Sonnedix acquires 260 MW battery storage portfolio in Italy

Sonnedix said it has acquired a 260 MW BESS portfolio in Tuscania, Italy, from developer Sphera Energy. The deal increases Sonnedix’s total BESS portfolio to approximately 2.8 GW, according to the company.

The portfolio includes two adjacent standalone BESS projects, one rated 160 MW and the other 100 MW, both with four-hour duration, said Sonnedix. It said the acquisition builds on its existing Italian footprint, which passed 1 GW of operating capacity following a March 2026 acquisition of six PV plants in Lazio backed by long-term power purchase agreements.

“We took our first step into battery storage in other Italian regions last year. Now we’re building on that with real scale in Tuscania,” said Axel Thiemann, chief executive of Sonnedix. “Batteries let us do more with the power we’re already generating, storing it and deploying it when it’s needed most.”

Giuseppe Marona, managing director for Italy at Sonnedix, said the company has “gone from building a solar base to building a genuinely flexible energy business here in under two years.” He added that the Tuscania deal “won’t be the last” addition to its BESS portfolio.

Sonnedix has also turned to project financing to fund its Italian pipeline, securing a €260 million ($297.4 million) green loan in 2023. It later said co-located BESS would play a “big, big role” in its growth strategy following a larger European refinancing effort.

Sphera Energy, launched in 2023, has separately secured authorization for two 100 MW BESS projects in Tuscany as part of a broader wave of Italian battery storage approvals in 2026, and is an Italian project developer focused on utility-scale battery storage.

Sonnedix operates in nine countries, including Chile, France, Germany, Italy, Japan, Poland, Portugal, Spain and the United Kingdom, with a total portfolio of 11 GW spanning solar, wind and storage assets.