PPC said the value of the deal corresponds to an enterprise value of 133 million euros ($141.72 million) and is subject to regulatory approvals.

"PPC Renewables gets a significant portfolio of renewable energy sources of more than 110 Megawatts, which helps increase its own portfolio and its differentiation through the addition of wind parks," a PPC official said, declining to be named.

Volterra's Chief Executive Panos Nikou called it a "win-win deal" as it implements part of Volterra's strategy.

Volterra will continue to develop renewable energy sources and energy storage projects, he said.

PPC, which is 34% state owned and Greece's biggest power utility, plans to invest about 5 billion euros by 2024 to ramp up renewables capacity to at least 7.2 gigawatt by that date and shift away from coal-fired power generation.

($1 = 0.9384 euros)

(Reporting by Angeliki Koutantou and George Georgiopoulos; editing by David Evans)