Energy consumption of city buses down by 40 percent since 2019
22.08.2025 – The use of e-buses has reduced the total energy consumption of Stadtwerke Offenbach's city bus fleet by around 40 percent. The fleet's average energy consumption per 100 kilometers driven has fallen from around 500 kilowatt hours in 2019 to around 320 kilowatt hours in 2024.
While a diesel bus consumes an average of 500 kilowatt hours of energy over a distance of 100 kilometers, the energy consumption of e-buses is around 150 kilowatt hours per 100 kilometers.
Last year, the 36 Offenbach e-buses covered a total of 1,562,000 timetabled kilometers. This corresponds to around 46 percent of the total mileage of Offenbach's city bus fleet in 2024. The lower energy consumption of the e-buses saved 312,400 kilowatt hours of energy in line operation.
Significantly fewer emissions
Emissions have also been significantly reduced by using the 36 Offenbach e-buses compared to diesel buses: 2,376 tons of CO2, 634 kilograms of nitrogen (NOx) and 40 kilograms of particulate matter were emitted less.
The first seven electric buses in the Stadtwerke fleet were put into operation back in December 2020, with 29 more electric buses gradually following in 2021. Since the timetable change in December 2021, 36 e-buses have been in operation on Offenbach's city bus routes. Almost half of the fleet now runs on electricity. The electrification of the city bus fleet contributes to the city of Offenbach's clean air plan.