Bilateral contracts with power stations that are remunerated on the basis of availability and efficiency.

Sales contracts with liberalised customers (B2B, B2C) with transfer prices based on the reduced volatility of medium-term market prices, benefiting from intra-group hedging.

Fuel - centralised purchases of coal, fuel oil, gas and respective transport.

CO2 - centralised management of licences.

Electricity markets - real-time management of electricity supply and purchase on the wholesale market (pool) and of auxiliary services.

Financial markets - participation in these markets as a way of hedging against "seasonably unfavourable" positions.