Wholesale electricity market prices rose by nearly 20 percent in the first five months of the year, official market data provided by power grid operator IPTO has shown.

These wholesale price increases directly impact retail price levels for consumers who have opted for floating-tariff supply agreements linked to wholesale price-related clauses.

The overall cost of electricity in the wholesale market rose 19.1 percent between January and May, from 64.111 euros per MWh to 76.373 euros per MWh.

Electricity prices in the day-ahead and intraday markets rose by 14.1 percent between January and May, from 55.612 euros per MWh to 63.499 euros per MWh, the data showed.

Discrepancy cost nearly doubled during this period, rising from 0.836 euros per MWh to 1.643 euros per MWh.

Power utility PPC, which, until now, has incorporated CO2-price clauses into its electricity bills, has announced it will adopt wholesale price-related clauses in August.