About the project:The Alliant Energy Solar Demonstration Project was launched during the summer of 2015 as part of EPRI’s Integrated Grid Pilot Projects. Alliant Energy and EPRI will evaluate the impact of solar photovoltaic (PV), battery storage, and electric vehicle charging station technologies at Alliant Energy’s Madison, Wis., headquarters.

This multi-year initiative will allow Alliant Energy, its customers and project collaborators to learn about the many ways solar and renewables can be used in an upper midwestern setting. It will study a number of different types of technologies in a northern climate and will serve as a learning laboratory with a focus on research, safety, education and collaboration.

Alliant Energy’s customers are increasingly interested in renewable energy applications, and they are looking to the utility as a trusted advisor. Alliant Energy is committed to innovation and advancing renewables. With this project, the utility will have the opportunity to research and share the best renewable energy implementation strategies for the company and its customers. Alliant Energy will use this information as it considers future renewable energy investments. And, while the primary focus of this project is research, some of the power generated from the project – roughly 325 kilowatts (kW) of capacity for phase one of the project – will be used by Alliant Energy’s office building. None of the power will connect to the grid for use by others.

EPRI will collect the data, analyze it and present it in a format that is viewable for project collaborators and the public, via a web-based dashboard. Real-time data will be available online and in a format viewable on mobile devices.

ALLIANT ENERGY SOLAR DEMONSTRATION PROJECT

About EPRI:The Electric Power Research Institute, Inc. (EPRI, www.epri.com) conducts research and development relating to the generation, delivery and use of electricity for the benefit of the public. An independent, nonprofit organization, EPRI brings together its scientists and engineers as well as experts from academia and industry to help address challenges in electricity, including reliability, efficiency, affordability, health, safety and the environment. EPRI’s members represent approximately 90 percent of the electricity generated and delivered in the United States, and international participation extends to more than 30 countries. EPRI’s principal offices and laboratories are located in Palo Alto, Calif.; Charlotte, NC; Knoxville, Tenn.; and Lenox, Mass.

Electric Power Research Institute 3420 Hillview Avenue, Palo Alto, California 94304-1338 • PO Box 10412, Palo Alto, California 94303-0813 USA 800.313.3774 • 650.855.2121 • askepri@epri.com • www.epri.com © 2016 Electric Power Research Institute (EPRI), Inc. All rights reserved. Electric Power Research Institute, EPRI, and TOGETHER . . . SHAPING THE FUTURE OF ELECTRICITY are registered service marks of the Electric Power Research Institute, Inc.

January 2016

Project by the numbers:

• More than 1,300 solar panels, and 10 different panel types

• Five 2.0 kW and five 1.5 kW fixed-axis solar PV structures near the front entrance to the parking lot

• Thirteen electric vehicle chargers with five near the front entrance to the parking lot that are available to the public and employees, two under the solar canopies in the front parking lot for employees and visitors, four in the east parking lot for employees and two in the underground garage for employees and ADA-accessibility

• The 13 electric vehicle chargers will feed a total of 24 parking spaces, for employees, visitors and the public.

• Four-section solar canopy (114 kW total) near the front entrance to the building dedicated to both visitor and employee parking and one-section solar canopy (31kW total) on the far east parking lot for employees

• Four fixed-axis solar PV lift structures with a capacity of 3 kW each on the northwest part of the property

• Nine fixed-axis solar PV lift structures with a capacity of 4.5 kW each on the western part of the property

• Five solar PV units on the southwest part of the property (solar lab) that are dual-axis structures with a capacity of 3 kW each

• Two solar café tables on the back patio of the building

• One 30 kWh battery energy storage system inside the building

• Installation of rooftop solar with 9 combinations of manufacturers and technologies for a total capacity of 95 kW

• Phase two of the project may include a solar bus stop in partnership with Madison Metro, a Madison B-Cycle bike sharing facility, and additional ground-mounted solar features.

Project timeline:

Alliant Energy expects to have the site completely operational in early 2016.

For more information:

Visit alliantenergy.com/solar or www.integratedgrid.epri.com.

About Alliant Energy:Alliant Energy Corporation’s Wisconsin utility subsidiary, Wisconsin Power and Light Company (WPL), utilizes the trade name of Alliant Energy. The Wisconsin utility is based in Madison, Wis., and provides electric service to 465,000 customers and natural gas service to approximately 185,000 customers in central and southern Wisconsin. The employees of Alliant Energy focus on delivering the energy and exceptional service their customers and communities expect – safely, efficiently and responsibly. Visit alliantenergy.com or call 1-800-ALLIANT (800-255-4268) for more information. Alliant Energy Corporation is traded on the New York Stock Exchange under the symbol LNT.