Section 83E Round 1 Selection Announcement

DOER and the Distribution Companies have completed the evaluation of bids received in response to the Section 83E Storage request for proposals (“Section 83E 1 RFP”). The bid evaluation process included monitoring and assistance by an Independent Evaluator.

DOER selected Energizar (FlatIron Energy), River Mill Storage (Rhynland Energy), Trimount ESS (Jupiter Power), and Salt Cod (FlatIron Energy) for a total of 1,268 MW of energy storage capacity.

The final acceptance of the bids and the award of contracts is conditional upon successful negotiation of mutually acceptable long-term contracts between the bidders and each of the Massachusetts Distribution Companies, as well as required regulatory approvals of such contracts, as provided by the RFP.

83E Round 1 Selection Delay

DOER has notified the Department that it is in the process of finalizing selection in consultation with the Independent Evaluator and the Evaluation Team is extending the Bid Selection Date.  All subsequent solicitation schedule dates will remain the same as detailed in the Department’s Order.  

DOER will keep the Department informed of the progress towards the selection of proposals and the ultimate execution of contracts consistent with the remainder of the Section 83E timetable in the Order.

Section 83E RFP: Responses to Bidder Questions

In accordance with the 83E RFP for Long-Term Contracts for Energy Storage Projects, prospective bidders were allowed to submit written questions to the Evaluation Team pertaining to the solicitation. All questions were to be submitted to the Evaluation Team at maRFP83E@gmail.com no later than August 21, 2025. The Evaluation Team is under no obligation to answer any question submitted after August 21, 2025.

The Evaluation Team has posted responses to questions. Please find the responses at the 83E Q&A page.