Dutch‑Norwegian offshore floating solar pioneer, SolarDuck and MARIN have completed testing of a 54-platform offshore floating solar array, marking the third campaign in their programme. The effort followed earlier evaluations of a single triangular platform and a six-platform HEX-1 layout conducted over the past two years. The latest HEX-3 configuration was built as a 1:20 model using carbon tubes and lightweight connectors to reproduce full-scale mechanical behaviour. The campaign examined multi-body dynamics, assessing coupling forces, mooring loads and the effects of wind, currents and waves. Early findings showed that wind had a damping effect, reducing motion across single and interconnected platforms. The tests indicated technical feasibility for larger offshore deployments and strengthened confidence in offshore applicability. Decay tests on single platforms were also completed to refine options for remote-site use, reflecting continued collaboration between SolarDuck and MARIN.