Carbon intensity update for 9th Sep 25

Stay informed with Jaxi’s daily carbon intensity update for 9th September 2025 and make smarter energy choices to reduce your carbon footprint. Electricity demand can fluctuate throughout the day, and when renewable sources like wind and solar can’t meet the demand, fossil fuels such as coal or gas are often used. This results in higher carbon intensity – the amount of CO₂ emitted per unit of electricity used (measured in gCO₂/kWh).

Tracking real-time carbon data helps households and businesses optimise their energy usage. Here’s how carbon intensity varied across the UK on 9th September:

🕛 Midnight to Early Morning (12:00 AM – 5:30 AM)

The day began with moderate carbon intensity, ranging from 159 to 187 gCO₂/kWh. While not the cleanest window, this period was relatively more sustainable than peak hours.

🌅 Early Morning Peak (5:30 AM – 6:30 AM)

During early morning usage spikes, carbon intensity reached high levels, peaking at 190 gCO₂/kWh. This is typically when more fossil-fuel-based power may be brought online to meet demand.

🌤️ Mid-Morning to Noon (7:00 AM – 12:30 PM)

This period saw a significant improvement as intensity dropped from 165 to just 99 gCO₂/kWh. By late morning, the UK entered a low carbon intensity phase, likely enhanced by increased solar generation.

🌞 Afternoon Hours (12:30 PM – 5:00 PM)

Carbon intensity returned to moderate levels, fluctuating between 110 and 161 gCO₂/kWh. These hours remained cleaner compared to the morning peak but weren’t as optimal as mid-morning periods.

🌇 Evening Period (5:00 PM – 9:00 PM)

As energy demand rose again during the evening, carbon intensity gently declined from 176 to 139 gCO₂/kWh, staying within the moderate range.

🌙 Late Night (9:00 PM – 11:00 PM)

The lowest carbon emissions of the day occurred at night when intensity dropped to just 63 gCO₂/kWh. This period marked the best time for using high-energy appliances like washing machines, dishwashers, or electric vehicle charging.

💡 Tip from Jaxi: Energy used during low carbon intensity windows—typically mid-morning and late night—comes from cleaner sources. Planning your high-energy tasks around these times can significantly reduce your environmental impact.

Stay tuned for daily updates and use Jaxi to monitor carbon intensity in your area. Together, we can make smarter energy choices that contribute to a cleaner, more sustainable future. 🌍⚡