Carbon intensity update for 8th Sep 25

Wondering when the best time is to power your appliances for a cleaner tomorrow? At Jaxi, we’re committed to helping you reduce your environmental impact by keeping you informed about the UK’s daily carbon intensity levels. Here’s your detailed update for September 8, 2025, to help you plan smarter and greener energy use throughout the day.

Late Night to Early Morning: Low Carbon Intensity

Between 11:00 PM and 4:00 AM, electricity in the UK is generated with significantly lower carbon emissions. Carbon intensity ranges between 66 gCO₂/kWh and 105 gCO₂/kWh, making this an ideal time to run high-energy appliances like dishwashers or washing machines.

Morning to Midday: Moderate to Low Intensity

• 4:00 AM – 9:00 AM: Carbon intensity rises to a moderate level, peaking around 145 gCO₂/kWh. As people begin their day, demand increases, and more fossil-fuel-based generation may kick in.
• 9:00 AM – 12:30 PM: Emissions decrease again, returning to low levels around 74 gCO₂/kWh. This mid-morning window is another excellent opportunity for greener energy usage.

Afternoon: Fluctuating Carbon Intensity

• 12:30 PM – 3:00 PM: The intensity remains low overall but experiences occasional spikes up to 107 gCO₂/kWh. Stay mindful if running multiple appliances during this window.
• 3:00 PM – 5:30 PM: Carbon intensity begins to climb, moving into the moderate range and reaching up to 169 gCO₂/kWh.

Evening Peak: High Carbon Intensity

The most carbon-intensive period occurs from 5:30 PM to 8:00 PM, with a peak of 191 gCO₂/kWh. During this time, renewable energy sources are often insufficient to meet demand, and fossil fuels like coal and gas are used to fill the gap. If possible, reduce energy consumption during these hours to support a cleaner grid.

Late Evening: Declining Intensity

From 8:00 PM to 11:00 PM, carbon intensity starts to decline again, settling back into the moderate range at around 161 gCO₂/kWh. This drop signals reduced demand and increased availability of cleaner energy sources.

Why It Matters: When energy demand is too high, generators often have to rely on non-renewable sources such as coal and gas, increasing carbon emissions. By aligning your energy use with periods of lower carbon intensity, you can significantly reduce your personal carbon footprint and contribute to a more sustainable UK grid.

Stay updated with Jaxi for real-time carbon intensity reports and energy-saving tips. Together, we can create a more efficient and eco-friendly future.