In some states, utilities can also generate and sell electricity, but customers aren’t forced to buy the electricity from the utility company. They may choose from either the utility or available electricity providers. Before signing up for electricity service, we recommend checking the local utility’s electricity supply rate by checking their rates online or contacting them directly.
 1.     Contracts:  Before, there were no contracts.  You signed up or you didn’t.  When it’s the only game in town, you have to play by their rules.  Nowadays, you’ll see these ultra-fabulous rates bandied about but it’s only by carefully scrutinizing the fine print that you’ll discover those wonderful rates come with a one-year lock-down or other catches.
Please note: Your local wires company is still responsible for maintaining the wires and poles, delivery of the electricity, and responding to emergency outages. The only thing that changes is billing and customer service. Texas electricity companies will compete for your business by offering lower prices, added customer service benefits, or renewable energy options. By making a switch to a lower cost Texas energy provider, you can save hundreds of dollars.
The Public Utility Code authorizes the PUC to collect an annual fee of $350 from each licensed / certified supplier, broker, marketer and aggregator of electricity and natural gas approved to do business in the Commonwealth of Pennsylvania. In addition, an annual supplemental fee based on reported annual gross intrastate operating revenues will be applicable to suppliers of electricity and natural gas.
The consumer has the choice between buying from their local utility (Local Distribution Company - LDC) or from one of the deregulated suppliers. There is a large range of contract options from a variable price to 1,3 or 5 year fixed prices. Electricity provider switching is difficult once the consumer is in one of these contracts, unless they are close to the end of a fixed price contract. However, as of January 2010 there is a maximum termination penalty allowed.[2]
Although electricity had been known to be produced as a result of the chemical reactions that take place in an electrolytic cell since Alessandro Volta developed the voltaic pile in 1800, its production by this means was, and still is, expensive. In 1831, Michael Faraday devised a machine that generated electricity from rotary motion, but it took almost 50 years for the technology to reach a commercially viable stage. In 1878, in the United States, Thomas Edison developed and sold a commercially viable replacement for gas lighting and heating using locally generated and distributed direct current electricity.