efficiency of converting an energy source into electricity. The higher the conversion efficiency, the less energy "escapes" during conversion. The better the conversion efficiency, the less [..]

(cell or module)--The ratio of the electric energy produced by a photovoltaic device (under one-sun conditions) to the energy from sunlight incident upon the cell.

The ratio of the electric power produced by a solar panel to the power of the sunlight incident on the device.

The percentage of the input energy of a process that is converted to energy of the desired type.

This measure gauges the percentage of solar (light) power reaching a module that is converted into electrical power. Conventional cells now range in the high percentage teens. Theoretical and laboratory conversion rates typically are much higher than rates from mass production.

 The efficiency with which undesirable exhaust gases are reduced to acceptable levels or are converted to desirable gases.

The ratio of useful energy output versus the energy required to perform the process.