TDSPs or EDUs are the companies and people who own and maintain utility poles and power lines. They are the ones that you call when your power goes out. These utility companies are responsible for the physical delivery of electricity to your home or business. Before deregulation, everyone was required to buy their electricity from their local utility company. With deregulation, the supply of electricity was opened to competition while the delivery of electricity continues to be regulated by the state’s public utility commission.
As an Exelon company, Constellation Energy is part of one of the biggest — and historically most polluting — corporations in North America. Given Exelon’s vast production energy, ranking on the PERI Toxic 100 list is perhaps not that surprising. The good news is that Exelon is upfront about its room for eco-friendly improvement and make it easy for Constellation customers to go green, too.
In Pennsylvania, you can choose from the EGSs operating in your area, or stay on with your default provider — your EDC. Currently, less than half of all Pennsylvania’s residential customers have made the switch. If you’re among that number, moving to an EGS could get you cheaper rates, better rewards, and more say in what fuels generate your electricity. Whichever you choose, your electricity will get to you just the same because the EDC is always responsible for delivery.
Retailers Include: AEP Energy , APG&E Energy Solutions , Calpine Energy Solutions , Constellations NewEnergy, INC , Crius Energy , Direct Energy Services LLC , Dynegy , ENGIE Resources , Entrust Energy , IGS Energy , Just Energy , Liberty Power , Next Era Energy Services , Nordic Energy Services, LLC , NRG Energy INC , Source Energy , Spark Energy , Starion Energy , Stream Energy , Talen Energy , TransCanada Power Marketing LTD. 
As a renter, you’re likely concerned about getting your electricity contract’s start and end dates to match your lease term as close as possible. In most cases, your electricity provider will offer flexible start dates and some even offer same-day connections. If you can’t line up your electricity contract exactly with your lease term, it’s okay. It’s better to choose an electricity plan with a slightly longer contract term than your apartment lease if necessary. If you move and provide proof of a change in address, your electricity provider cannot charge you an early termination fee.
As of April 2014, 16 U.S. states and the District of Columbia have deregulated electricity markets. Along with aforementioned Maryland and Texas, electricity deregulation is current in Connecticut, Delaware, Illinois, Maine, Massachusetts, Michigan, Montana, New Hampshire, New Jersey, New York, Ohio, Oregon, Pennsylvania, and Rhode Island. Seven additional U.S. states began the process of electricity deregulation but have suspended efforts: Arizona, Arkansas, California, Nevada, New Mexico, Virginia, and Wyoming.
Around 85% of Texas residents must choose an electricity provider. Utility companies transmit and distribute electricity to customers. But that electricity doesn’t come from a utility—it comes from companies known as Retail Electric Providers. These providers offer competitive plans based on electricity pricing, term length, renewable sourcing and more.
In some deregulated markets, the local utility company can offer electric service at a standard service rate which is regulated by the state. In other deregulated markets, customers can receive electricity from a default electricity provider that may be related to their local utility. These are options for customers who don’t want to shop for an electricity plan and explore the possibility of a lower electricity bill.
Variable-rate supply plans, as the name suggests, have a rate that varies based on the market price of electricity. Seasonal and market fluctuations can affect supply rates. While variable-rate supply plans can allow you to take advantage of market-price lows, there is the possibility of paying for high supply rates when demand is at its peak. These plans offer great flexibility.
It’s worth noting that you can switch for free with no exit fee 42-49 days before the end of your contract. Under Ofgem’s standards of conduct, energy firms have to give you between 42 and 49 days’ notice of your tariff ending. You can use this time to decide whether to stick with them, or switch. If you decide to switch, you won’t be charged an exit fee.