Onshore Construction Start

On 14 August 2024, TenneT held the formal groundbreaking ceremony (Spatenstich) for the BorWin6 onshore converter station at Büttel in Schleswig-Holstein, Germany, marking the official start of onshore construction works for the land-side of the 980 MW 320 kV HVDC grid connection. The ceremony was hosted on the grounds of the existing Umspannwerk Büttel, where three HVDC converters are already in operation and the BorWin6 converter will be built as the fourth adjacent converter, together with the EPC consortium of McDermott International (lead contractor), GEIRI, and C-EPRI Electric Power Engineering, and attended by regional political and industry representatives. The ceremony is the canonical starting signal for the Landkonverter build; substantive civil works (excavation, piling, foundations) are understood to have ramped up in the weeks following, with the onshore converter targeted for readiness in 2027 ahead of the project's planned commercial operation in October 2027. Onshore cable trenching along the 45 km Büsum–Büttel route is a separate workstream being delivered by Friedrich Vorwerk Group / Bohlen & Doyen for Nexans, continuing into 2026.