EDF Energy has two green tariffs, of which Green Tariff is a Green Energy Supply certified tariff:

Climate Balance is designed to help reduce the impact of your home’s annual carbon emissions. It costs on average £45 per a year more than their standard tariff, based on a typical household using 20,500 kWh of gas and 3,300 kWh of electricity.

Through its partner The Carbon Neutral Company, EDF Energy uses this money to purchase carbon credits in energy efficiency and carbon balancing projects around the world.

Green Tariff is a green source and green fund tariff.  EDF Energy matches 100% of the electricity you use with a supply of renewable power back into the electricity grid.  All of the electricity comes from sources that qualify under the Renewables Obligation. It costs on average an extra £13 a year, with EDF Energy matching this amount, with the total paid into their Green Fund. The fund invests in the development of renewable generation for communities and schools. You also receive a free home energy survey, information on energy efficiency and grants as well as two energy saving light bulbs.

Since 2001, the EDF Energy Green Fund has made awards of over £4.25 million to 245 community based renewable energy projects. EDF Energy cover all the administration costs for the fund.

EDF Energy also offers a separate Read, Reduce, Reward scheme where you submit meter readings every quarter. In return you get 250 Nectar points per fuel for each valid quarterly meter reading submitted online. You also get access to an online Energy Tracker to monitor your energy use. If you use less energy from one year to the next, you receive 1,000 bonus Nectar points per fuel.