Carbon Tracker


3.8 million tonnes of CO2
saved of 6.6 million goal

291 days to go

Our carbon target

We're on a mission to lower bills and cut carbon emissions. We've set a goal to save 6.6 million tonnes of CO2 by the end of 2019.

How we calculate our carbon impact

Energy is all a bit abstract. It can be hard to understand the impact you have by being with a renewable supplier. To measure this impact, we compare the carbon emissions you have with Bulb to the carbon emissions you'd have if you were with a non-renewable energy supplier.

To make this comparison, we need to know how much energy an average Bulb home uses in a year. In 2018, this was 4,270 kWh of electricity and 12,669 kWh of gas.

With Bulb, your annual CO2 emissions are Zero

Because Bulb provides 100% renewable electricity and 100% carbon neutral gas, an average home with us emits 0.00 kg of CO2 per kWh of electricity and 0.00 kg of CO2 per kWh of gas. Over the whole year, this adds up to Zero kg of CO2.

With a non-renewable supplier, the average home would emit 3.5 tonnes of CO2 per year

This government report states that UK homes on the average fuel mix emit 0.283 kg of CO2 per kWh of electricity and 0.184kg per kWh of gas. Therefore, over the course of a year, a home using non-renewable energy would emit 1.2 tonnes of CO2 from its electricity usage and 2.3 tonnes of CO2 from its gas usage.

Collectively, the Bulb Community is saving 3.8 million tonnes of CO2 from entering the atmosphere every year

There are 1,074,997 homes in the Bulb community and because they're using renewable energy, they're saving an average of 3.5 tonnes of CO2 per home. Across all the Bulb homes, this adds up to a saving of 3.8 million tonnes of CO2 each year. Not bad eh? To put that into context, that's as much carbon saved as taking 2.6 million cars off the road. Which is like removing every car registered in Scotland!