Iberdrola dropped its bid to acquire UIL Holdings but promised to file a new application that would address Connecticut regulators' objections.

Connecticut regulators said they will reject Iberdrola SA’s acquisition of UIL Holdings without much stronger ratepayer protections and assurances over local control.

Connecticut environmental officials are at odds with utility regulators over whether the state should seek cleanup of an abandoned power plant as a condition for Iberdrola’s acquisition of UIL Holdings.

Allco Renewable Energy Group has challenged a three-state effort to bring more renewable energy to New England.