Skip to content

Our electricity fuel mix

As you may know, 100% of our electricity comes from renewable sources, and every year we need to let the regulator know where this comes from. For every unit of electricity we purchase, we buy a Renewable Energy Guarantee of Origin (REGO) certificate to match. These certificates allow Ofgem to verify the source of every supplier's electricity.

100% of Bulb's electricity is renewable, compared to 38% national average

Bulb's electricity is purely renewable, compared to the UK's average electricity fuel mix which is generated with a combination of 33% renewable, 41% natural gas, 19% nuclear, 5% coal and 2% other.

Note: Based on Ofgem supplier submissions for 2019-20
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:

73% wind, 24% solar and 3% hydro

We source this energy from renewable generators across the country. In 2020, we bought around 4.5% of our electricity directly from renewable generators, and the remainder on the wholesale market, matched by Renewable Energy Guarantee of Origin certificates (REGOs).

100% carbon neutral gas

Our gas is 100% carbon neutral. We offset the emissions from the gas we supply by supporting carbon reduction projects around the world. We're one of the biggest buyers of green gas for homes in the UK. So a chunk of our gas mix comes from renewable sources, too.

Every carbon offset certificate we buy is verified by one of three internationally-recognised standards: the Gold Standard, the Verified Carbon Standard or the UNFCCC's Clean Development Mechanism. These organisations ensure carbon reduction projects have a robust audit trail, and that carbon savings are additional to what would happen anyway and are sustained over time.

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.

Our green gas fuel mix

We're one of the biggest buyers of green gas for homes in the UK. We provide 100% carbon neutral gas to all our members. For April 2020-March 2021, 3% was green gas produced from renewable sources like food or farm waste.

We work with generators who use a variety of feedstocks to produce their renewable gas. For April 2019 - March 2020, the latest data available, the breakdown was:

  • Purpose grown crops: 93%
  • Food or farm waste: 4%
  • Residues (e.g. vegetable peelings, cereal straw): 3%

We like to think this gas is as natural as your uncle's after a plate of sprouts. And it's produced pretty much in the same way!