The Public Utilities Commission of Ohio authorized American Electric Power subsidiary Columbus Southern Power to offer experimental "time-of-day" pricing to some of its small commercial and residential customers as part of its gridSMART program. Under the plan, customers who volunteer for the special pricing will be charged a reduced generation rate during low-cost hours -- defined as midnight to 1 p.m. and 7 p.m. to midnight -- and a higher generation rate during high-cost summer hours -- defined as 1 p.m. to 7 p.m. during the months of June through September. The full PUCO order can be found here. A primer on smart-grid technology is available here.