We are required to buy electricity for customers who do not choose an alternative
electricity supplier. Customers are charged for electricity - called Standard
Offer Service (SOS) - under rates approved by the Maryland Public Service
Commission. Under a settlement with the Commission, we began
offering SOS supply at market-based rates in Maryland on June 1, 2004.
Each year in June and
October, supply rates are adjusted to reflect the cost of power that we buy on behalf of our customers who do not contract with an alternative
For Maryland residential
customers, the new summer SOS rate will increase the average monthly summer
bill by about $6.00 beginning June 1, 2015. The new winter SOS rates for
Maryland beginning October 1, 2015 have not yet been set.