While solar and wind dominate the renewable energy conversation, emerging technologies such as geothermal, ocean energy, and green hydrogen are creating new possibilities for a sustainable future. As demand for clean energy rises, these alternatives are gaining attention, particularly in regions where traditional renewables may not be optimal.
Geothermal energy utilises the Earth’s natural heat to provide a reliable energy source, unaffected by weather conditions or time of day. Countries such as Iceland and New Zealand have been leaders in this technology, demonstrating its environmental benefits and reliability. Unlike large solar or wind farms, geothermal plants require minimal land and, with advancements like Enhanced Geothermal Systems (EGS), can now be established in more locations worldwide. Ormat Technologies, a key player in geothermal energy, exemplifies the potential of this sector, offering stable, renewable power through its global projects and leading the way in energy storage.
Ocean energy, harnessed through tidal and wave systems, is another dependable renewable source, particularly suitable for coastal regions with consistent water movements. Tidal cycles provide a predictable and steady energy output, unlike more variable sources such as solar and wind. Though installing and maintaining ocean energy infrastructure presents challenges, the potential benefits are significant. SAE Renewables, previously known as Atlantis Resources, is at the forefront of tidal power development with its MeyGen project in Scotland, one of the largest of its kind. This project highlights the promise of ocean energy in delivering consistent, clean power while using offshore space efficiently.
Green hydrogen, created by using renewable energy to split water molecules, is gaining traction for its versatility. This fuel can be applied across transport, industry, and energy storage without producing carbon emissions, only water vapour. Countries around the world are investing heavily in hydrogen infrastructure, drawn by its potential to meet high-temperature industrial needs and replace fossil fuels. Plug Power, a leader in green hydrogen and fuel cell technology, serves industries like transportation and manufacturing, with major clients including Amazon and Walmart. This company’s growth reflects the expanding role of green hydrogen in sustainable energy.
While these alternative energies bring various challenges—such as high initial costs and infrastructure requirements—global interest from governments and investors is driving innovation and making these technologies more accessible. The integration of geothermal, ocean energy, and green hydrogen into the energy grid is helping to build a more reliable, adaptable system that reduces dependence on any single source.
For ESG-conscious investors, these emerging technologies present a chance to support a cleaner, balanced, and resilient energy system. Solar and wind remain essential, but with geothermal, ocean, and hydrogen energy in the mix, the future of renewable energy is both diversified and robust.
SAE Renewables Limited (LON:SAE) was founded in 2005 as a supplier of tidal stream turbines, SAE quickly grew to include development of tidal stream projects and is the majority owner of MeyGen, the world’s largest tidal stream energy project.
