Re-assessment of net energy production and greenhouse gas emissions avoidance after 40 years of photovoltaics development

Atse Louwen (), Wilfried G. J. H. M. van Sark (), André P. C. Faaij and Ruud E. I. Schropp
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Atse Louwen: Copernicus Institute of Sustainable Development, Utrecht University
Wilfried G. J. H. M. van Sark: Copernicus Institute of Sustainable Development, Utrecht University
André P. C. Faaij: Energy & Sustainability Research Institute, University of Groningen
Ruud E. I. Schropp: Plasma & Material Processing, Eindhoven University of Technology (TU/e)

Nature Communications, 2016, vol. 7, issue 1, 1-9

Abstract: Abstract Since the 1970s, installed solar photovoltaic capacity has grown tremendously to 230 gigawatt worldwide in 2015, with a growth rate between 1975 and 2015 of 45%. This rapid growth has led to concerns regarding the energy consumption and greenhouse gas emissions of photovoltaics production. We present a review of 40 years of photovoltaics development, analysing the development of energy demand and greenhouse gas emissions associated with photovoltaics production. Here we show strong downward trends of environmental impact of photovoltaics production, following the experience curve law. For every doubling of installed photovoltaic capacity, energy use decreases by 13 and 12% and greenhouse gas footprints by 17 and 24%, for poly- and monocrystalline based photovoltaic systems, respectively. As a result, we show a break-even between the cumulative disadvantages and benefits of photovoltaics, for both energy use and greenhouse gas emissions, occurs between 1997 and 2018, depending on photovoltaic performance and model uncertainties.

Date: 2016
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DOI: 10.1038/ncomms13728

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