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Suppliers’ Fuel Mix Disclosure

All suppliers are required to provide information about the mix of fuels used to generate the electricity supplied to their customers as well as its environmental impact. Known as the Fuel Mix Disclosure, suppliers must publish this information annually and notify their customers via their bills, statements or promotional material. The chart has information about the suppliers’ fuel mix for all of its electricity tariffs, not just its green tariffs. The individual company pages (available tariffs) provide more detail about the fuel mix for each of the green tariffs.

Energy Suppliers' Fuel Mix Disclosure from 1 April 2006 to 31 March 2007
Supplier Coal Gas Nuclear Renewable Other CO2* Nuclear Waste*

Bizz Energy 1

25%

34%

27%

11%

3%

0.348

0.003

British Energy 1

11.7%

0.2%

85.2%

2.9%

0.0%

0.105

0.009
British Gas (Centrica)

18.0%

56.0%

20.0%

4.0%

2.0%

0.382

0.0022
EBICo 2

30.6%

57.8%

0.8%

10.2%

0.6%

0.489

0.00009
Ecotricity
23.8%

22.8%

25.9%

24.1%

3.3%

0.316

0.0029
EDF Energy

47.0%

29.0%

17.0%

5.0%

2.0%

0.54

0.0018
Good Energy

0%

0%

0%

100%

0%

0.0

0.0
Npower (RWE Npower)

44.0%

37.0%

13.0%

3.0%

3.0%

0.543

0.0015
Opus Energy3

7%

82%

8%

1%

1%

0.375

0.00088
E.ON Energy (E.ON UK) 4

42.%

36.7%

14.2%

3.6%

3.5%

0.53

0.002
Scottish and Southern Energy

30.6%

57.8%

0.8%

10.2%

0.6%

0.489

0.00009
ScottishPower

55.2%

36.7%

1.0%

6.8%

0.3%

0.63

0.0001
Utilita

N/A

N/A

N/A

N/A

N/A

N/A

N/A
UK Average

35.8%

38.8%

18.6%

4.7%

2.1%

0.474

0.0021

N/A Not available
*Units used: carbon dioxide (kilograms per kWh) and nuclear waste (grams per kWh).
1 As the energywatch green tariff guide covers tariffs for domestic customers and Bizz Energy and British Energy only supply electricity to non-domestic or business customers, details of their tariffs are not included in the guide.
2 EBICo operates under Scottish and Southern Energy’s supply licence.
3 Green Energy UK operates under Opus Energy’s supply licence. The information in the table is Opus Energy’s fuel mix information. Please see Green Energy UK’s tariff page for details of the fuel mix for its Green Energy +10 and Green Energy 100 tariffs.
4 Information in the chart is the fuel mix for E.ON UK. The fuel mix for the E.ON Energy brand (domestic customers) was 50.2% coal, 39.9% gas, 6.3% nuclear, 0.2% renewable and 3.4% other. The CO2 emissions were 0.614 g/kWh and the nuclear waste was 0.001 g/kWh.

Want to Know More?

Go to the links below for more information from suppliers about their green tariffs, investment in new renewable electricity generation and other environmental activities.

British Gas
EBICo
Ecotricity
EDF Energy
Good Energy
Green Energy
Npower
E.ON Energy
Scottish and Southern Energy
Scottish Power
Utilita

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