Hi festive, its been no hassel at all!! they havent cost me anything either, its part of a government scheme available to homeowners (FIT scheme) I receive pretty much all my electric free through the day and just use my supplier when its dark, the company who own the panels get paid via any stored electric which is sold to the national grid, and the grid pays them for using panels to produce electric rather than the power stations having to produce it!
sorry if i havent explained it properly. Im watching them as i type fit them to our friends house across the street hehe!! x