sentence: Solar cells have many applications.
sentences_after: They have long been used in situations where electrical power from the grid is unavailable, such as in remote area power systems, Earth-orbiting satellites and space probes, consumer systems, e.g. handheld calculators or wrist watches, remote radiotelephones and water pumping applications.
concept_name: solar cell
headings: Solar energy Types of technologies Solar cells
categories: Astrophysics Solar energy Solar power