How the league table works
WhichGreen exists to help you choose the best green supplier you can, so you have the best chance of actually making a difference with your electricity bill.
At WhichGreen, we believe the best way to measure who's green and who's not is to look at who's building new sources of renewable energy. After all, only by building new capacity can we hope to reduce carbon emissions and fight climate change.
Some energy companies are far bigger than others, so we thought the best way to measure a supplier's green credentials was to look at how much new build they were developing per customer.
That works out as a simple measure: how many pounds each supplier spent per customer per year building new sources of green energy. And that's how we built this league table.
New generation is based upon the date the renewable project was accredited by Ofgem.
Every year we collect the statistics and update the table. This is only the second year the WhichGreen table has been running, but there has been quite a few changes.
As ever, we'll leave you to draw your own conclusions.
WhichGreen 2005 League Table
| Rank | Supplier | £ / Customer |
|---|---|---|
| 1 | ecotricity | £117.19 |
| 2 | ScottishPower | £16.89 |
| 3 | npower | £14.31 |
| 4 | Scottish & Southern Energy | £3.81 |
| 5 | Centrica | £3.25 |
| 6 = | EDF Energy | £0.00 |
| 6 = | Good Energy | £0.00 |
| 6 = | Green Energy UK | £0.00 |
| 6 = | Powergen | £0.00 |
The £ / Customer is based on each supplier's total expenditure on building new renewable energy capacity in 2005 divided by the number of customers at the end of 2005. Expenditure was sourced from suppliers or calculated based upon the Ofgem commission date for each renewable generator with a capacity of over 50 kW in 2005 and multiplied by the average investment expenditure per MWh for that form of renewable generation (Source: Ofgem; BWEA; Enviros 2005).