Renewable energy is a topic where a lot of nonsense has been spouted by both sides. The greens keep giving us worst case scenario situations you could make a Hollywood blockbuster about and the the 'evil nasty capitalists' say it's not worth the effort.
Lots of the arguments focus on climate change, but that is not to say the argument for using renewable energy collapses if it is ignored. Renewable energy sources have two other major advantages.
Or the fact you don't need to buy them. Oil (and hence gas) prices are rising, and the planet has finite reserves. Renewable sources such as wave, wind and solar energy do not require the purchase of such things. This tends to reduce running costs, and hence consumers' bills.
We need not worry is another country stops selling us coal/gas. We would be self-sufficient in terms of energy production. This would mean that the cost of energy would be more stable.
So in the long term consumers could save money if the government invests heavily in renewable energy (oh, and we may just save the planet too).