PORTLAND, Maine (AP) Maine’s largest electric utility ranks at the bottom for the third consecutive year in a national survey of business customers.

CMP came in last place on J.D. Power’s survey of business customers of 88 electric utilities.

J.D. Power also ranked CMP last in a similar survey of residential customers last year.

But David Flanagan, CMP’s executive chairman, says the company scored 50 points higher than it did last year, and it has introduced an app that’s in line with the survey’s finding that digital tools are important to customers.

CMP was at the top of the list in 2013, when it got the best score among midsize electric utilities in the East.