Adverse effects of rising interest rates on sustainable energy transitions

Tobias S. Schmidt (), Bjarne Steffen (), Florian Egli (), Michael Pahle, Oliver Tietjen and Ottmar Edenhofer
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Tobias S. Schmidt: Energy Politics Group, ETH Zurich
Bjarne Steffen: Energy Politics Group, ETH Zurich
Florian Egli: Energy Politics Group, ETH Zurich
Michael Pahle: Potsdam-Institute for Climate Impact Research
Oliver Tietjen: Potsdam-Institute for Climate Impact Research

Nature Sustainability, 2019, vol. 2, issue 9, 879-885

Abstract: Abstract Increasing the use of renewable energy (RE) is a key enabler of sustainable energy transitions. While the costs of RE have substantially declined in the past, here we show that rising interest rates (IRs) can reverse the trend of decreasing RE costs, particularly in Europe with its historically low IRs. In Germany, IRs recovering to pre-financial crisis levels in 5 years could add 11% and 25% to the levelized cost of electricity for solar photovoltaics and onshore wind, respectively, with financing costs accounting for about one-third of total levelized cost of electricity. As fossil-fuel-based electricity costs are much less and potentially even negatively affected by rising IRs, the viability of RE investments would be markedly deteriorated. On the basis of these findings, we argue that rising IRs could jeopardize the sustainable energy transition and we propose a self-adjusting thermostatic policy strategy to safeguard against rising IRs.

Date: 2019
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DOI: 10.1038/s41893-019-0375-2

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