House of Lords dunkelflaute inquiry: security-of-supply lessons for grid engineers
Reviewed by Joe Ashwell

First reported on New Civil Engineer
30 Second Briefing
The House of Lords has launched an inquiry into “dunkelflaute” – multi-day periods of low wind and solar output – as the UK grid takes a larger share of variable renewables. Peers will examine how National Grid ESO plans to maintain security of supply during extended calm, overcast conditions, including the roles of long-duration storage, interconnectors and dispatchable plant. Civil and electrical engineers can expect scrutiny of network resilience assumptions, capacity adequacy margins and the cost–risk balance for backup infrastructure.
Technical Brief
- Outcome could harden regulatory expectations that major projects demonstrate resilience to multi-day grid stress in design safety cases.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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