Gov. Maggie Hassan has signed into law a plan allowing New Hampshire's largest utility to sell its fleet of power plants.
Eversource Energy says selling the nine Public Service Company of New Hampshire hydro facilities and three fossil fuel plants could mean a savings of $300 million to ratepayers.
The plants to be sold include the Merrimack Station in Bow, Newington Station and Schiller Station in Portsmouth.
The deal also says the company can recover all but $25 million of the $422 million it spent on a pollution-reducing scrubber.
When the plants are sold, Eversource will buy energy for its New Hampshire customers on the open market.
The plants must operate for at least 18 months following their sale and employees would be protected by current collective bargaining agreements.