Solaris Bus & Coach sp z o.o. is a Polish manufacturer of public transport vehicles, with its headquarters in Bolechowo-Osiedle near Poznań. It is a subsidiary of Spanish rolling stock manufacturer CAF with a market share for electric buses in Europe of about 18%.

A trolleybus is an electric bus that draws power from dual overhead wires using spring-loaded trolley poles. Two wires, and two trolley poles, are required to complete the electrical circuit. This differs from a tram or streetcar, which normally uses the track as the return path, needing only one wire and one pole. They are also distinct from other kinds of electric buses, which usually rely on batteries. Power is most commonly supplied as 600-volt direct current, but there are exceptions.