A system (10) for supplying energy is provided. The system (10) comprises a shelter (12) for a passenger awaiting transport. The shelter (12) has a roof portion (14) and photovoltaic cells (16) disposed on the roof portion (14). The photovoltaic cells (16) are arranged to convert solar energy into electrical energy. The system (10) also comprises an energy distribution system (18) arranged to receive electrical energy from the photovoltaic cells (16) and to provide the electrical energy to at least one electrically powered component (20, 22, 24, 26, 28, 30, 32, 34) of the system (10).