Maryland residents are now able to choose who supplies their electricity. (Customers of municipal electric systems and some rural cooperative systems are the exceptions - see "Areas not participating.") Your local utility, now called your electric company, will still deliver the electricity to your home, but you can choose another company to generate the electricity, if other companies are making an offer in your area.
As a renter, it’s important to know approximately how much electricity you will use each month in order to get the best deal on electricity. Some electricity plans are cheaper for lower energy usage customers, while other plans are designed with high usage customers in mind. If you’re just moving into an apartment, ask your leasing agent to provide you with historic kWh usage information for your specific unit if possible.