As part of the new power purchase agreement, Tamar started selling power from its Basingstoke and Holbeach anaerobic digestion (AD) plants.
Another three facilities in Retford, Halstead and Hoddesdon are scheduled to come online in 2015 and will deliver power to EDF.
EDF Energy director of business services John Cockin said: "This PPA provides a flexible way to sell energy into the market, so Tamar Energy can achieve the best price for their power and benefit from the minimum income certainty provided by the Feed in Tariff.
"We’re delighted this innovative approach suits both parties and enables Tamar Energy to achieve financial close for its power stations."
Tamar Energy chief executive Willie Heller said: "Agreeing the PPA with EDF Energy, the UK’s largest producer of low-carbon electricity, is a landmark commercial achievement for Tamar Energy, which has quickly grown to be the UK’s largest AD company.
"Moreover, it’s important achievement for the UK’s AD sector, proving the value of AD’s base load generation in the market over the long term."
Tamar Energy is building a network of AD plants in various locations across the UK. The facilities will generate about 100MW of energy for over 200,000 homes in the region.
