life and technology DD


understand technical risks and opportunities

nabla wind hub’s approach for supporting technical due diligences, in both vendor or acquisitor positions, offer key inputs for decision-makers supported by a solid methodology and strong expertise.

In the vendor side

Nabla has the methodologies and technology to unveil the life extension and performance improvement potential of the wind assets subject to rotation, and accompany the vendor for defending these assessments in the bidders sessions and Q&A. In this context there is normally time to run loads simulations, perform inspections and run reliability models.

The typical nabla will build the vendor TDD for wind assets based on:

  1. Exploratory Life Analysis (P80), to map the fatigue related risks in the long term and deploy preventive strategies for its delay or mitigation. This analysis can also unveil performance improvement potentials through tailor-made retrofits/partial repowering.
  2. Reliability Models, to map the random and non-fatigue related risks, so to complete the Exploratory Life Analysis picture.
  3. Life extension inspections (visual check in particular key points related to life extension programs).

In the acquisitor side

Lead times become critical, and there is normally no time for running loads calculation for all the assets under evaluation, in such case nabla provides the following approach:

  1. EYA review, identifying Technology/setup risks and mitigations
  2. WTG design review, identifying Technology/setup risks and mitigations
  3. WTG life expectancy (type vs site) giving a high level map of failure rates, fatigue and random events, plus recommended preventive actions. If lead time allows it nabla will recommend a representative part of the portfolio to be analysed under Exploratory Life Analysis.
  4. Review of CAPEX/OPEX Financial model assumptions
  5. Review of Vendor\'s life report, if any
  6. VDR GAPs, red flags, Q&A, meetings if needed, reports

This methodology can be applied to:

  1. Existing wind farms.
  2. Repowering: finding the best moment for such, so we can also analyse the existing asset to see it’s advisable to delay the repowering.
  3. Partial repowering.
  4. Greenfields and
  5. Co-location hybridisation with PV: where nabla will check that the wind farm will live enough to justify the PV CAPEX, and if we have time, how some curtailments when the peak is higher than the permitted benefit the life of the WTGs.