Carbon intensity update for 27th Nov 25

UK Carbon Intensity Update for 27th November 2025

On 27th November 2025, the UK’s electricity grid performed well in terms of environmental impact. The carbon intensity — measured in grams of CO₂ emitted per kilowatt-hour (gCO₂/kWh) — remained at relatively low levels throughout most of the day, reflecting strong contributions from renewable energy sources.

Here’s a breakdown of carbon intensity trends throughout the day:

• 12:00 AM – 06:00 AM: The early hours began with encouragingly low carbon intensity levels, ranging between 64 and 84 gCO₂/kWh. This suggests a good mix of low-carbon energy generation overnight.
• 06:30 AM – 08:30 AM: As households and businesses started their day, electricity demand increased slightly. Carbon intensity rose moderately, peaking at 108 gCO₂/kWh by 06:30 AM, before gradually decreasing again.
• 08:30 AM – 07:00 PM: Daytime saw consistently low carbon intensity, averaging around 85 gCO₂/kWh. However, there was a brief moderate spike between 4:30 PM and 7:00 PM, when the intensity peaked again at about 105 gCO₂/kWh — likely due to the evening demand surge.
• 07:00 PM – 12:00 AM: Emissions declined again during the evening hours, stabilising at an average of 90 gCO₂/kWh. The return to low intensity indicates improved utilisation of cleaner energy sources later in the day.

Why does carbon intensity matter?

When electricity demand is high, fossil-fuel-powered generators — such as those burning coal or gas — may be called upon to meet the shortfall left by renewables like wind and solar. This raises carbon intensity, increasing the environmental impact of electricity usage during those periods.

By monitoring carbon intensity and adjusting appliance usage to align with low-intensity periods, individuals can reduce their personal carbon footprint. For example, running dishwashers, washing machines, or charging electric vehicles during off-peak, low-carbon times can significantly lower carbon emissions.

Stay Informed with Jaxi

At Jaxi, we are committed to helping households and businesses make greener energy choices. By keeping you informed of daily carbon intensity updates, we empower our users to plan energy usage smarter and more sustainably.

Let’s continue to support the transition towards clean energy by being mindful of when we use electricity. Every small action contributes to a bigger climate solution.

Check back daily for up-to-date carbon intensity reports across the UK.