Carbon intensity update for 11th Oct 25

UK Carbon Intensity Update – October 11, 2025

On October 11, 2025, the UK experienced persistently high levels of carbon intensity throughout the day, signalling elevated CO₂ emissions per kilowatt-hour of electricity consumed. These figures highlight the ongoing challenges the national grid faces in balancing demand, especially when renewable sources like wind and solar are insufficient to meet peak usage.

Midnight Start – 195 gCO₂/kWh
The day began with high carbon intensity, recording 195 grams of CO₂ per kWh at midnight. While this was slightly above forecasted values, it set the tone for a carbon-heavy day.

Morning Peak – 220 gCO₂/kWh
By 7:00 AM, levels surged to 220 gCO₂/kWh. This spike is often linked to increased energy demand as the country wakes and begins its daily activities — a time when fossil fuel generators may be called upon to bridge the gap left by low renewable output.

Daytime Plateau – 190 to 212 gCO₂/kWh
Between 8:00 AM and noon, carbon intensity remained consistently high, fluctuating between 190 and 212 gCO₂/kWh. This period reflects ongoing energy consumption without a significant uptick in clean energy availability.

Evening Spike – 245 gCO₂/kWh
The most notable surge occurred at 5:30 PM, where levels peaked at 245 gCO₂/kWh. With renewable sources likely exhausted and demand increasing during the post-work period, the reliance on fossil fuel-generated electricity became more pronounced.

Late Night Decline – Still High
After 9:00 PM, a modest decrease in carbon intensity was observed, though values remained within the high emissions category.

Why It Matters
High carbon intensity days like this serve as a reminder of our dependence on carbon-heavy electricity, especially during peak times. When demand surges and clean sources can’t keep up, generators often resort to using coal, gas, or other fossil fuels—resulting in more CO₂ emissions per kilowatt-hour.

Smarter Energy Planning
Monitoring daily carbon intensity helps consumers make informed decisions about when to run high-energy appliances. By shifting usage to periods when renewable energy contribution is higher, we can collectively reduce the load on fossil fuel sources and lower overall CO₂ emissions.

At Jaxi, we’re committed to helping you stay informed about your energy footprint. Stay connected for daily updates and learn how small changes in energy habits can contribute to a more sustainable future.

Learn more about reducing your carbon impact today.