Solar power in Wisconsin

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Solar powered road sign
Solar powered road sign
Average solar insolation

Solar power in Wisconsin on rooftops is estimated to be able to provide 40.1% of the electricity used in Wisconsin, using 23,600 MW of solar panels.[1] Net metering is available for systems up to at least 20 kW, and excess generation is credited at retail rate to customers next bill. Some utilities allow net metering up to 100 kW. For Xcel customers, kilowatt credits are rolled over monthly and are reconciled annually at avoided cost.[2] Best practices recommend no limits, either individually or aggregate, and perpetual roll over of kilowatt credits.[3]

A 2016 estimate indicates that a typical 5 kW solar array installed in Wisconsin will pay for itself in 13 years and go on to provide an additional profit of $18,860 during its 25-year life.[4] Wisconsin's renewable portfolio standard requires 10% renewable sources for electricity by 2015.[5]


In 2007, Wisconsin's largest solar array was the 44.4 kW array on the Urban Ecology Center in Milwaukee.[6]

In 2011, the largest array was the 360 kW parking lot array in Verona,[7] which is being expanded to 2.2 MW. A 3.177 MW array is planned for a distribution center in Oconomowoc.[citation needed]

In June 2016, the 2.3 MW Rock River solar project near Beloit became the largest solar farm in Wisconsin.[8]

The KI convention center located in Green Bay, WI currently has the largest solar PV installation in Northeastern Wisconsin. The new 115-kilowatt array comprises 480 PV solar panels.[9]

As of May 2014 there are about 2,250 homes powered by solar energy in Wisconsin.

Wisconsin ranks 24th in the nation for the number of solar jobs. Since 2012, Wisconsin has added 800 jobs in the solar industry.[10]

Water Treatment Facilities[edit]

In Superior, WI the cities wastewater treatment plant has installed four So-larBee units to provide adequate aeration without the use of the cities 75-hp units. After this installation the 75-hp blower units could be completely shut off during no-flow periods and in result the city of Superior saved $18,000 per month.[11][12]

See also[edit]


  1. ^ "Rooftop Solar Photovoltaic Technical Potential in the United States: A Detailed Assessment" (PDF). Retrieved 21 April 2018.
  2. ^ "Net Metering". Archived from the original on 18 April 2012. Retrieved 21 April 2018.
  3. ^ "Net Metering Model Rules" (PDF). Retrieved 21 April 2018.
  4. ^ "2018 Guide to Wisconsin Home Solar Incentives, Rebates, and Tax Credits". Retrieved 21 April 2018.
  5. ^ "DSIRE". Retrieved 21 April 2018.
  6. ^ "Largest Wisconsin Solar Array to be Dedicated February 10". Retrieved 21 April 2018.
  7. ^ Group, Unified Newspaper. "Verona Press". Unified Newspaper Group. Retrieved 21 April 2018.
  8. ^ Wisconsin's largest solar project delivering power to Alliant Energy customers, Alliant Energy Corporation, July 18, 2016
  9. ^
  10. ^ "Archived copy" (PDF). Archived from the original (PDF) on 2016-03-04. Retrieved 2015-04-16.CS1 maint: archived copy as title (link)
  11. ^
  12. ^ Green Grocer Update Archived 2012-08-06 at the Wayback Machine
  13. ^ Sherwood, Larry (August 2012). "U.S. Solar Market Trends 2011" (PDF). Interstate Renewable Energy Council (IREC). p. 17. Archived from the original (PDF) on 2012-09-06. Retrieved 2012-08-16.
  14. ^ Sherwood, Larry (June 2011). "U.S. Solar Market Trends 2010" (PDF). Interstate Renewable Energy Council (IREC). Retrieved 2011-06-29.
  15. ^ Sherwood, Larry (July 2010). "U.S. Solar Market Trends 2009" (PDF). Interstate Renewable Energy Council (IREC). Archived from the original (PDF) on 2010-09-25. Retrieved 2010-07-28.
  16. ^ Sherwood, Larry (July 2009). "U.S. Solar Market Trends 2008" (PDF). Interstate Renewable Energy Council (IREC). Archived from the original (PDF) on 2009-11-23. Retrieved 2010-07-24.
  17. ^ Sherwood, Larry (July 2014). "U.S. Solar Market Trends 2013" (PDF). Interstate Renewable Energy Council (IREC). Retrieved 2014-09-26.
  18. ^ "Wisconsin Solar". Retrieved 21 April 2018.
  19. ^ "PV Watts". NREL. Retrieved 24 July 2012.

External links[edit]