$700 AUS… now that’s getting somewhere. It looks as though it uses the whole roof as a way of funnelling the wind. Looks simple enough to reverse engineer as well – really there’s no reason why these things should cost more than plastic rubbish bins….
… apart from the need for:
A battery bank
Regulators / Inverters
Wires, wires, wires.
I quite like the idea that someone had a while back… which was only an idea – for a wind system that you could just plug into any wall point – and it would supply power back to the rest of the house. I guess it’s not impossible with adequate levels of trickery at the junction-box end of things.
It’s so easy to get hung up on the mechanical bits… it’s actually retrofitting the existing system that costs.