CMS has advised on the completion and commissioning of the final stage of the Aratiden renewable energy project in Bulgaria, comprising a 130-megawatt-peak photovoltaic power plant and an 81-megawatt-hour battery energy storage system.
According to CMS, with the final phase completed in November 2025 and the battery facility entering operation on February 4, 2026, Aratiden has become the largest renewable ESG project in Bulgaria to date. The photovoltaic plant was developed and commissioned in stages, with the first two phases entering operation in 2024 and the final stage completed in late 2025. Construction of the battery energy storage facility was finalised in early 2026. The total investment in the Aratiden project amounts to approximately EUR 140 million.
In 2025, CMS advised Aratiden on a co-located battery storage project (as reported by CEE Legal Matters on May 20, 2025). In 2024, CMS advised Global Biomet on EUR 50 million financing and two EPCs for the Aratiden PV project in Bulgaria (as reported by CEE Legal Matters on April 4, 2024). That financing came following the successful licensing of the project by the Utility Regulator of Bulgaria, on which CMS assisted Global Biomet last year (as reported by CEE Legal Matters on June 9, 2023). Back in 2021, CMS successfully represented Global Biomet in proceedings against the Ministry of Finance of the Republic of Bulgaria in a dispute related to the country's feed-in tariff (as reported by CEE Legal Matters on August 19, 2021) and, in 2020, helped the company settle a multi-million euro renewable energy dispute with the Sustainable Energy Development Fund (as reported by CEE Legal Matters on April 23, 2020).
The CMS team included Managing Partner Kostadin Sirleshtov, Partner Borislava Piperkova, Counsel Vaska Solakova, Senior Associates Elena Yotova-Yordanova, Diyan Georgiev, and Viktoriya Dimitrova, Associates Petar Petrov and Stoyana Petrova, and Trainees Niya Ivanova and Boris Kirov.
