BNZ starts building two 108 MWh batteries at the Rinaldone and Camposcala solar parks in Lazio

Independent power producer BNZ has announced the start of construction of two battery energy storage systems (BESS) at the Rinaldone and Camposcala photovoltaic parks in the province of Viterbo, in the Lazio region, according to a statement published on 6 November by the Italian portal QualEnergia. The batteries are being added to solar plants the company already operates.

The figures. Each system will have a power of 27 MW and a capacity of 108 MWh, giving a discharge duration of four hours; together the two exceed 216 MWh. The Rinaldone park has 45 MWp and Camposcala 53 MWp. Works at Rinaldone have been entrusted to Grupotec and those at Camposcala to Elecnor, with the aim of bringing both installations into operation by the end of the year. BNZ estimates that each installation will avoid 10,000–15,000 tonnes of CO₂ emissions per year.

Their role. According to the company, the batteries will store energy during peak solar production and feed it into the grid at times of high demand, reducing curtailment and helping to balance the local grid. "Integrating BESS technology into our plants is a pillar of our multi-technology strategy," said BNZ chief executive Luis Selva.

Context. The two parks are among the three solar plants, totalling 135 MWp, that BNZ inaugurated in March 2025 near Viterbo and Montalto di Castro, according to the statement published at the time by Tuscia Times. In July 2026, ESS News reported that BNZ had chosen Sungrow as battery system supplier for the same two parks, under a framework agreement between Sungrow and Nuveen Infrastructure, BNZ's owner.

What comes next. In Italy, BNZ plans to install 350 MW of storage across eight projects in areas with high solar irradiation. At European level, the company's portfolio exceeds 2.7 GW, of which 850 MW are battery systems, mainly in Spain, Portugal and Italy.

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