MARTIN BOND / SCIENCE PHOTO LIBRARY MARTIN BOND / SCIENCE PHOTO LIBRARY
Solar panels. Close-up of a solar facade of photovoltaic cells (blue) on the wall of an office building in Aachen, Germany. The solar panels on this office wall cover an area of 87 square metres. The total power output of these solar panels is 4. The photovoltaic cells contain a semiconducting material (in this case crystalline silicon) which converts sunlight directly into electricity. The panels are interspersed with light diffusing modules which allow some daylight into the building. Solar power is relatively cheap, as once the panels are installed they continue to produce electricity indefinitely.
Model release not required. Property release not required.