Remaining Useful Life,
Backed by Evidence.

Every repowering decision hinges on one question: how much of the asset's design margin is actually left. Without a measured loading history, that answer defaults to conservative assumptions — the kind that can sink a deal or force an early decommission. Continuous structural monitoring gives you the as-operated data to answer it directly.

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The Diligence Gap

Original design assumptions cover an asset's worst probable operating conditions — not what it actually experienced. At end of OEM design life, that gap becomes the central question in every repowering or life-extension decision, and most operators have no measured loading history to answer it. The default is conservative assumptions, applied uniformly across a fleet regardless of how any individual asset actually performed.

The regulatory ground is shifting under this too. IEC 61400-6 Amendment 1 (2025) moves tower and foundation fatigue assessment from design-based safety toward condition-based compliance, and DNV-ST-0126 explicitly identifies structural health monitoring data as a basis for remaining-useful-life determination. Without a baseline, the standards default to the conservative case — the one that shortens an asset's usable life on paper, whether or not it happened in practice.

1 Hz SCADA resolution

SCADA captures tower data, but at 1 Hz it can't see beyond Mode 1 lock-in. Mode 2 and Mode 3 VIV events carry higher fatigue loads and are invisible to it entirely — which means the loading history most fleets already have isn't sufficient to support a life-extension case on its own.

What a Measured Loading History Provides

The Datum device produces continuous, as-operated structural data — the record that's missing when a fleet's life-extension case rests entirely on original design margins.

Evidence for the decisions that follow design life.

Remaining Useful Life As-operated loading history in place of the conservative default assumed when no baseline exists
Repowering & PPA Decisions Defensible data for the investment committee, not a one-time inspection snapshot
Insurance & Underwriting Measured behaviour gives underwriters something real to price at the point of acquisition
Data Ownership The loading history is yours outright — portable across advisors, lenders, and future transactions

MEASURED vs. ASSUMED

DATA

VIV resolution Mode 1, 2 & 3

Sample rate 32 Hz

Data ownership Yours, outright

REGULATORY CONTEXT

IEC 61400-6 Amd. 1 2025

DNV-ST-0126 SHM basis Referenced

Consultant required No

Stratum Dynamics currently has an active continuous monitoring deployment on an operating Canadian wind asset. Early field learnings from that deployment inform how we structure loading-history data for repowering and life-extension review.

Evaluating a repowering or life-extension decision

Talk to us before the diligence deadline

Whether you're underwriting an acquisition, advising on a PPA renewal, or building the case for life extension across a fleet, we can walk you through what continuous structural data adds to the file.