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The UrWind 02

Your breath of fresh air

F.A.Q

Where should I install it?

A wind turbine's best location is one where wind moves at high wind speeds and uniformly in the same direction without turbulence. Turbulence is caused when obstacles such as buildings and trees block the wind turbine from benefitting from the prevailing wind direction. Therefore, its best location is upwind of obstructions or far and high enough downwind in order to avoid turbulence. If you want to evaluate your site, please contact us and we will be able to provide you with a free preliminary wind evaluation.

What are the safety features?

UrWind uses a braking system which will stop the wind turbine at high wind speeds and during any unusual situation. The system also has an emergency brake that can be manually engaged.  It has been designed to operate safely in the harshest environments, being able to withstand wind speeds of 120 mph. The UrWind O2 is manufactured using both IEC standards and AWEA standards for safety and duration.

Does UrWind O2 have accreditation?

The UrWind O2 uses a UL 1741 certified inverter. This certification allows the system to be easily interconnected to the utility and to be eligible for many state rebate programs. UrWind is currently working towards obtaining the SWCC (Small Wind Certification Council certification) for its UrWind O2 and is the first company with a vertical axis wind turbine to be listed as having an “Application Pending” with the SWCC.

How much power does it produce?

The UrWind O2  produces between 2000-4000 kilowatt hours per year depending on the average wind speeds at your location. To give you an idea, the electricity produced by the system will power around 20% to 40% of an average U.S. home*.

*Based on an average U.S household consumption of 10000 kilowatt hours a year.

What is the wind resource needed to install the UrWind O2?

UrWind requires a minimum average wind speed of 10.1 mph (4.5 m/s). Good locations have an average wind speeds of 11.205 mph (5 m/s) or greater. UrWind offers a free preliminary wind evaluation. Please contact us.

How high should the UrWind O2 be installed?

At higher heights the UrWind O2 will generate more electricity as it will be able to access stronger wind speeds and better wind quality. Generally speaking, a tower which places the rotor 30 ft above surrounding obstacles will be sufficiently high.

Considering that the tower is a substantial part of the investment, a cost-benefit analysis should be done in order to find the right height in order to maximize electricity production without increasing the overall cost. Zoning regulations should also be considered when determining tower heights.

When installing a wind turbine on a rooftop, you will be taking advantage of the height of the building. Nevertheless, the wind turbine should still be placed on a tower in order to avoid any turbulence that might be caused by the roof. UrWind recommends a 15 ft tower for roof-top installations.

Can I install the UrWind O2 on my roof?

Yes! The UrWind Ocan be installed on roof tops. In the cases where there is no land available in the urban setting, a roof top installation is a viable option.

Certain conditions must be met in order to do a rooftop installation. The building structure must be sufficiently rigid to sustain the loads of a small wind turbine. Generally a concrete or steel building structure will be strong enough to withstand the installation of the UrWind O2. A civil engineer will need to evaluate the building structure before proceeding with a rooftop installation.

The UrWind O2 should be installed on the leading edge of a building facing prevailing winds.  It should also be installed on a 15ft tower in order to avoid any turbulence created by the roof.

Will the UrWind O2 generate vibrations?

Wind turbines generate vibrations. Nonetheless, there are several techniques and wind turbine designs that can be used to reduce this effect. The UrWind O2 has integrated vibration dampers that considerably reduce the vibrations issues.

Can I interconnect the UrWind O2 to the utility grid?

Yes. The excess electricity produced by the system can always be bought by the utility as there is a U.S. Federal law, under the Public Utility Regulatory Policies Act or PURPA, which requires utilities to purchase power from independent providers. The purchase rates vary greatly between utility providers, thus each provider should be contacted for further details.

The connection to the grid will be subject to the local government's and utility provider's electrical codes and technical requirements. Their main concern is the safety of the facility. They will emphasize proper wiring, proper installation, and the use of an inverter that has been certified by the Underwriters Laboratories (UL1741). The UrWind O2 holds these requirements and will be easily interconnected to the utility in the U.S and Canada.

Please contact your utility provider for details.

What are the economic advantages?

The UrWind O2 is competitive with conventional energy sources when we consider the lifetime of reduced utility costs and the fact that you will be protected against rising electricity prices.  The length of the payback period (or the time it takes to "break even") depends on the wind resource at the site, the installation process, the utility’s electricity rates, and the financing and incentives available. The current U.S federal incentives greatly improve the payback period, as it essentially reduces the total cost of the system by 30%. If there are strong average wind speeds and attractive state rebate programs the cost per kWh will be as low as 12 ¢. 

How will it help me contribute to the environment?

The UrWind O2 uses a free, available and renewable resource. By using this wind energy system you will be offsetting pollution that would have been generated by the utility, which generally uses fossil fuels as its main electricity source.

Is it reliable?

The UrWind O2 has been designed with aeronautics methods that ensure its safe operation and efficient production. UrWind manufactures in North America implementing high quality controls that contribute to delivering a superior product. The UrWind O2 is currently working towards obtaining the recently released SWCC certification. 

What is the maintenance process?

At UrWind we believe that maintaining a product can help your return on investment. It is especially interesting since it only requires an annual visual and acoustic inspection. After 5 years a UrWind partner should inspects the system, checks bolts, paint and overall system functionality. Since all UrWind O2 turbine towers are equipped with a hinge mechanism, this process should only take between 2 and 4 hours depending on the state of the turbine. Finally after the 20 year lifetime the local partner will evaluate what needs to be done to restore the turbine for yet another few years of production.

Would I need a building permit?

In order to install a wind energy system, a building permit might be required. In some instances the regulations will allow the wind system and the permitting process will be simple and quick. In other instances the regulations will limit height, location, and other characteristics. UrWind and our local partners will be able to coordinate the permitting procedure and provide you with all the required information and documentation.

How does the U.S 30% federal tax credit work?

Since 2009 under The American Recovery and Reinvestment Act, taxpayers can now claim a 30% tax credit for the purchase and installation of qualifying small wind electric systems with rated capacities of 100 kilowatts or less.  This credit has no caps and is available until December 31, 2016

For businesses the act allows customers to receive a financial grant from the treasury department in lieu of the tax credit.  In order to obtain this grant, the construction of the system must have begun in 2009 or 2010 and be placed in service before the programs termination date of January 1, 2013. 

For more information visit www.dsire.org or consult your tax advisor.

What is the start-up speed and the maximum wind speed the UrWind O2 can withstand?

The system will start generating power at 8.7 mph (cut in wind speed). If the winds reach considerable high speeds it will automatically stop spinning until normal wind conditions are restored. It will be able to withstand wind speeds up to 120 mph.

What should I expect in terms of noise?

The UrWind O2 operates truly quietly. Its sound is comparable to the sound levels of a household.  When background noise, such as the sound of the wind or the sound of cars is taken into account, the sound emitted by the UrWind O2 is negligible.