Joining the wave will keep the lights on!

{sorce link http://www.timesonline.co.uk/tol/news/environment/article5167812.ece}

Fossil fuels and nuclear power are efficient forms of supplying electricity and are used worldwide as energy sources. These forms of fuel are toxic to the environment and often can go into the billions in clean up costs, if say a chemical spill or nuclear accident occurs. A man by the name of Alvin Smith has created a device called a Searaser that uses tidal energy from the ocean to provide a safer more cost effective energy alternate. One of these devices can power up to 1720 homes producing energy up to 30% cheaper compared to nuclear energy. The fact alone that the green house gas would be eliminated makes it all sound like a wonderful idea.

The question is what potential problems could a device like this face when it has to challenge mother nature?