Coloradans will pay nearly three times more per kilowatt hour during peak times through Sept. 30.. DENVER – Xcel Energy customers in Colorado with smart meters will start paying more for electricity during certain hours this summer starting Monday, a measure company officials said is aimed at saving “everybody money.” The "time of use" pricing rate, which went into effect June 1, means Xcel customers will pay more than two times the price per kilowatt hour (kWh) if using energy during peak time hours, from 1 p.m. to 7 p.m. on weekdays. Customers using electricity within that timeframe will see...