This issue has become extremely complex since the Government introduced an obligation on suppliers to supply a certain (rising) percentage of electricity from renewable sources. The National Consumer Council has written a clear report of the issues, and compared the various suppliers, explaining the complexities and what you need to look for when deciding on a green tariff.
You can download their report from the NCC website (see below for the link).
When buying green electricity it is important to decide what you want your company to be investing in: encouraging more consumers to play their part by buying electricity from renewables? Investing in new development of generation? Making renewables more accessible to people in other parts of the world? Where do you want your premium to go? The reality is that the Government requires generating companies to produce 'green' electricity anyway (an increasing percentage every year under the Renewables Obligation), but currently consumer demand for renewables is less than is actually being produced. So it is really important that as consumers we show the Government that we do want our electricity produced by renewable means... and that we are prepared to REDUCE our demand.









