Yes, you really can get free solar panels and you can also get wind turbines as well.
There are two leading companies at the moment that use the same model:
A shade Greener offer solar PV -A Shade Greener
SolarVentus offer free electricity from wind turbines - SolarVentus Wind Turbines
I have provided consultancy for one of the companies listed above. Both these companies are genuine and real, once you understand how it works then it all makes sense. In April of 2010 the new feed in tariffs came into effect. You can read how they work in this guide to the feed in tariff
Basically, the companies get paid for every kW generated, how that energy is used doesnt matter. So the companies get a return on their investment, you get free electricity and everyone on the planet benefits from reduced CO2.
Note that to qualify for the feed in tariffs the equipment must be MCS certified and the installer must also be MCS certified. Installations also have to be registered with ofgem to get the FITS. If anyone has any questions regarding either of the companies or the feed in tariffs please feel free to ask as I do have some experience in this area.