Exelon's proposed acquisition of Pepco Holdings has been re-energized by D.C. regulators, who agreed to reopen the case and denied intervenor status to a group that wants to buy Pepco's district assets.

The D.C. PSC voted to reopen the Exelon-Pepco merger to consider a proposed settlement with Mayor Muriel Bowser’s administration, with closing briefs due Dec. 18.

With the D.C. PSC poised to decide Wednesday on a timeline to consider the revised terms in Exelon’s bid for Pepco, opponents spoke out Monday about why they still think the merger is a bad deal for the district.

The Members Committee overwhelmingly agreed last week to fund a $450,000 budget for the Consumer Advocates of the PJM States (CAPS), in part through an assessment on electric customers.

NSTAR Electric had challenged the sale of five power plants in the Boston area worth about 2,654 MW from various entities to Constellation for $1.1 billion.

Parties opposed to the Exelon-Pepco merger told the D.C. Public Service Commission that it should not reopen the record to consider the new settlement between Mayor Muriel Bowser's administration and the companies.

A newly formed advocacy group on Friday filed its intent to acquire the district assets of Pepco Holdings Inc. and transform it into a not-for-profit utility that it said will generate about $1 billion in savings over the next 20 years.

D.C. Public Power on Friday will release details of a proposed alternative to the Exelon-Pepco Holdings Inc. merger that it says would provide up to $1 billion in benefits to the district over the next 20 years.

Exelon spokesman Paul Elsberg confirmed that the concessions the company agreed to in its bid to win D.C.’s approval of its takeover of Pepco could result in changes to the deals already struck with Delaware, Maryland and New Jersey.

With the administration and public advocate on its side, Exelon's chances of closing their acquisition of Pepco appear to hinge on winning a ‘yes’ vote from PSC Chairman Betty Ann Kane or Commissioner Joanne Doddy Fort.