Many organizations want to save energy because of increasing costs for electric power. Costs for electricity vary widely across the U.S., with most utility rates rising steadily for a variety of reasons.For example, in the San Francisco Bay area, one wastewater treatment plant was charged $0.24 per kWh at non-peak times. On Long Island, N.Y., some companies are paying that rate or higher. The U.S. national average is around $0.10 per kWh non-peak, with industrial users often paying penalties for excess demand.VFDs for savingsTo save on electrical costs, many companies are using variable-frequency drives (VFDs) to control centrifugal loads. In
