Maryland residents will see higher electricity bills this month because of changes in supply costs, according to Baltimore Gas and Electric.

The increase, which went into effect September 1, stems from a capacity auction run by PJM Interconnection , which operates the regional power grid.

In a May 30 order , the Maryland Public Service Commission directed BGE to spread recovery of certain supply costs over six months.

That shift means customers will pay more during typically lower-usage months such as spring and fall, helping offset sharper spikes in summer and winter.

BGE said the hike applies only to the electricity supply rate, not the delivery rate.

"Supply price is determined by energy markets; it is outside of BGE's control, and supply costs customers pay through their BGE

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