Evance R9000 Vs Proven WT6000

“The Evance R9000 is the latest variant of the long established 5kW small wind turbine from the UK manufacturer Iskra, recently re-branded as Evance.

The R9000 is the first turbine to be equipped with Reactive Pitch technology, a unique control concept developed and patented by Evance. Reactive Pitch guarantees that the blades will capture exactly the right amount of energy according to the wind speed and generator loading conditions.

At low to moderate wind speeds the Reactive Pitch mechanism captures the maximum energy possible from the wind by holding the blades with absolute precision at the maximum efficiency position.

At higher wind speeds, when the energy in the wind exceeds the maximum capacity of the generator, the R9000’s unique Reactive Pitch mechanism automatically pitches the blades. This regulates energy capture, rotor speed, and the loads experienced by the turbine structure. It will therefore capture the full 5kW power, and the reduction in stresses mean that the R9000 offers greater safety and survivability

The R9000 also has a patented high-efficiency generator which converts up to 96% of the energy captured from the wind into useful electricity. The generator is specifically designed for the R9000, and is integrated into the turbine’s rotor.

What all that means is that the Evance R9000 can capture more energy across the range of wind speeds, especially the lower and moderate speeds that are normally experienced on the majority of the mainland UK.
The combination of the advanced pitch control, which is much more effective than the Proven’s “coning” mechanism, and the more efficient generator enable the Evance R9000 to out perform the Proven WT6000 at lower to moderate wind speeds…”

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