National Grid seeks 5.7% rate increase for Rhode Island

PROVIDENCE, R.I. (AP) — National Grid officials say a 5.7 percent increase to Rhode Island’s electricity rates is needed because of the rising costs of transmission and meeting state renewable energy mandates.

The power company has submitted a rate increase proposal to the state Public Utilities Commission, which is set to review the plans March 27 and 28. National Grid wants the new rates to take effect on April 1.

National Grid spokesman David Graves says costs are increasing for renewable energy certificates, which the company must buy under state law to show that renewable resources were used to generate a certain amount of electricity.