Carbon intensity update for 20th Sep 25

Carbon Intensity Update for the UK – 20th September 2025

At Jaxi, we are committed to helping you understand and act on carbon intensity trends. By staying informed, you can make better choices about when to use energy-intensive appliances — reducing both your carbon footprint and supporting a more sustainable energy future.

The carbon intensity of electricity refers to the amount of CO₂ emissions produced per kilowatt-hour (gCO2/kWh) of electricity consumed. Lower values indicate greener, more sustainable energy generation, often from renewables like wind and solar. Here’s a breakdown of the UK’s carbon intensity levels for 20th September 2025:

Early Morning (23:00 – 05:30)

The day began with moderate carbon intensity. Values fluctuated between 145gCO2/kWh and 136gCO2/kWh. While not at their lowest, these levels were still environmentally friendlier than peak times later in the morning.

Morning Peak (06:00 – 08:00)

Between 06:00 and 07:30, demand increased sharply. As a result, carbon intensity rose to a daily high of 172gCO2/kWh. When electricity demand is high, fossil fuel generators may be used more frequently, increasing emissions.

Midday Consistency (09:00 – 15:30)

Carbon intensity values stabilised during the late morning and early afternoon, ranging between 134gCO2/kWh and 116gCO2/kWh. This midday window offered a more balanced opportunity for energy usage without contributing significantly to emissions.

Evening Decline (18:00 – 22:30)

Good news came with the evening hours. From 18:00 onwards, carbon intensity values dropped steadily, reaching a low of just 76gCO2/kWh between 20:00 and 22:30. This marked the greenest period of the day, ideal for powering devices and running larger appliances.

Key Takeaway

Shifting your energy usage to periods of low carbon intensity helps reduce demand on non-renewable sources like coal and gas. Planning when to charge your electric vehicle, run washing machines, or use heating systems can directly support a cleaner grid.

At Jaxi, we believe that informed choices lead to impactful change. By adapting your usage based on real-time carbon intensity updates, you contribute to a lower-carbon, more sustainable future for everyone.

Check back daily for more updates and make your energy use smarter and greener with Jaxi.