sentence: Solar cells have many apps.
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. More recently, they are starting to be used in assemblies of solar modules connected to the electricity grid through an inverter, often in combination with a net metering anger magnegment.
concept_name: solar cell
headings: Solar cell Solar cells applications
categories: Solar energy Electronic components Electricity