What I do
Core services. Fixed scope. Lender-ready.
From raw met mast data to independent due diligence. Every deliverable is built to withstand PFC, REC, IREDA, or PE committee review.
Wind Resource Assessment
- Problem
- Lenders and IPP boards reject WRAs that can't be independently defended against PFC / REC / IREDA technical advisors.
- Solution
- MCP against ERA5 + MERRA-2, MEASNET-aligned QC, and WAsP / WindPRO flow modelling for every turbine position.
- Outcome
- A bankable WRA report lender technical advisors sign off without rework.
From ₹4L · 4–6 weeks
Read moreEnergy Yield Assessment
- Problem
- P50 / P75 / P90 numbers without a defensible uncertainty budget get shredded in lender review.
- Solution
- Full uncertainty propagation in quadrature: measurement, long-term, spatial, wake, and future losses itemised.
- Outcome
- P-values your lender's TA will underwrite and your insurer will accept.
From ₹4L · 4–6 weeks
Read moreMet Mast Data Analysis
- Problem
- Raw met mast CSVs arrive with icing gaps, sensor drift, and shadow effects that skew every downstream number.
- Solution
- 78-point MEASNET-aligned QC, gap-filling, and long-term reference via ERA5 / MERRA-2 / NIWE ground stations.
- Outcome
- Clean, defensible time series ready for EYA, bankability, or repowering decisions.
From ₹75k · 2 weeks
Read moreWind Farm Due Diligence
- Problem
- Lenders, PE funds, and acquirers can't afford to discover a 6% overstated P50 after signing.
- Solution
- Independent resource + yield + IEC 61400 + O&M + contractual red-flag review. 2-week fast-track available.
- Outcome
- A DD memo lenders and investment committees actually rely on, not a boilerplate.
From ₹3L · 2–4 weeks
Read moreAlso for layouts, finance and transactions, and operating wind farms
SCADA-based assessment of operating assets, refinancing, repowering, and M&A.
For Indian projects, see wind resource assessment in India.
What lands in your inbox
No black box. Every number is traceable.
A representative slice of what a typical WRA + EYA package contains. Real reports are site-specific, confidential, and delivered under NDA.
Directional frequency rose
12-sector frequency and mean-speed rose with long-term correction applied. Shipped as both chart and raw data table.
P50 / P75 / P90 AEP curve
Exceedance probability curve with full uncertainty propagation in quadrature. Lender-facing P90 is what sizes your debt.
Executive summary
P50 / P75 / P90
| P50 net AEP | ███ GWh |
| P75 net AEP | ███ GWh |
| P90 net AEP | ███ GWh |
| Net capacity factor | ██.█% |
Uncertainty budget
Bankable report: sample page
Executive summary, P-values, uncertainty budget. Full report runs ~80 pages with raw data archive and defence call.
Full 80-page redacted sample · no obligation · reply within one working day
How a project runs
Four steps. Four to six weeks. No surprises.
Scope is locked on day one. Progress check-ins every week. The only thing that changes between projects is the data, not the process.
Data intake
Raw met mast logger files, site coordinates, turbine OEM spec, and any existing studies.
- Logger CSVs
- Site coordinates
- Reanalysis window
- Turbine spec
Analysis
MEASNET-aligned QC, MCP long-term correction, and WAsP / WindPRO flow modelling for every turbine position.
- 78-point QC
- ERA5 + MERRA-2 MCP
- Flow model
- Wake calculation
Validation
Uncertainty propagation in quadrature, sensitivity checks, and independent peer cross-read before anything leaves.
- Uncertainty budget
- Sensitivity runs
- Peer cross-read
- IEC 61400 check
Delivery
Lender-ready report, raw data archive, and a live defence call with your technical advisor.
- Full PDF report
- Raw data archive
- Defence call
- Revision window
Lender-ready in 4–6 weeks
Send your met mast data for a free 30-min QC review.
Lender Memo Explorer
What the LTA is really checking
Select a risk area to understand what lenders' technical advisors scrutinise, and why it matters for your financing case.
Wind resource uncertainty is the biggest driver of P90 spread
Inter-annual variability and long-term correction quality together typically account for 60–70% of the total uncertainty budget. Short measurement campaigns with weak reference correlation are the most common reason debt cases fail LTA review.
Inter-annual variability
Typically 4–6% 1-sigma for onshore sites. Must be estimated from long-term reference datasets spanning at least 20 years.
MCP quality
Measure-Correlate-Predict correlation R² < 0.85 triggers LTA concern. ERA5 and MERRA-2 cross-validation improves confidence.
Campaign duration
Minimum 12 months required; 24+ months substantially reduces the long-term correction uncertainty component.
Micrositing Explorer
Layout choices change the energy case
Turbine placement affects both gross wind resource and wake losses. Explore how layout strategy shifts the net AEP, and therefore the debt case.
Uniform grid: maximum turbine count, unoptimised
Base Layout
Uniform grid placement prioritises turbine count over wake efficiency. The prevailing wind corridor bisects the array, creating deep wake chains that suppress net AEP despite high installed capacity.
Why not a Tier-1 consultancy
Same standard. Different cost structure.
Pay a Tier-1 firm ₹40–80L and wait 14 weeks for a report stitched together by a PM. Or work directly with a senior wind resource analyst who has personally reviewed every line of your data, for a fraction of the price, on a timeline that matches your financial close.
Delivered in 4–6 weeks
Same IEC + MEASNET depth. No internal approval cycles between your project and your report. You get the full package in weeks, not quarters.
Big firms: 12–16 weeks
Direct senior-analyst access
Every data point, uncertainty term, and red flag reviewed personally by the analyst on the project. No account manager, no offshore back office, no intern-written sections.
Big firms: account manager + PM + team
Productized, fixed-fee pricing
EYAs from ₹4L. DD reviews from ₹3L. Met mast QC from ₹75k. Scope locked on day one. Indian mid-market pricing, lender-grade methodology.
Big firms: "Contact us for quote"
Methodology is not the variable. Every report is built to MEASNET measurement standards and the IEC 61400 family. The variable is who reviews your data, and how long you wait.
Independent. India-fluent.
Get the EYA your lender's technical advisor won't send back.
About
Built for lender scrutiny,
not developer optimism
Vital Wind Insights is a specialist wind resource consultancy founded by Anirudh Sharma, a wind energy engineer with deep experience in bankable energy yield assessments and independent technical due diligence.
Every assessment is structured to pass independent technical review, because if the lender's technical advisor pushes back, the debt case unravels regardless of how strong the P50 looks. Methodology is transparent, uncertainty is honest, and conclusions are defensible.
- Wind flow modelling: WAsP, WindPRO, CFD
- Long-term datasets: ERA5, MERRA-2
- IEC 61400-1 site suitability (61400-3 for offshore)
- Extreme value analysis: Gumbel, POT methods
- Wake modelling: Jensen, Larsen, RANS
No developer ties, no turbine OEM contracts. The independence lenders require.
Full uncertainty budgets, P90 debt sizing, and LTA-ready methodology documentation.
Built to withstand technical advisor scrutiny at every step of the analytical chain.
Insights
Wind resource deep-dives
Ready for a wind case that holds up?
Whether you need an independent EYA, IEC 61400 site suitability assessment, or lender technical due diligence review, get in touch to discuss your project.
Book a scoping call →Anirudh Sharma · Wind Energy Consultant · Vital Wind Insights