UK grid operator cancels eclipse power notice
Analysis based on 37 articles · First reported Aug 12, 2026 · Last updated Aug 12, 2026
The cancellation of the margin notice signals that the grid operator expects sufficient capacity, reducing the risk of price spikes or emergency measures. The event highlights the growing impact of solar generation variability on grid operations, potentially influencing energy market trading and investment in flexibility.
The United Kingdom — National Energy System Operator (Neso) issued an electricity margin notice on Wednesday morning as a precautionary measure ahead of a solar eclipse expected to last about two hours, the fullest in decades. The notice called for additional generation capacity of around 676 megawatts to maintain a safety cushion between supply and demand during the evening peak. Neso cancelled the notice shortly after 2pm, indicating the precaution was no longer needed. The operator had been preparing for months, given the UK's increased reliance on solar power. Neso emphasized there was no risk to customer supplies. The last similar eclipse in 1999 caused a record swing in demand.
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