Just as cellphone customers delay personal calls until they become free at night and on weekends, and just as millions of people fly at less popular times because air fares are lower, people who know the price of electricity at any given moment can cut back when prices are high and use more when prices are low. Participants in the Community Energy Cooperative program, for example, can check a Web site that tells them, hour by hour, how much their electricity costs; they get e-mail alerts when the price is set to rise above 20 cents a kilowatt-hour.via NY Times
If just a fraction of all Americans had this information and could adjust their power use accordingly, the savings would be huge. Consumers would save nearly $23 billion a year if they shifted just 7 percent of their usage during peak periods to less costly times, research at Carnegie Mellon University indicates. That is the equivalent of the entire nation getting a free month of power every year.
Meters that can read prices every hour or less are widely used in factories, but are found in only a tiny number of homes, where most meters are read monthly.
The handful of people who do use hourly meters not only cut their own bills, but also help everyone else by reducing the need for expensive generating stations that run just a few days, or hours, each year. Over the long run, such savings could mean less pollution, because the dirtiest plants could be used less or not at all.