Interesting video.
S1500 is also mentioned (with S500 and S1000) on:
About S500, S1000 and S1500 (recent update):
Note that in two photos, you can see a few people who give some ideas of the possible scale. Each wind turbine seems to be no more than 4.5 m in diameter (and not 6 m as I had supposed), leading to a swept area of 16 m². To reach 100 kW per turbine, even with an additional 20% efficiency of the duct, as announced in the article, it would require winds close to 30 m/s.
In the other hand, the total weight of a ton with these small wind turbines looks plausible, contrary to what I indicated, but in any case, a ton does not represent a tenth of the weight of a 1 MW wind turbine, but rather a hundredth. And with a wind speed of 12 m/s (already a good speed even at 1500 meters high) the total power of S1500 could be about 100 kW, by taking account of the addition of 20% of the duct.
I only have bits of information, the details of which are essential to determine the true capabilities. A complete description with precise measurements under specific wind conditions would be useful.