In 2004, several electricity producers did not have long-term power purchase agreements. Policies and measures to facilitate the conclusion of contracts for the purchase and sale of electricity Contract for the sale of electricity from renewable sources: a contract whereby a natural or legal person undertakes to purchase electricity from renewable sources directly from an electricity producer The company purchases electricity mainly from a group of power plants (i.e. related generators) on the basis of power purchase agreements (followed by purchase agreements). Poland shall terminate the long-term agreements referred to in Article 1 for the sale of electricity. on State aid granted by Hungary under long-term power purchase agreements C 41/05. . .