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Our electricity fuel mix

We supply 100% renewable electricity to all our members. Every year, we report on our energy sources to Ofgem, the industry regulator. Here's our electricity fuel mix based on Ofgem supplier submissions for 2020-21.

Bulb's electricity is purely renewable, compared to the UK's average electricity fuel mix which is generated with a combination of 40% renewable, 39% natural gas, 17% nuclear, 4% coal and 2% other.

Notes: 'Coal' and 'Other' take up more space than they should on this chart because we've used a readable font size to share the figures.
Source: Electricity info, an independent energy information site.

Our renewable electricity

We supply all our members with wind, solar and hydro power. The breakdown looks like this:

88% wind, 11% solar and 1% hydro

Notes: That 1% looks bigger than it should on this chart because we've used a readable font size to share the figures.
Source: Bulb data.

Read our electricity sourcing policy

Our gas fuel mix

We work with green generators who use a variety of feedstocks to produce their renewable gas. Between April 2020 and March 2021, 3% of our gas came from renewable sources. 79% of that was generated from purpose-grown crops, 18% from food or farm waste and 4% from residues like vegetable peelings and cereal straw.

For each unit of green gas we buy, we receive a Renewable Gas Guarantee of Origin (RGGO) certificate from either the Renewable Energy Association or the Biomethane Certificates from Green Gas Trading.

The other 97% of our gas comes from the wholesale market. We choose to offset the emissions from this gas by funding projects that cut emissions in the atmosphere by the same amount. Read more about how we carbon offset gas on our energy page.