100-kilowatt solar installation powers university's parking garage --- Excess solar energy stored in an industrial-size battery system --- Project enabled by $1 million grant from Duke Energy Florida

ST. PETERSBURG, Fla., May 20, 2015 -- Duke Energy Florida and the University of South Florida St. Petersburg (USFSP) today unveiled a new solar battery project that will explore how to store and use energy from the sun. A $1 million grant from Duke Energy is funding the research at USFSP.

As part of the grant, a 100-kilowatt (kW) solar photovoltaic (PV) system has already been installed on the top of the university's 5th Avenue South parking garage.

"This partnership gives Duke Energy and the University of South Florida additional firsthand experience in solar battery storage systems," said Alex Glenn, state president, Duke Energy Florida. "The innovative and cutting-edge research also provides students a real-world learning environment as we develop alternative energy solutions for our customers."

Solar energy that is not used by the garage for lights, elevators and electric-vehicle charging stations is stored in battery systems or put onto the electric grid for immediate use. High-resolution data is being collected on the PV installation and on the energy storage system which is displayed on an online dashboard and several kiosks on campus.

The new larger energy storage system operates in conjunction with two smaller existing USF energy storage systems. This creates an opportunity to build upon existing battery technology while advancing clean energy solutions.

"This is an opportunity to manage energy costs, while promoting sustainability on campus," said USFSP Regional Chancellor Sophia Wisniewska. "We are pleased and proud to have been awarded this grant, and to provide faculty and students with a chance to help build something of lasting impact. USFSP has long enjoyed a strong partnership with Duke Energy and we look forward to future collaborations."

The 100-kW solar array at USF St. Petersburg measures approximately 7,100 square feet, with 318 individual panels. It is a freestanding canopy with space beneath for parking. A solar array of this size can produce enough energy to power an electric car for half a million miles.

USFSP has an existing 2.0-kW solar energy system located at its Central Facilities Plant that was constructed in partnership with Duke Energy and the USF Tampa School of Engineering. Additionally, a series of solar panels provides power for decorative lights on campus.

For a time-lapse video of the USFSP solar project: https://youtu.be/lFsp5OaCX44

For photos of the solar installation and battery storage project: https://www.flickr.com/photos/dukeenergy/sets/72157652697031808

Leader in battery storage technology

Duke Energy has several battery storage projects underway across the country.

* Duke Energy Florida's SEEDS (Sustainable Electrical Energy Delivery Systems) program, which includes two battery storage projects at the University of South Florida at St. Petersburg and the Albert Whitted Park, also in St. Petersburg. The two units combine energy storage systems with small solar arrays.

* Twenty-four K-12 schools in the Duke Energy Florida service territory have received 25-kilowatt-hour battery backup systems funded by the company that are integrated with their solar PV installations. As with other battery storage projects at Duke Energy, there is performance monitoring of these systems to learn more about combining intermittent energy resources with storage. The installations also help foster educational opportunities for students at the schools.

* The company's Notrees Battery Storage Project in West Texas is North American's largest battery storage installation project at a wind farm. Duke Energy matched a $22 million grant from the U.S. Department of Energy to install 36-megawatt (MW) large-scale batteries capable of storing electricity produced by its 153-MW Notrees wind farm.

USF St. Petersburg

The University of South Florida St. Petersburg (USFSP) is a separately accredited, research-active institution within the USF System. USFSP offers 23 undergraduate and 12 graduate programs in three colleges: Arts and Sciences, Business and Education. USFSP is recognized for its significant commitment to community involvement and civic engagement by the Carnegie Foundation for the Advancement of Teaching. For more information, visit usfsp.edu.

Duke Energy Florida

Duke Energy Florida owns coal-fired and natural gas generation providing about 9,000 megawatts of owned electric capacity to approximately 1.7 million customers in a 13,000-square-mile service area.

With its Florida regional headquarters located in St. Petersburg, Fla., Duke Energy is the largest electric power holding company in the United States with approximately $121 billion in total assets. Its regulated utility operations serve approximately 7.3 million electric customers located in six states in the Southeast and Midwest. Its commercial power and international energy business segments own and operate diverse power generation assets in North America and Latin America, including a growing portfolio of renewable energy assets in the United States.

Headquartered in Charlotte, N.C., Duke Energy is a Fortune 250 company traded on the New York Stock Exchange under the symbol DUK. More information about the company is available at duke-energy.com.