A major uk mast manufacturer has quoted a rough estimate of more than half the retail price for a Proven mast. Paying £20,000+ for a 5kw turbine can mean up to 20 years payback time. I am 61 and could be dead or in a nursing home before I get a return........its not a good deal which ever way you look at it. Its all very well considering the benefits to the environment, but to afford it first is a major hurdle to overcome. The actual generators used by UK manufacturers in their turbines may even be made in those countries whose products we can easily describe as cheap and unreliable. Proven and Iskra.........I wonder which manufacturer makes their generators?