Tidal power - Advantages

• Reliability. Tidal power/energy is more predictable than solar or wind energies. Rise and fall of tides is more cyclic than random weather patterns.

• Truly renewable. Tidal energy will not run out very soon (something like 2 billion years, when all of the oceans will boil, because our planet's orbit will get too close to the sun). Tidal energy is free, non-polluting, no waste is produced.

• Economical. Startup costs to build a tidal energy plant is high, but the maintenance costs are very low. This means that you will not see profits for a few years, causing some investors to back out of the project. This can be seen as both an advantage and disadvantage, depending upon desired profit returns.

• Security. Barrages or small dams in general, can protect nearby cities or ship ports from dangerous tides during a storm, or at least reduce the damage done.

• Efficiency. Tidal turbines are up to 80% efficient in converting tidal energy to usable electricity. This is much higher than solar or wind energy generators. Compare this to your car engine, which is about 30% efficient at converting fuel in your tank to actual energy applied to the road.

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