by the Mayor of Sofia on 19th May 2014 and was completed in October 2015.
The Chariot e-bus was equipped with 20 kWh ultracapacitor and was running in regular service on Line 11 with a one-direction length of 11.2 kilometres.
The line was served by two 150 kW DC/DC charging stations, each located at one of the bus terminals, with charging time of 8 minutes.
Demonstrated for the first time in Europe the operational robustness of the Chariot e-bus and enabled the verification of its unprecedented low energy consumption and operational advantages.
Scrutinised by the leading European laboratory for testing of electric buses, Landshut University, Germany. The results proved the ultracapacitor technology to be the most efficient energy storage technology and the most suitable for application in fast charging electric buses.