• Energy Research
• 11. Sustainability close

Wind energy repowering decisions are multifaceted and depend on the physical, political and social landscape, as factors such as noise regulation, aesthetics and political bargaining can significantly influence project development. Policy should recognise that a technology perspective alone cannot inform implementation pathways and should be supplemented with an understanding of the political and social dimensions.

Wind energy repowering decisions are multifaceted and depend on the physical, political and social landscape, as factors such as noise regulation, aesthetics and political bargaining can significantly influence project development. Policy should recognise that a technology perspective alone cannot inform implementation pathways and should be supplemented with an understanding of the political and social dimensions.

Abstract Nations today are urgently challenged with achieving a significant increase in the deployment of renewable energies. In Europe that need has given rise to a debate about the most effective and efficient support strategy. Whilst the different interests debate whether full European harmonisation or strengthening of national support policies for electricity from renewable energy sources (RES-E) is the best way forward, individual national support schemes are rapidly evolving. This study investigates how the EU member states have applied support policy types over the last decade. By identifying predominant developments in the application of feed-in tariffs, premiums, tradeable green certificates, tax incentives, investment grants, and financing support for specific technologies (wind, biomass, PV), this study shows that Europe is currently experiencing certain tendencies towards a ‘bottom-up’ convergence of how national policy-makers design RES-E policy supports. While some outliers remain, the policy supports of most countries become more similar in the policy types applied (dominance of feed-in tariffs) and in their scope of implementation (differentiation for installation sizes and ‘stacking’ of multiple instruments). These trends in national decision-making, which show tendencies of convergence, could make an EU-driven ‘top-down’ harmonisation of support either dispensable or at least (depending on the agreement) less controversial.

Abstract Nations today are urgently challenged with achieving a significant increase in the deployment of renewable energies. In Europe that need has given rise to a debate about the most effective and efficient support strategy. Whilst the different interests debate whether full European harmonisation or strengthening of national support policies for electricity from renewable energy sources (RES-E) is the best way forward, individual national support schemes are rapidly evolving. This study investigates how the EU member states have applied support policy types over the last decade. By identifying predominant developments in the application of feed-in tariffs, premiums, tradeable green certificates, tax incentives, investment grants, and financing support for specific technologies (wind, biomass, PV), this study shows that Europe is currently experiencing certain tendencies towards a ‘bottom-up’ convergence of how national policy-makers design RES-E policy supports. While some outliers remain, the policy supports of most countries become more similar in the policy types applied (dominance of feed-in tariffs) and in their scope of implementation (differentiation for installation sizes and ‘stacking’ of multiple instruments). These trends in national decision-making, which show tendencies of convergence, could make an EU-driven ‘top-down’ harmonisation of support either dispensable or at least (depending on the agreement) less controversial.

Decarbonizing Europe by 2050 requires significant capital investments in renewable energy (RE). The weighted average costs of capital (WACC) greatly impact RE production costs and influence the government support payments needed for the financial viability of RE projects. Reducing the risks for RE investors can decrease WACC and ensure that the EU meets its climate targets at the least cost. We investigate the potential for lowering support payments to RE projects by de-risking financing conditions through measures including revenue stabilization and low-risk auction designs for solar PV and onshore wind across 21 countries in Europe. We find that de-risking debt is almost twice as effective as de-risking equity. On average, support payments can be reduced by 3.3 EUR/MWh and 1.9 EUR/MWh, respectively, and in some cases, fall to zero. The effects differ across countries, higher-risk countries like Greece would experience more significant benefits from de-risking than lower-risk countries like Denmark and Germany, where support costs depend more on investment variables such as capacity factors. Overall, we show that WACC depends largely on country risk. Nonetheless, de-risking policies like revenue stabilization can improve the investment climate for RE, reduce the need for government support, and contribute to achieving decarbonization targets.

Decarbonizing Europe by 2050 requires significant capital investments in renewable energy (RE). The weighted average costs of capital (WACC) greatly impact RE production costs and influence the government support payments needed for the financial viability of RE projects. Reducing the risks for RE investors can decrease WACC and ensure that the EU meets its climate targets at the least cost. We investigate the potential for lowering support payments to RE projects by de-risking financing conditions through measures including revenue stabilization and low-risk auction designs for solar PV and onshore wind across 21 countries in Europe. We find that de-risking debt is almost twice as effective as de-risking equity. On average, support payments can be reduced by 3.3 EUR/MWh and 1.9 EUR/MWh, respectively, and in some cases, fall to zero. The effects differ across countries, higher-risk countries like Greece would experience more significant benefits from de-risking than lower-risk countries like Denmark and Germany, where support costs depend more on investment variables such as capacity factors. Overall, we show that WACC depends largely on country risk. Nonetheless, de-risking policies like revenue stabilization can improve the investment climate for RE, reduce the need for government support, and contribute to achieving decarbonization targets.