Alle Storys
Keine Story von Universität Mannheim mehr verpassen.

Universität Mannheim

Renewable energy sources are more profitable than ever

Renewable energy sources are more profitable than ever

Investments in wind and solar power sources have long been considered as expensive and dependent on public subsidies. A new study by economists from the University of Mannheim shows that plants in good locations can now be operated profitably without subsidies. The reason for this: cost reductions through technological innovations have been able to overcompensate countervailing dynamics in the revenues of renewables.

Driven by government subsidies, the share of renewable energy in the electricity mix has been rising for years. The German Federal Environment Agency, for instance, recorded a share of 49 percent for the first half of 2022, an increase of around eight percentage points from the previous year.

However, subsidies for new wind and solar power plants have fallen drastically in recent years. At the same time, renewables are increasingly subject to a “cannibalization” effect in places where significant additions of wind or solar power capacity cause market prices to fall during hours when renewable sources are near peak capacity. Accordingly, industry analysts have warned about the possibility of wind and solar energy not becoming competitive with conventional power generation technologies for a long time.

A new study by the economists Prof. Dr. Gunther Glenk and Prof. Stefan Reichelstein, Ph.D. from the University of Mannheim now clears the doubt. Over the past decade, the costs of new wind and solar photovoltaic installations have declined much faster than the corresponding revenues. This dynamic has led to an increase in the profitability of renewables and has even made wind and solar plants in good locations the most profitable technologies for generating electricity.

The cost reductions are based on so-called learning effects that measure the rate of technological progress for wind and solar energy sources. "Each installed system provides learning experiences that lead to cost reductions, which, in turn, lead to further capacity deployment. Such cycles are crucial for the speed of the energy transition," Prof. Glenk outlines.

As part of the study, the economists first introduced a profitability metric that captures the relevant unit economics of both renewable and conventional power sources on a life-cycle basis. This metric was then calibrated based on data for wind, solar photovoltaic, and natural gas power plants built in California and Texas between 2012-2019. The two states in the U.S. serve as prime examples in the study, since California has primarily expanded solar power plants over past decade, while Texas has focused on wind energy.

A contributing factor for the favorable results for renewables is that the competitiveness of natural gas-fired power plants increased less or remained stable over the 2012-2019 period. For instance, gas power plants in California have experienced higher average cost on account of their lower capacity utilization rates. Yet, this effect was counterbalanced by the plants earning a price premium for the electricity they produced at times of weak renewable power generation. "Conventional power plants produce less energy but can sell it at higher prices than before," Prof. Reichelstein explains the phenomenon.

High prices for fossil fuels, as currently observed, reinforce the findings of the study. "A rapid expansion of wind and solar power sources now offers the opportunity to both reduce greenhouse gas emissions and provide sustainable and economically viable remedies to the current energy crisis," Prof. Glenk concludes.

Link to the original publication in Renewable & Sustainable Energy Reviews:


Stefanie Burgahn
Mannheim Institute for Sustainable Energy Studies (MISES)
University of Mannheim
Phone +49 621 181 1712
Saskia Bachner
Press Officer International Communication
University of Mannheim
Tel: +49 621 181 1434
Weitere Storys: Universität Mannheim
Weitere Storys: Universität Mannheim
  • 20.04.2022 – 09:32

    Why hydrogen is already an economical energy source

    Why hydrogen is already an economical energy source At peak times, hydrogen can be an economically viable addition to electricity supply - provided that the hydrogen is converted on so-called reversible power-to-gas storage systems. This is the result of a new study by Mannheim economists Professor Stefan Reichelstein, Ph.D., and Professor Dr. Gunther Glenk. In their study, which was published in Nature Communications, ...

  • 21.02.2022 – 10:57

    First Guidebook of Pro-Government Militias Worldwide

    First Guidebook of Pro-Government Militias Worldwide Conflict researcher Sabine Carey of the University of Mannheim developed the first online catalog containing extensive information on over 500 pro-government militias worldwide. Pro-government militias are organized, armed groups that support governments without being part of the formal security apparatus. Whether it’s in the Balkan countries, Afghanistan, or many ...

  • 06.08.2021 – 12:55

    Dollarisation Does Not Go Hand In Hand With Heightened Financial Market Risks, Study Says

    Dollarisation Does Not Go Hand In Hand With Heightened Financial Market Risks, Study Says Financial Dollarisation in emerging market economies does not necessarily lead to more vulnerability in the respective financial system, according to a recently published study with the participation of the University of Mannheim. “The common view that financial dollarisation ...