Associated Press

RALEIGH — About 2 million Duke Energy customers in central and western North Carolina would face an average 6% rate increase if state regulators approve the electric utility’s request.

Duke Energy said Monday it needs another $290 million a year to recoup spending on grid upgrades, coal-ash cleanup and storm repairs and to increase its potential profit margin to 10.3%.

The company also proposes recouping money faster for three coal-burning power plants, potentially leading to earlier closings.

The proposal would add about $8.06 per month to the typical residential customer’s bill.

A rate increase that took effect last year was expected to increase residential rates by 1.2% over four years.

The Duke Energy subsidiary serving eastern North Carolina is expected to file a new rate request within a month.