Carbon intensity update for 20th Oct 25

UK Carbon Intensity Update – October 20, 2025

Understanding carbon intensity is essential for managing energy use responsibly. At Jaxi, we help you plan appliance usage at times when electricity generation is cleaner. Carbon intensity measures the amount of CO₂ emitted per kilowatt hour (gCO₂/kWh) of electricity used. By making informed choices based on this data, you can reduce your carbon footprint and contribute to a more sustainable future.

Low Carbon Intensity in the Early Hours (00:00 – 05:00)
During the early morning, the UK experienced low carbon intensity levels. Emissions ranged between 70 and 101 gCO₂/kWh, indicating high availability of renewable energy sources. This makes early hours an ideal time to run energy-intensive appliances like dishwashers or washing machines.

Moderate Levels Through Morning and Afternoon (05:00 – 16:00)
As the day progressed, carbon intensity began to rise slightly, reaching moderate levels. The highest reading during this period occurred between 15:00 and 15:30, peaking at 172 gCO₂/kWh. This increase suggests that some fossil fuels may have been used to meet growing energy demand.

High Carbon Intensity in the Evening (16:00 – 20:00)
A significant spike in carbon emissions was recorded in the late afternoon and evening. Peak levels hit 196 gCO₂/kWh, reflecting a heavy reliance on non-renewable energy sources due to surging demand. Avoiding high-energy tasks during these hours can minimize environmental impact.

Decline in Carbon Intensity at Night (20:00 – 23:00)
The carbon intensity levels gradually decreased after 20:00. By 22:30, emissions fell to a more moderate level, reaching 127 gCO₂/kWh by 23:00. This later evening period is another good opportunity to schedule appliance use with reduced environmental cost.

Why Timing Your Electricity Use Matters
High electricity demand often forces the grid to rely on coal or gas-fired generators, which significantly increase CO₂ emissions. When demand is low, renewable sources like wind and solar are more likely to cover electricity needs, resulting in lower carbon output. Monitoring real-time carbon intensity helps you choose optimal times for energy-intensive activities, supporting both your wallet and the planet.

Stay tuned to our daily updates at Jaxi so you can make smarter, eco-friendly decisions about when to use electricity. Together, we can reduce emissions and move towards a cleaner, greener future.