Tidal power addresses one of the main weaknesses in renewable energy: uncertainty of supply. Wind and solar depend on weather conditions, while tidal movement can be forecast years in advance. That makes tidal power a useful addition to a low-carbon energy system that needs both clean generation and greater reliability.
Tidal power will not replace wind or solar, but it can strengthen the overall energy mix by providing predictable output. This matters as electricity grids become more dependent on renewable sources. A technology that generates according to a known tidal cycle gives grid operators better visibility and gives investors exposure to a renewable asset class with a different risk profile.
Tidal range projects use the difference in water levels between high and low tide. Water is held behind a barrage or lagoon wall and then passed through turbines to generate electricity. These projects can be large, expensive and difficult to approve, but they can also have very long operating lives. Existing tidal range schemes in France and South Korea are expected to operate for well over a century, which is important when assessing long-term infrastructure value.
Tidal stream projects work differently. They use underwater turbines placed in strong tidal currents. This approach avoids some of the larger physical barriers needed for tidal range schemes and can reduce certain environmental impacts.
The UK has a strong position in this sector because of its tidal resource. Areas such as the west coast, the Severn, the Mersey, Orkney and Anglesey show why the UK remains an important market for tidal development.
Ampeak Energy Limited (LON:AMP) a developer, owner and operator of sustainable energy projects. Transitioning to become a major Independent Power Producer (IPP) with a project development arm specialising in Battery Storage and Tidal Stream generation.
