PORTLAND, Maine — Maine has cracked the top 20 in a ranking of states by adoption of clean energy and energy efficient technology.

The company CleanEdge, which tracks the clean technology industry, bumped Maine up four spots to 18th place in its overall rankings for 2016, putting it closer in the rankings to its New England counterparts.

Maine was ranked last in the region; Massachusetts and Vermont led the region, ranked second and third overall.

Maine jumped 11 places since 2014 in the index that factors in clean energy generation, efficient building construction, expenditures on energy efficiency, policy and venture capital investment.

Jeff Marks, the director of the clean technology industry group E2Tech said the new index bolsters a study his group commissioned showing economic promise of businesses specializing in clean technology in Maine.

“The growth of clean technology overall has outpaced the overall Maine economy and businesses are expanding and expect positive growth in the future,” Marks said.

In the latest rankings, Maine ranked was one of five states with more than two-thirds of power generation from clean sources, including biomass, hydropower, wind, solar and geothermal. The state dropped to second for the share of customers who have smart electricity meters.

Marks said that companies like clean energy management system maker Pika Energy, tidal and river power developer Ocean Renewable Power Co. and sustainability software maker Rapport contributed to Maine’s rise in CleanEdge’s technology ranking, to 9th from 15th one year ago.

Darren Fishell

Darren is a Portland-based reporter for the Bangor Daily News writing about the Maine economy and business. He's interested in putting economic data in context and finding the stories behind the numbers.