Free Flow Power Corporation and Energy Systems Group, LLC Explore Development of Hydrokinetic Generating Facilities on the Mississippi and Ohio Rivers

EVANSVILLE, IN and BOSTON, MA--(Marketwire - May 28, 2008) - Free Flow Power Corporation, a Massachusetts-based developer of hydrokinetic power generation facility and technology development company, and Energy Systems Group LLC, a nationally accredited and leading energy efficiency and performance contracting developer, announced today that they have entered into a Memorandum of Understanding to explore development of hydroelectric power generation facilities on the Mississippi and Ohio River systems.

Free Flow Power CEO Dan Irvin stated, "We are excited about the opportunity to work with Energy Systems Group on potential free flow sites in the Mississippi and Ohio Rivers. We believe this relationship will fully complement our strategy of working with established market participants to integrate hydrokinetics into existing power producer portfolios."

Energy Systems Group LLC President Jim Adams said, "We see significant potential in the development of free flow hydrokinetic power generation facilities as an integral component of our renewable energy development portfolio."

Free Flow Power has developed a turbine generator system designed to produce affordable electricity from moving water without dams or diversions. The company is pursuing the development of hydrokinetic generation at sites in the Mississippi, Missouri, Ohio, Niagara and Detroit Rivers.

Hydrokinetic or free flow hydro generation is the extraction of energy from moving water without requiring the construction of new dams or diversions. Hydrokinetic generation is possible from the flow of rivers, streams, conduits, currents, tides and waves.

Energy Systems Group (ESG) is an award-winning energy services company operating from 14 Branch Offices in the Midwest and Southeast. The core business of Performance Contracting uses energy efficiency, technology, and long term financing to help building owners modernize their facilities. Renewable Energy solutions and assets are adding a whole new dimension to growth. To learn more about Energy Systems Group, visit their website at www.energysystemsgroup.com. ESG is a wholly owned subsidiary of Vectren Corporation (NYSE: VVC).

Contact Information: Press Contacts: Daniel R. Irvin Free Flow Power Corporation Tel: 646 712 2155 www.free-flow-power.com Meram El Ramahi Energy Systems Group Tel: 812 492 3734 www.energysystemsgroup.com