Darmstadt. In March 2011, three Citea SLF120Hybrid were delivered to the HEAG mobibus. Electric bus The Citea SLF Electric is a 12-meter-long, all-electric low-floor bus. The buyer can choose from various electric drives and battery packs. The Citea SLFA 181 Electric is an 18.1-meter-long, all-electric articulated bus. It was first presented to the public in May 2015 as part of the World Congress of UITP in Milan. In order to recharge the 1380 kg lithium ion battery with an energy content of 122.6 kWh in operation, the Citea SLFA Electric has a pantograph fast charging system. The pantograph is installed on the roof of the front car above the second axle. At the final stops they can be recharged with up to 250 kW charging power. The bus has 43 seats and 82 standing places. The Citea SLFA Electric is used since 2016, inter alia, on the E-bus line 133 of the Cologne transport operations (8 vehicles). At Hermes in Eindhoven, since December 2016, a total of 43 Citea SLFA-181 Electric articulated buses have been used under the brand name "Bravo". this is one of the largest electric bus fleets in Europe. Schiphol Busnet also uses these buses, as well as R-Net lines between Schiphol and Amsterdam/Haarlem. On 8 June 2020, as part of the efficiency mission in electric vehicles, R-Net 436 serving Rotterdam and the Dutch island of "Goeree-Overflakkee trialled out with a trailer hitched to the back of a VDL Citea SLF-120 consisting of electric batteries mounted on the roof. The trailer also known as a range extender which consists of a hydrogen tank which performs an endothermic chemical reaction with the use of fuel cells that power the electric motor. In order to save space in the main bus, the fuel cells and tanks are provided in the trailer rather than in the bus itself. With this technology, the buses can cover a range of up to 350 km. References External links Double-decker buses Low-floor buses Citea Vehicles introduced in 2007