CHARLESTON, W.Va. (AP) — A public hearing in Charleston is focusing on whether a power plant transaction between two FirstEnergy subsidiaries makes sense.

The Public Service Commission begins hearing testimony Wednesday and continues through Friday.

FirstEnergy officials say the hearing could continue into next week, but a decision may be months away.

Ohio-based FirstEnergy says selling the Harrison Power Station would be good for customers and a cheaper way to meet demand than buying power on the spot market.

But environmentalists and consumer groups say the deal is overvalued, concentrates too heavily on coal and does little to promote energy efficiency.

Allegheny Energy Supply would transfer full ownership of the plant to Mon Power, which currently owns 20 percent.

Mon Power would then sell its share of the Pleasants Power station to AE Supply.