Maine wants to blow past other states that have committed to increase renewable energy production: It’s aiming to produce so much renewable energy that by 2030 it can export the excess to neighboring states.

A bill (L.D. 658) signed into law May 17 by Gov. Janet Mills (D), directs the governor’s energy office to prepare a plan for the state to become a net exporter of energy by increasing renewable energy generation, energy conservation, and energy efficiency.

“Our state...