Alliant Energy, Iowa’s second-largest power company, has abandoned its position of refusing to buy excess power from rooftop power-generating systems on schools, government buildings, businesses and homes, reports DesMoinesRegister.com. That meant customers would not be credited on their bills for excess energy they generate during peak sun times and return to the grid. The reversal came days after Joshua Mandelbaum, an attorney with the Environmental Law and Policy Center in Des Moines, told the Iowa Utilities Board that Alliant’s position violated the state’s net metering rule and was thwarting renewable energy projects proposed by nonprofits and government agencies.