How your electricity use can affect your carbon footprint

We usually focus on how much electricity we use — not when we use it. But timing actually makes a difference to your carbon footprint.

The environmental impact of electricity changes throughout the day. When demand is lower — often overnight or during parts of the day — a larger share can be covered by renewables like wind and solar.

In the early evening, things look different. That’s when most households are using electricity at the same time — cooking, heating, charging devices. Demand rises quite quickly, and to keep everything running, the grid often needs to bring on extra generation, typically from gas power stations.

Why this matters

• Your everyday actions — even small ones — can influence how much carbon is emitted
• When households shift usage away from peak times, it helps the grid run more efficiently and rely less on fossil fuels
• In some cases, this can also translate into lower system costs, which ultimately affects energy bills

Put simply: your timing doesn’t just affect your home — it adds up across the system.

What you can do

• Check when electricity is cleanest in your area using EnergyTrace — it shows real-time carbon intensity and forecasts, so you can see when emissions are expected to be lower
• Once you know that, try to run flexible activities — things that don’t need to happen at a specific time, like laundry, dishwashers, or EV charging — during periods when forecasted emissions are low
• As a simple rule of thumb, midday or overnight is often cleaner than the early evening peak

You don’t necessarily need to use less electricity to reduce your impact. Using it at a cleaner time can make a real difference.

You might also wonder how this fits with green tariffs. If your electricity is labelled “100% renewable”, does timing still matter? We’ll break that down next.