Poland saw negative power prices for three days in August for seven consecutive hours, which limited support for renewable power produces, Polish energy regulator URE said.

• A certificate of origin – typically used as a method of support for developers – is not granted for RES electricity when weighted day-ahead market prices are below 0 PLN/MWh for at least six consecutive hours.
• Weighted day-ahead prices in Poland on 10 August, 11 August and 25 August met that criterion, with weighted prices reaching as low as PLN-223.71/MWh for hour 14-15 on 10 August.
• As a result, energy producers must correct their certificate of origin applications via power system operators submitted to URE.
• This trend of negative prices is likely to continue in Poland as the country continues to expand its wind and solar capacity in the coming decades.