Solar panels get cheaper

Solar panels have got a lot cheaper in the past year. The price of an entire solar panel installation fell by a sixth, from 20,500 euros to 17,000 euros.

By 2015 the price should halve in comparison with today's figure.

People installing solar panels can get a rebate if the installation qualifies for a green energy certificate. For panels installed this year the rebate is worth 450 euros for every megawatt of energy produced. Starting next year the figure will fall to 350 euros to take account of the falling prices.

Householders who fail to insulate their roof properly won't qualify for a green certificate rebate either.