What is the expected lifespan of tidal energy systems with proper maintenance?

• A. Designed to last for many decades with proper maintenance
• B. 5–10 years
• C. 2–3 years
• D. 1 year

Answer: (A)

Durable, long-term operation is the expectation for tidal energy systems when they are properly maintained. These devices are built to withstand harsh marine conditions, using corrosion-resistant materials, robust housings, and protection for electrical and mechanical components. Regular maintenance—inspecting and refurbishing seals, bearings, gearboxes, and moorings; replacing worn parts; and upgrading electrical systems—extends their life far beyond a few years. With such practices, tidal systems are typically designed to operate for multiple decades, often on the order of 20–30 years or more, with some components or sections refurbished or replaced over time to keep the overall installation running.

Shorter lifespans like 5–10 years, 2–3 years, or 1 year would imply frequent, comprehensive overhauls or failures that aren’t aligned with how these systems are engineered and maintained in practice.