Evance (formerly Iskra Wind Turbines) has launched a new 5kW wind turbine with what it says is a significant advance in efficiency, reliability, durability, and corrosion resistance. It also comes with lower installation costs than previous models. The Iskra R9000 is intended for schools, farms, rural homes, and light commercial applications.
The turbine, an evolution of the Iskra AT5-1, has been in development over two years. Several features differentiate the unit from other small wind turbines. For example:
Blade technology refers to airborne erosion testing (blowing sand at 60 mph onto blades) to twice standards necessary for military use, and improvements in manufacturing ensure highest quality standards.
Noise reduction over the previous design is 40%. Advanced generator design nearly eliminates operating noise while maintaining 96% efficiency. The turbine emits about 45 dBA at 60 m. (BWEA Reference Sound Level at 8m/s and 60m distance.)
Efficiency builds on the AT5-1 which was the most efficient in its class, says the company. The Evance R9000 improves on the former’s figure by 4%, increasing its energy yield to over 9,000 kWh on a site with AMWS of 5m/s. This is more energy than any other 5-kW turbine on the market.
A five-year warranty is based on the two and half million operating hours with 99% uptime. All parts are designed to IEC61400-2 and manufactured in composite, stainless steel, or coated to automotive standards. All installations are backed by a manufacturer trained and certified service network. Certification is by The Microgeneration Scheme in the U.K.
Reactive pitch ensures that the unit’s airfoils are perfectly positioned to the wind at all times. With no cut-out wind speed, the R9000 generates power from 5.6 mph.
Braking is by a patented design without moving parts, says the company. It stops the turbine at any wind speed and has no connection from the top of the tower to the ground or any other systems. A watchdog function on the brake provides a failsafe backup. The table includes a few more specs.
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