The Kansas WAC FAQ

60-ft Skystream, Sterling HS

Frequently asked questions about renewable energy. Please note: we are not dealers, we get no compensation from dealers or manufacturers, and we are not really equipped to evaluate dealers and manufacturers. This site is meant to make it easier for us to answer your questions, but it doesn't mean we necessarily endorse all the companies and individuals we may direct you to. While we do our best to keep up to date, dealers and manufacturers change continually. Check the "last updated" date (bottom of page) to determine how useful our price estimates are. We welcome feedback on this site, whether broken links or recommendations of new links.

Who in Kansas sells Wind Turbines?
  • Southwest Wind Power maintains a searchable database of Skystream dealers (and other renewables): click on "where to buy"
  • Bergey WindPower is probably the oldest small-turbine manufacturer and is based in Oklahoma
  • Endurance is a family of small (5kW) to mid-sized (30kW) turbines being marketed by BTI Energy in Greensburg.
  • Entegrity 50-kW turbines are sized for schools and businesses
  • Northern Power has just started marketing its 100-kW Northwind100 turbine, for schools, businesses and town governments.
  • Kansas manufacturers include Enertech (Newton) and West Wind Energy (Otis); visit their websites for information on which turbines they may have available.
  • The US DOE Wind Technologies website has a FAQ and many more resource links
  • Windustry and the American Wind Energy Association are also good sources for more information.
  • What about vertical-axis turbines?
    UrbanGreen Energy's 4-kW VAWT Vertical-axis wind turbines (VAWTs) somewhat resemble egg-beaters (Urban Green Energy's 4-kW machine is shown to the right.)  There are many different models out, all with the same idea: since the airfoils are vertical, the turbine should spin no matter which direction the wind is blowing from, and it should tolerate turbulence better than a horizontal-axis machine.  Usually VAWTs are marketed for urban environments, such as on roofs--presumably lower-cost because no tower is used.  Problems include vibration in the roof (can be designed to minimize) and the fact that, while on the upwind side of a roof the wind is stronger, on the downwind side the wind is nearly null, and wind doesn't blow from the same direction all the time.  The short answer is, no VAWT has yet been shown equal to a HAWT in the same conditions.  However, experimentation continues.  One website to check out options is EcoBusiness Links' VAWT site.
    What about solar power?
  • Solar insolation map and other assistance: on the Kansas Energy Office website, shows approximately how much solar energy is available annually.
  • FindSolar.com has a solar system cost estimator and dealer list.
  • US DOE's Solar Energy Technologies Program has lots of free information and links.
  • NREL's IMBY tool lets you "draw" a solar array on a Google Earth image of your site, and tells you the price and kW production of the resulting array.

  • Kansas Solar House 2007
    What is the average cost of a home-scale renewable energy system?
  • Solar photovoltaic (electric): $8-$10 per installed watt (no batteries)
  • Solar thermal (hot water):
  • Wind turbine (electric): $15,000 and up, largely dependent upon choice of tower.
  • What is the expected lifetime of a renewable energy system?
  • Most solar and wind installations have 20-yr manufacturer warranties.
  • Most solar PV installations will last upwards of 30 years.
  • What about bad weather?
  • Wind turbines are designed to shut down in high winds (over 50-60 mph)
  • Wind turbines are designed to survive winds upwards of 120 mph
  • Solar PV arrays are designed to withstand hail up to golf-ball size
  • Wind turbines usually shut down if iced, and are no more hazardous than light poles
  • Won't the generator back-feed into the grid if the power goes out?
  • All residential-scale renewable power generators are designed to shut down if they cannot detect a grid signal.  This prevents electricity from flowing back onto lines a working lineman would expect to be "dead": not energized.
  • Systems must have appropriate switches in place to disconnect the home from the grid during a grid outage, if the homeowner wants the generator to continue to operate.  Consult with your manufacturer/installer and a licensed electrician.  **Warning**: if you do this wrong people may die; please don't mess with electricity without proper precautions, and don't break National Electric Code--it's there for a reason!
  • What kinds of incentives are available for installing renewable-energy generation?
  • In KS in 2008, the only state incentive is a waiver of property taxes.
  • A Federal tax credit of 30% of total project cost is available for homeowners installing renewable energy systems.
  • Watch this space: the Kansas State Energy Office hopes to make grants of 25% of project cost available for public entities (schools, cities, counties etc.) starting in Fall 2009.
  • What will the utility pay me for excess energy?
  • KS passed a "net-metering" bill in 2009, requiring investor-owned utilities (Westar, KCPL and Empire) to purchase excess energy from consumer generators at retail rate (the same rate they sell it to you.) Electric cooperative utilities are only required to pay 150% of avoided cost (cost of fuel) to "co-generators". That means in the range of 4-6 cents/kWh, depending on the utility and its price of fuel.
  • Westar Energy makes its "avoided cost" or "fuel cost" per month public here.
  • Some Kansas cooperative utilities are starting to net-meter for small homeowner systems (<10kW).  Check with your local utility.