Maryland allows competitive supply for BGE, Pepco, Delmarva Power, and Potomac Edison customers. Default 'Standard Offer Service' is set by auction. Some competitive suppliers offer fixed plans below SOS — but the Maryland PSC has issued warnings about a long list of bad-faith suppliers.
Find your utility's current SOS price on your bill.
Use the PSC's shopping site (linked above).
Filter for fixed-rate plans, no cancellation fee, no monthly fee.
Beat the SOS by at least 0.5¢/kWh after all fees.
When you switch suppliers, your delivery utility doesn't change — they still maintain the wires and respond to outages. Only the energy charge on your bill changes.