Carbon intensity update for 13th Nov 25

On 13th November 2025, the UK saw notable fluctuations in carbon intensity levels throughout the day. Monitoring carbon intensity helps households and businesses make energy-efficient choices, ideally using electricity when emissions are low to reduce environmental impact. Here’s a detailed breakdown of how carbon intensity varied across the day:

Carbon Intensity – Hour-by-Hour Overview

• Midnight to Morning (00:00 – 09:00): Carbon intensity stayed low, consistently under 85 gCO₂/kWh. The day began with an encouragingly clean energy mix at 64 gCO₂/kWh, indicating a high share of renewable energy during this period.
• Morning to Noon (09:00 – 12:00): Emissions remained in the low range but began a gradual rise, peaking at 98 gCO₂/kWh before noon as demand increased.
• Afternoon Hours (12:00 – 15:00): Carbon intensity moved into the moderate zone around midday. By 14:00, it reached 148 gCO₂/kWh, reflecting a reduced contribution from renewables and an increased reliance on fossil fuel sources.
• Evening Peak (15:00 – 19:30): The highest emissions of the day were recorded during the evening peak, when demand typically surges. Carbon intensity hit its maximum at 205 gCO₂/kWh, suggesting that coal or gas generators were likely brought online to meet the demand.
• Night-time Recovery (19:30 – 23:59): From 19:30 onwards, carbon intensity began to drop. It transitioned back into the moderate zone shortly after sunset and fell to just 69 gCO₂/kWh by midnight, signifying a return to cleaner energy sources as demand eased.

Why Carbon Intensity Matters

Understanding daily carbon intensity patterns empowers us to make smarter energy choices. By scheduling high-energy appliances—such as washing machines, dishwashers, or electric vehicle chargers—during low-intensity periods, we can help lower greenhouse gas emissions.

Spikes in carbon intensity often occur when renewable sources like wind and solar are insufficient to meet demand, causing grid operators to rely on backup fossil fuel generators. These moments significantly increase the carbon footprint of electricity.

By staying informed through updates like these, you can plan your energy use to align with cleaner times of the day. At Jaxi, we’re committed to keeping you updated so that we can all contribute toward a sustainable, energy-efficient future.

Check back daily for the latest updates on UK carbon intensity and discover how small actions can lead to big environmental impacts.