Positive
Project advancing - milestone achieved
Medium Impact
Significant progress or notable issue
On 30 October 2025, Baltic Power completed installation of both offshore substation topsides, OSS West and OSS East, in Polish Baltic waters. The substations, located about 20 km from shore at the level of Choczewo, are four‑storey steel structures that collect electricity from 76 × 15 MW turbines via inter‑array cables, step up the voltage to 230 kV and export power to the onshore substation in Choczewo through four offshore export cables. The topsides were fabricated at shipyards in Gdańsk and Gdynia by Grupa Przemysłowa Baltic, then transported to Denmark for full outfitting, reaching a weight of around 2,500 tonnes each. A consortium of CS Wind Offshore and Semco Maritime acted as main contractor. During the installation campaign, the substations were lifted onto pre‑installed foundations and connected via large transition pieces using a specialised floating crane supported by tugboats, barges and crew transfer vessels.