Ameren Corp. and its utility companies in Illinois and Missouri launched a major solar-energy initiative that will span both states.

“At these sites, we will be able to evaluate the effectiveness and efficiencies of specific types of solar systems in this region,” said Thomas R. Voss, Ameren CEO and president. “After the systems become operational, we will begin offering a range of online information about our findings from the project—information that should help customers in their own evaluations of different types of solar systems.”

This project will be developed in stages, beginning with solar installations either on the roof and/or grounds of two Ameren campuses.

The generating capacities for Ameren’s solar installations will range between 25 and 550 kilowatts. Project designs should be completed by mid-April, with the first-phase installation projects completed by the fall of 2010.