FRANKFURT, May 11 (Reuters) - German utility E.ON said on Wednesday it had sold 84% of the remaining 2022 output from its Isar 2 nuclear plant ahead of the reactor's closure at the end of the year.

Presentation slides for its first quarter 2022 financial results showed 2022 power generation volumes for Isar 2 in E.ON's non-core PreussenElektra unit were sold at 68 euros ($71.71) per megawatt hour (MWh) as of March 31, 2022.

Hedging rates of forward generation volumes are tracked by traders and analysts to assess what supply is tied up with counterparties and the value of production.

E.ON's production in 2021 from Isar 2, a 1,400 megawatt (MW) plant able to power the equivalent of a metropolis, had fetched 49 euros/MWh.

Over-the-counter prices for German round-the-clock power from all conventional energy sources to be delivered in 2023 closed at 216 euros/MWh on Tuesday, according to Refinitiv Eikon data.

Current prices are sky-high due to a combination of energy scarcity and gas supply worries in particular, that have spilled into related markets.

Germany's move to phase out nuclear power, which will also entail RWE's Emsland plant and EnBW's Neckarwestheim 2 shutting at year-end, has been called into question as it seeks to cut energy supplies from Russia after Russia's invasion of Ukraine.

Berlin has said that costs and risks of extending nuclear power outweigh limited benefits.

E.ON rival Uniper recently detailed some hydropower and nuclear price hedges in the region. ($1 = 0.9482 euros) (Reporting by Vera Eckert, editing by Rachel More and Christian Schmollinger)