I had 6 of them over a 5 year period all running as HAWTS.
The first one was the complete turbine kit that they sell with their version of a furling tail or to be accurate it was a non furling tail and burnt out in less than a week. To be fair they did replace it with out any arguments.
The other 5 where mounted on yaw tubes with furling tails that i re sized and adapted from Hughes 8ft plans. These machines worked quite well for what they are. But it was a constant job nursing them, failures where many and often. Some examples follow
The bearings are Chinese in origin and made from play dough /putty
The casing is aluminium and corrodes badly inside and out.
There are no seals or gaskets to stop the ingress of water that causes the wound iron core to rust to the point that it swells and seizes in the rotor.
The output wires pass through the centre spindle these corrode through very quickly and puts the turbine into runaway mode with no way to stop it (not funny)
The whole pmg and blades hang on a single m16 nut that eventually shakes loose allowing the turbine to tilt down causing a blade strike on the tower or allowing the turbine to literally fall off the tower.
The end plates are held on with “stainless steel†cap screws that rust!
Most of the problems are quality related and are easily fixed if done from new. Its a few years since I had these so maybe they have changed the design! they used to claim these where designed and built in the UK! mine all had quality control stickers on and in them printed in Chinese.
I am in a very wet and windy corner in the UK so maybe it was just to extreme for them and not a fair test.
If you do buy one fit new bearings, real bearings like SKF etc, paint it inside and out replace the 3 output wires and seal the shaft with silicone and set it to furl at 500w. They claim 1kw and it will give you 1kw and more but not for very long. Keep an eye on the forecast and shut it down before a gale hits it.
As I said things may have changed, above is just the experience I had with them, I eventually worked out that it is much easier, cheaper and more fun to build axial flux machines. AFs have break downs as well but if you built it you can fix it. I have never had an AF machine run away or explode into a thousand bits, I have had a couple of burn ups but its easy to wind a new stator.
Sorry if its not what you wanted to hear!
If I can help further just let me know.
Russell