Renewable electricity

How electricity gets to your door

Electricity is generated in a variety of ways such as burning coal or using gas and wind turbines. It’s fed directly into the National Grid, and then through the transmission and distribution network to your home.

It isn’t possible to trace the electricity generated from a particular renewable source right through to each individual customer - it all gets mixed up in the grid. However, for some tariffs, suppliers will own or purchase certificates, such as Renewable Energy Guarantees of Origin (REGO) or Guarantees of Origin (GoO) certificates to show that the amount electricity used by customers on their tariffs has been sourced from renewable sources and fed into the National Grid.

Some tariffs offer additional benefits to the environment on top of any legal obligations the energy supplier may have, this is called 'Additionality'. It could be matched renewable electricity or donations to an environmental organisation.

British Gas Evolve electricity tariffs match 100% of the electricity you purchase with renewable electricity. This means that for all the electricity you use, the same amount is fed into the National Grid from renewable sources. We evidence this by buying Guarantees of Origin (GoO) certificates or Renewable Energy Guarantee of Origin (REGO) certificates or both.

Our fuel mix information

This chart shows the mix of fuels used by British Gas to generate our electricity, as well as its impact on the environment. British Gas Evolve uses Green Electricity tariffs – see the table below.

British Gas Evolve fuel mix 1st April 2019 to 31st March 2020

Fuel mix of our products

The table shows the British Gas fuel mix from 1st April 2019 to 31st March 2020.

Energy source

British Gas green electricity tariffs

All other British Gas products

British Gas trading Ltd

UK Average



Natural Gas0%0%0%39%
Other fuels0%0%0%2%
CO2 emissions0 g/kWh0 g/kWh0 g/kWh205 g/kWh
High-level radioactive waste0 g/kWh0.0021 g/kWh0.0017 g/kWh0.0012 g/kWh