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United KingdomEnergy and utilities2025 – ongoing

National Energy System Operator

Quartz Solar forecasting in the electricity control room

NESO integrated AI solar forecasts into control-room operations, with its supplier reporting 2.8 times greater accuracy

WorkingVendor case studyVendor ↗

Problem

Weather forecasts updated every few hours could miss rapid changes in cloud cover and solar output. NESO needed better short-term predictions for grid balancing.

Approach

Open Climate Fix developed Quartz Solar with NESO's forecasting team. It combined machine learning with satellite imagery and weather data, refining forecasts minute by minute. Following testing, NESO integrated it into scheduling and real-time control.

Results

2.8 timesforecast accuracy relative to previous methods, according to Open Climate FixVendor case study[1]

Takeaway

Forecast accuracy and financial savings were different measures: the supplier reported fewer large errors, while annual avoided costs were estimates.

Categories

Business function
Production and quality
Innovation type
Process innovation
Evidence
Vendor case study

Sources

Source summaries

[1]Open Climate Fix6 Nov 2025

Open Climate Fix reported operational integration and halved large forecasting errors. It estimated annual avoided imbalance costs of £30 million.

Full details are in the original sources.

Added 1 Nov 2026 · Updated 1 Nov 2026
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