RALEIGH, N.C. -- State regulators open hearings on an energy conservation program Duke Energy says will save money for customers and the company.

The News & Observer of Raleigh reported Monday the Charlotte utility says Save-a-Watt would be unlike any other efficiency program.

Duke's chief strategy officer Keith Trent says the program would start next year and cost typical residential customers $1 a month.

Trent says all customers would pay the fee and those who participate would save about $5 a month. Those who volunteer typically would accept financial incentives from Duke to upgrade appliances and get home energy audits.

Critics say Duke would be the primary beneficiary. They say the utility would overcharge the public and deliver minimum energy savings.

Regulatory hearings are expected to last all week.