Carbon intensity update for 27th Oct 25

UK Carbon Intensity Update for October 27, 2025

On October 27, 2025, the carbon intensity of electricity generation in the UK showed significant fluctuations throughout the day, reflecting shifts in energy demand and availability of renewable sources. Monitoring these patterns is crucial for households and businesses aiming to reduce their environmental impact by choosing the best times to use energy-intensive appliances.

Midnight to Noon: Low Carbon Intensity

From 00:00 to 12:00, carbon intensity remained consistently low, with actual CO₂ emissions ranging between 34 and 67 gCO₂/kWh. Early morning hours were particularly clean, with some intervals recording emissions as low as 34 gCO₂/kWh, outperforming forecasts. This period offered an ideal window for using high-energy devices such as washing machines, dishwashers, or EV chargers.

Afternoon to Early Evening: Moderate Increase

Carbon intensity began to rise during the early afternoon. From 14:00 to 16:00, emissions peaked at 178 gCO₂/kWh, maintaining moderate levels until around 18:00. This spike corresponds with increased energy demand, leading to greater reliance on non-renewable sources like coal and gas to meet consumption needs.

Evening to Midnight: Return to Low Intensity

After 21:30, carbon intensity began to decline steadily. By late evening, from 22:00 to midnight, emission levels dropped back into the ‘low’ category, reaching as little as 49 gCO₂/kWh. This reduction marked a more environmentally friendly period to schedule non-essential appliances.

Why Monitoring Carbon Intensity Matters

At Jaxi, we believe that increased awareness of real-time carbon intensity empowers users to make smarter energy decisions. When demand is high and renewable supply is low, fossil fuel generators must compensate, increasing CO₂ emissions. By aligning usage with greener periods, consumers can help lower the nation’s overall carbon footprint and support a shift toward more sustainable energy practices.

Stay informed with daily updates to make eco-conscious energy choices. Together, we can contribute to a cleaner, more sustainable future — one kilowatt-hour at a time.