Carbon intensity update for 15th Oct 25

On October 15, 2025, the UK experienced fluctuating carbon intensity levels in its electricity grid, reflecting the ongoing dependence on fossil fuels during peak electricity demand periods. At Jaxi, we are committed to helping you make informed decisions about your energy usage by providing real-time updates on carbon intensity. Understanding when the grid is cleanest can help you reduce your carbon footprint while saving on energy costs.

High Carbon Intensity Overnight and Early Morning

From 11:00 PM on October 14th to 10:00 AM on October 15th, carbon intensity levels were consistently high, ranging between 239 and 247 gCO₂/kWh. The early morning hours (4:30 AM to 10:00 AM) showed a spike in emissions, with levels reaching a forecasted peak of 265 gCO₂/kWh. This increase is typically due to higher electricity consumption as the nation starts its day, leading to greater reliance on non-renewable energy sources like coal and gas.

Slight Improvement Midday

Following the morning peak, carbon intensity saw a modest improvement starting around 10:30 AM. Despite remaining within high levels, the figures ranged between 236 and 246 gCO₂/kWh throughout the day. This indicates some contribution from renewable sources, but not enough to significantly reduce overall emissions.

Evening Demand Spike

From 5:30 PM to 8:00 PM, another surge in carbon intensity occurred, once again reaching very high levels. This coincides with typical evening demand as residential usage spikes, often requiring additional fossil-fuel-based generation to meet energy needs.

Late-Night Emissions Decrease

As energy demand tapers off late in the evening, carbon intensity trends downward. By 11:00 PM on October 15th, levels dropped to around 208 gCO₂/kWh, reflecting lower demand and an increased share from cleaner energy sources.

What You Can Do

By tracking the UK’s carbon intensity with Jaxi, you can make smarter energy choices. Here are some helpful tips:

• Shift appliance usage—run dishwashers, washing machines, or charge electric vehicles during times of lower carbon intensity.
• Use timers and smart plugs to automate energy use during cleaner hours.
• Opt for renewable energy tariffs where available to reduce reliance on fossil fuels.

Every small change in energy habits can contribute to a lower national carbon footprint. Check Jaxi’s daily updates to plan your power usage around cleaner, greener electricity and support the transition to a more sustainable energy future.