Duke offers these two: TOU (Time-of-Use) with Peak at around 27.65 cents per kWh during peak hours, and 10.47 cents during off-peak hours, and a discounted rate at about 6.8 cents per kWh. TOUD (Time-of-Use with Demand), with on-peak at 14.4 cents per kWh, off-peak at 6.1 cents, and a discounted rate at 4 cents. More @Wikipedia
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