This offshore transformer substation is the beating heart of the wind farm. It collects and stabilizes the produced wind energy, transforms the energy to 220 kV high voltage and conducts the electricity to the main land. The offshore transformer substation consists of a large steel building with 4 deck levels, weights 1,100 Tonnes and is designed to endure the extreme weather conditions in the North Sea. The installation of the offshore transformer substation is expected to be completed in Spring 2018. As from mid-2018, the Rentel wind farm will produce green energy for 300,000 households.