Back Alimentació pel sòl Catalan Alimentation Par Sol Czech Alimentation par le sol German Grund-nivela elektro-prizorgo Esperanto Alimentación por el suelo Spanish Alimentation par le sol French Stream (trasporti) Italian 地表集電方式 Japanese Alimentation par le sol Dutch Alimentacion pel sòl Occitan
Ground-level power supply, also known as surface current collection or, in French, alimentation par le sol ("feeding via the ground"), is a concept and group of technologies whereby electric vehicles collect electric power at ground level from individually-powered segments instead of the more common overhead lines. Ground-level power supply was developed for aesthetic reasons, to avoid the presence of overhead lines in city centres.
Ground-level power supply systems date to the beginning of electric tramways, with some of the earliest such systems using conduit current collection. Since the turn of the 21st century, systems such as the Alstom APS, Ansaldo Tramwave, CAF ACR, and Elways have been introduced that use modern technology to eliminate some limits and dangers of the older systems, and to supply power for buses, trucks, and electric cars. With the increased efficiency and energy density of capacitor- and battery-powered systems, ground-level power supply systems are used in smaller portions of the line to charge batteries—for example, during station stops for buses and trains.