SAO PAULO, May 7 (Reuters) - The governments of Brazil and Paraguay have reached a fresh deal regarding tariffs of their jointly-owned Itaipu hydroelectric power plant, Brazil's Mines and Energy ministry said on Tuesday.

Under the new agreement, starting in 2026 Brazil will no longer pay extra costs related to the plant to Paraguay, only its operational costs, the ministry said.

Paraguay, meanwhile, will be allowed to directly sell excess power from the plant to Brazil and compete in the Brazilian market with local generators, which currently charge lower prices. (Reporting by Leticia Fucuchima; editing by Gabriel Araujo)