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- W17860894 abstract "Traditional life cycle analysis and energy payback time studies on solar PV systems often give estimates that appear quite favorable—that the energy invested in building solar collectors can be paid back by the device within 1 or 2 years (e.g., Fthenakis and Alsema 2006; Fthenakis et al. 2011). If the collectors last for 25 years (the usual assumption) this gives a rough energy return on investment of 12.5:1–25:1, rather favorable ratios. But these analyses usually focus on only the core processes of ingot/wafer/cell/module manufacturing, although sometimes including the energy costs of the associated direct equipment (inverters, trackers, if any and metallic structures). In reality, the factors required to be able to deliver energy to society from a given energy production system go far beyond that and are related to each dollar spent on the project. The impetus for this study was the observations of the first author while being the Chief Engineer on several very large solar projects in Spain, when he began to wonder what kind of energy was being used to provide all the services and other components of the PV system. This led him to a series of beers with the second author, whom, he knew had experience with that issue, and, finally, this book." @default.
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- W17860894 date "2012-11-09" @default.
- W17860894 modified "2023-09-27" @default.
- W17860894 title "Methods: Calculating the Energy Input. The Energy Invested (EI or Ein)" @default.
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- W17860894 doi "https://doi.org/10.1007/978-1-4419-9437-0_6" @default.
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