MAN Lion's City hybrid bus in Barcelona

A large percentage of Barcelona's metropolitan buses are either hybrid (diesel+electric) or run with natural gas, with full electric and hidrogen engines still being implemented.

This is a Man Lion's City hybrid bus with
Ultracapacitor storage system
The 12 modules each with 24 cells achieve a maximum charge/discharge capacity of 200 kW. The energy content is approximately 0.4 kWh.
The MAN hybrid bus consumes up to 30 percent less fuel and therefore saves up to 10,000 litres of diesel fuel per year — a result also reflected in CO2 emissions: the MAN Lion's City Hybrid pollutes the environment by up to 26 tons CO2 less per year than comparable city buses with conventional motorisation.

http://www.bus.man.eu/global/en/city-...