Energy charges are the cost per kWh (kilowatt hour). Residential electricity is often charged on electrical energy (kilowatt hour, kWh). An electricity meter measures energy directly in kilowatt hours. The residential cost per kilowatt hour of electricity is just over 6 cents. One kilowatt hour is 3,600,000 watt seconds. They projected a cost of 2.85 cents per kilowatt hour. The cost is around 7.2 cents per kilowatt hour. United Technologies makes fuel cells costing $4,500 per kilowatt. The kilowatt (kW) is equal to one thousand (10) watts. One kilowatt is approximately equal to 1.34 horsepower. The rate varied monthly around 23 cents per kilowatt. Residential electric power plans use kilowatt hours. Consumer energy prices were 8-12 euro cent per kilowatt hour. It was also lower than NTPC's average coal power tariff of 3.20 per kilowatt hour. The amount one can offset will sink annually by per kilowatt hour.