Carbon intensity update for 27th Sep 25

Carbon intensity levels across the UK varied significantly on 27th September 2025, with notable opportunities for eco-conscious energy use. Understanding these fluctuations can help households and businesses plan appliance usage to reduce carbon footprints and support a greener grid.

Electricity demand in the UK is met by a mix of energy sources, including renewables like wind and solar, as well as fossil fuels such as coal and gas. When electricity demand peaks or renewable generation dips, fossil fuel generators often step in—raising carbon intensity during those periods. Monitoring carbon intensity allows consumers to shift their energy use to cleaner times of the day.

Here’s a breakdown of how the day unfolded:

• 00:00 – 02:00: The early hours began with a moderate carbon intensity, averaging around 108 gCO₂/kWh.
• 12:00 – 14:00: Midday brought the cleanest energy window, with intensity dropping to a low of just 84 gCO₂/kWh at 13:00 — the most environmentally friendly half-hour of the day.
• 15:00 – 17:00: As demand picked up in the afternoon, intensity climbed again, reaching a peak of 157 gCO₂/kWh at 17:00 due to increased reliance on fossil fuel generation.
• 23:00: The day closed with a stable but moderate level of 136 gCO₂/kWh.

Overall, the day followed a “moderate” carbon intensity trend, but those who planned ahead and used appliances such as washing machines, dishwashers, and electric vehicle chargers during low-intensity windows — particularly around midday — contributed to lower overall emissions.

At Jaxi, we aim to empower our users with real-time updates and daily forecasts so they can make greener choices every day. Simple actions like shifting energy use to cleaner times can collectively make a significant impact in reducing national carbon output.

Why It Matters:

• When renewable sources are not sufficient to meet demand, fossil fuels fill the gap, increasing carbon emissions.
• By using electricity when carbon intensity is low, you help support a more sustainable and efficient energy grid.
• Jaxi provides carbon intensity insights to help households and businesses align their energy use with cleaner periods of the day.

Stay tuned for more daily updates and smart energy tips. Together, we can make each kilowatt count toward a cleaner planet.