FAQ ›
Wind Turbine After 20 Years — Lifetime Extension or Repowering?
With the end of the 20-year EEG feed-in tariff, many operators face the question: Is it worth continuing to operate the existing turbine — or is repowering the better choice? The answer depends on technical condition, location, permitting situation and economic viability.
Lifetime Extension under §14 EEG
Since the EEG amendment, it has been possible to continue operating wind turbines after the end of the subsidy period and to market the generated electricity on the spot market or consume it directly. A prerequisite is proof of structural stability through a current stability assessment report.
Advantages
- Low investment risk — no new investment required
- Quick implementation without a new permitting process
- Sensible with good turbine condition and attractive location
- Can be combined with operational optimisation (azimuth, blade angle)
Disadvantages
- — Market price risk due to fluctuating electricity prices
- — Rising maintenance costs for older turbines
- — Limited remaining service life — structural stability must be proven
Repowering
In repowering, the existing turbine is replaced by a more powerful, modern wind turbine. §16b BImSchG enables simplified permitting procedures when the new turbine is erected at the same location. Energy yield increases significantly with the same footprint.
Advantages
- Significantly higher energy yield through modern turbine technology
- EEG subsidy for a further 20 years
- Improved profitability at attractive wind locations
- Simplified permitting procedure possible under §16b BImSchG
Disadvantages
- — High capital expenditure for new investment
- — More complex permitting process despite simplifications
- — Planning and implementation take several years
When is which option worthwhile?
| Situation | Recommendation |
|---|---|
| Turbine in good condition, structural stability verifiable | Consider lifetime extension |
| Windy location, good grid connection | Consider repowering |
| High maintenance costs, components worn | Repowering advisable |
| Uncertain permitting situation at the site | Prefer lifetime extension |
Stability Assessment Report as a Basis
A current stability assessment report is mandatory for lifetime extension. Reprojekt produces accredited reports that serve as the basis for regulatory approvals, insurance and financing decisions. We advise you independently — without manufacturer or operator interests.