The energy analysis field of study is credited with being popularized by Charles A. S. Hall, a Systems ecology and biophysical economics professor at the See more

Photovoltaic
The issue is still subject of numerous studies, and prompting academic argument. That's … See more

The natural or primary energy sources are not included in the calculation of energy invested, only the human-applied sources. For example, in the … See more

In a 2010 paper by Murphy and Hall, the advised extended ["Ext"] boundary protocol, for all future research on EROI, was detailed. In … See more

EROI and Net energy (gain) measure the same quality of an energy source or sink in numerically different ways. Net energy describes the … See more

Although many qualities of an energy source matter (for example oil is energy-dense and transportable, while wind is variable), when the EROI of the main sources of energy … See more

EROI is calculated by dividing the energy output by the energy input. Measuring total energy output is often easy, especially in the case for an electrical output where some appropriate electricity meter can be used. However, researchers disagree on how to determine … See more