Wind Turbine Repowering in Germany

Repowering means replacing older wind turbines with modern, higher-capacity units at the same or nearby site. The German market is the largest in Europe — driven by ~6,500 turbines reaching end-of-EEG-funding between 2025–2027.

Typical Configuration

The Repowering Process — 7 Phases, 24–36 Months

1. Site assessment (1–3 months): wind data, regulatory framework, environmental factors
2. Turbine selection & lease negotiation (3–6 months)
3. Permit planning (6–12 months): all mandatory expert reports — bird survey is the critical path (one full season minimum)
4. BImSchG permit application (4–18 months): simplified procedure 4–8 months, formal procedure with EIA 18+ months
5. EEG auction (parallel): after permit, participation in Bundesnetzagentur quarterly auctions
6. Dismantling & construction (8–14 months)
7. Commissioning & market entry (2–4 months)

Regulatory Framework

• BImSchG — Federal Immission Control Act, primary permit framework
• EEG 2024 — 20-year market premium, current ceiling 7.35 ct/kWh, auction-based
• WaLG (2022) — federal states must designate 2.2% of land area for wind by 2032; non-compliance suspends concentration zone effects
• § 35 BauGB — privileged status in outdoor areas since 1996
• § 44 + § 45b BNatSchG — species protection with standardized taboo radii for 15 collision-prone bird species

Economic Indicators (2026)

• CAPEX: 1,200–1,700 EUR/kW (repowering 5–10% lower than greenfield)
• OPEX: 20–30 EUR/MWh (typical full-service maintenance contract)
• LCOE: 40–95 EUR/MWh depending on site quality
• IRR: 7–10% typical for repowering projects
• WACC: 4–5% (senior debt 70–80%, equity 20–30%)

Cost Comparison: Repowering vs. Continued Operation

Example for an 8 × 1.5 MW park, EEG ending 2022:

Critical Bottlenecks in 2026

• Turbine delivery: 12–18 months lead time from major manufacturers (Vestas, Enercon, Nordex, Siemens Gamesa)
• Expert offices: accredited acoustic and species-protection consultants are 8–14 months backlogged
• Approval authorities: in Brandenburg, Schleswig-Holstein, Lower Saxony — heavily loaded

Quick Check: Is Your Wind Farm a Repowering Candidate?

Not every ageing wind farm is a good repowering case. Six factors decide whether a site leans toward repowering or toward simply keeping the existing turbines running a few more years.

The more rows fall in the left column, the stronger the economic case for full replacement rather than a continued-operation extension. Sites with old, small turbines on windy land almost always repower more profitably than they keep running — the reverse is true for younger, already large turbines on marginal wind sites.

Three Paths After EEG Funding Ends

Once a turbine's 20-year EEG remuneration period expires under Section 25 of the EEG, its owner faces three options that differ sharply in economics and permitting effort. Continued operation keeps the existing hardware running and sells the electricity via a PPA or on the spot market; German guidance (DIBt) requires a continued-operation assessment that verifies the remaining structural lifetime of load-bearing components before this path is permitted. Decommissioning without replacement is the exception, usually chosen only where the site or the lease cannot continue at all. Repowering replaces the old turbines with a small number of modern, far more productive ones, and at windy sites with spare land it is almost always the most profitable route by a wide margin. The detailed trade-off between continued operation and repowering is covered on Repowering vs. Continued Operation; what full decommissioning actually involves — obligations, cost, and recycling — is covered on Decommissioning.

Timing matters here more than owners expect: the BImSchG permit must already be in hand before a project can bid into a Bundesnetzagentur auction, and only a winning bid fixes the applicable remuneration value for the following 20 years. Projects that get the sequence wrong — bidding before the permit is final, or permitting without lining up an auction round — risk months of idle capital. A first read on likely yield and cost of electricity comes from our calculation tools; the formal procedure type is best clarified early with the engineering office handling the BImSchG application.

Repowering Topics in Detail

Common Questions

Can I get EEG remuneration for a repowering project?

Yes — repowering projects compete in the BNetzA auctions like new builds. No separate "repowering bonus" exists since 2017.

What about south Germany?

Bavaria's 10H rule (10× total height as minimum distance) restricts repowering, but the WaLG could suspend it if the state misses its 2027 land-area target. Watch the regulatory development closely.

What financing structures are typical?

Project finance with 70–80% senior debt from specialized German energy banks (NORD/LB, KfW IPEX, Bayern LB), 20–30% equity from sponsors, mandatory citizen participation in MV, BB, NRW.