The state's advocate for residential utility customers says American Electric Power's proposed rate plan could raise next summer's rates for many Ohio customers by 31 percent.
The office of the Ohio Consumers' Counsel said Tuesday that the proposal would shift rates for generating electricity, leaving residential customers paying more in relation to commercial and industrial users. It argues instead for a uniform rate change across all categories.
AEP spokeswoman Terri Flora says the shift would bring rates more in line with actual costs and reflect an increasingly competitive market. She says 2012 increases for all customer categories would average about 1.5 percent.
An AEP filing with the state Public Utilities Commission shows generation rates for residential customers would increase 5 to 6 percent in 2012.
The plan would require the commission's approval.