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Actually Mollie, all center lighting poles are protected by a concrete seperator on our highways. Also the center poles are bigger and stronger than your average lampost in your own street. The units themselves are made out of carbon fiber, what makes it very light weigt.
The units will weight about 25kg per set.

The windturbine concept itself is not new (exists since 1889), but what is new, is how you can use them on a large scale without disrupting the landscape much more as it already is and how to use the existing power lines and implementation of a single power transformer in a serie, cutting down the product and installation costs by 70%.

This is a 2.5Kw unit, and 5Kw per set, and should if made in a large order of 1000 cost about 1200€ each.
A large windturbine, generates 600 kW (with a theoretical max : 24×600 = 14400 kWh), the windleeches have a theoretical max : 24x5 = 120 kWh)

One unit will not power a lot of houses, but a 1000 would do the trick. 1000 units would be able to power 14.000/16.000 homes. For that you would need units on every center pole on 84 km of highway (Antwerp/Ghent, Ghent/Brussels, Antwerp/Brussles)