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How cost-effective were subsidies for solar energy in Germany?

Author

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  • von Ditfurth, Jakob
  • Rausch, Sebastian

Abstract

We study Germany's photovoltaic (PV) subsidy program, estimating a dynamic model of new technology adoption which accounts for heterogeneity in residential ownership structures. We find that homeowner and landlord investors heavily discount future benefits, highlighting the suboptimality of the feed-in tariff structure and the inefficient use of government funds. The high administrative costs associated with tenant electricity contracts strongly discourage landlords from investing in new energy technologies. Our analysis suggests that policy design should prioritize upfront investment subsidies over feed-in tariffs to promote renewable energy adoption. Reducing administrative costs associated with tenant electricity programs is key to unlock investments by landlords and expand tenants' access to solar energy, thereby enhancing cost-effectiveness.

Suggested Citation

  • von Ditfurth, Jakob & Rausch, Sebastian, 2025. "How cost-effective were subsidies for solar energy in Germany?," ZEW Discussion Papers 25-018, ZEW - Leibniz Centre for European Economic Research.
    • Handle: RePEc:zbw:zewdip:319889
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    More about this item

    Keywords

    Renewable Energy; Subsidies; Germany; Households; Undervaluation; Cost-Effectiveness;
    All these keywords.

    JEL classification:

    • C51 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Model Construction and Estimation
    • D15 - Microeconomics - - Household Behavior - - - Intertemporal Household Choice; Life Cycle Models and Saving
    • Q48 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - Government Policy
    • Q58 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environmental Economics: Government Policy

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