Offshore Wind’s Winning Edge: Blowing When It Matters Most

Offshore wind is stepping up with a bold promise—not just to deliver clean energy, but to do it when it’s needed most. According to Charles Rattray, CEO of offshore wind developer Southerly Ten, offshore wind’s key strength lies in its perfect timing. While the costs may be higher than other renewables, its ability to generate power during extreme demand—like hot summer afternoons or freezing winter evenings—gives it an edge over traditional sources.

Southerly Ten’s 2.2GW Star of the South project is shaping up to be a game-changer. Positioned to replace retiring coal plants like Yallourn, it could take on a major share of Victoria’s energy load. New data shared by the company shows that Star of the South could match the output of Victoria’s brown coal generators, with significantly higher output during peak demand periods.

Backed by Bureau of Meteorology (BOM) data, Southerly Ten points out that Bass Strait winds are strongest when they’re needed most—hot afternoons and early evenings. Over 30 years of weather patterns reveal that these winds are not only consistent but peak during high-pressure systems, making offshore wind a reliable option for peak-time generation.

Between 3pm and 7pm—when energy demand peaks—offshore wind shows much higher capacity factors than its onshore counterpart or solar. Star of the South’s data suggests 70% capacity factors during these hours, compared to 20–40% for onshore wind. That reliability, Southerly Ten says, helps stabilize the grid and keeps prices in check.

What makes offshore wind even more effective is its geographical distinction. Located away from the bulk of Victoria’s existing renewable assets, it adds diversity to the grid. This reduces system risk and strengthens energy security. Monitors near the project site show that the offshore wind system continues to perform well, even during the hottest evenings—as seen in December 2019 and January 2020.

It’s not just summer—offshore wind also shows great potential during winter. In Gippsland, the proposed location for multiple offshore wind projects, data shows a strong match between offshore wind patterns and times when gas generators typically operate. Southerly Ten says that if 2GW of offshore wind had been running in Victoria over the past decade, it could have replaced over 70% of the gas used during peak times.

By providing renewable energy during critical demand windows, offshore wind can reduce the reliance on gas and coal, help stabilize energy prices, and accelerate the transition to a more resilient grid. It’s not just about blowing harder—it’s about blowing at the right time.

As Australia embraces smarter energy solutions, EServices4U is here to support your transition. From energy procurement and audits to consultations on solar, wind, and energy-saving strategies, we help businesses and individuals reduce costs and embrace a sustainable future. Visit www.eservices4u.com.au to see how we can power your journey toward clean energy.