they are used for generating electricity
solar cells
They aren't needed, most calculators use batteries not solar cells.
They all use solar energy
Electricity generated by the sun with the use of Solar Panels. They use Solar cells to convert sun light into electric energy
solar powered cars
No, solar energy and solar cells are not the same, although sometimes people do use the phrases as though they were interchangable. Solar energy is energy that is transferred from the sun to the earth. Solar cells are devices that turn energy from the sun into photovoltaic energy that we can use.
Solar energy is recovered through the use of solar panels, which contain photovoltaic cells that convert sunlight into electricity. These cells absorb photons from the sunlight, which then create an electrical current that can be used to power various devices or stored in batteries for later use.
Some governments use solar energy to power offices. Communication and military satellites are powered by solar cells.
photovoltaic
Solar energy is produced by the sun's rays, which are converted into electricity through the use of photovoltaic cells or solar thermal systems. Photovoltaic cells directly convert sunlight into electricity, while solar thermal systems use sunlight to generate heat that can be used to produce electricity.
Use the wind, a windmil. Use the water, a water turbine. And use the sun, solar cells (a solar panel)
Solar cells capture the energy in light and use it to power the calculator.