Flatiron Energy upsizes credit facility to US$250 million for BESS portfolio

October 31, 2025
LinkedIn
Twitter
Reddit
Facebook
Email

Developer Flatiron Energy has increased its US$125 million credit facility with certain funds and accounts managed by HPS Investment Partners, to US$250 million.

The company says it will use the credit facility to cover development and construction costs related to its portfolio of approximately 4.5GW/18GWh of utility-scale battery energy storage system (BESS) assets that are currently being developed or constructed.

Additionally, Flatiron’s existing equity capital partner, Hull Street Energy (HSE), has increased its equity commitment to the company. Flatiron believes this positions the company to become a “premier regional IPP” in the Northeast US power market.

In September, Flatiron secured around US$540 million in financing commitments to fund the construction and operation of the 200MW/800MWh Taft BESS project in Uxbridge, Massachusetts.

This article requires Premium SubscriptionBasic (FREE) Subscription

Enjoy 12 months of exclusive analysis

Not ready to commit yet?
  • Regular insight and analysis of the industry’s biggest developments
  • In-depth interviews with the industry’s leading figures
  • Annual digital subscription to the PV Tech Power journal
  • Discounts on Solar Media’s portfolio of events, in-person and virtual

Or continue reading this article for free

The financing commitments totalling US$540 million include construction and bridge loan facilities, term loan facilities, letter of credit facilities, a preferred equity commitment, and a tax credit transfer commitment.

Together, the new corporate capital will enable Flatiron to complete development and start construction on several projects in New England.

It will also support expanding its pipeline in other parts of the Northeast and Mid-Atlantic, which the company claims demands substantial investments in clean battery storage capacity.

Recently, Energy-Storage.news Premium reported that Flatiron commenced initial proceedings to construct a 168MW/672MWh BESS at the site of a former coal-fired power plant located in Bristol County, Massachusetts. 

During a recent Town of Somerset Board of Selectmen meeting, Erin Baker, the company’s vice president of development, outlined the company’s plans for the site.

As described in the community presentation, Flatiron plans to build a 168MW BESS called Salt Cod Storage at the site of the former Montaup Power Plant on the west bank of the Taunton River in Somerset, Massachusetts.

Flatiron highlighted its strong history in the Northeast and its relationship with HSE upon announcing its larger credit facility, with Rob Brink, the company’s Chief Financial Officer and Co-Founder, commenting:

“Since Flatiron’s founding, HSE has supported our rapid growth in our core markets, thanks in part to their deep understanding of power markets, especially in Massachusetts and New York. We appreciate HSE’s expanded support and look forward to leveraging our combined expertise and resources to continue our growth.”

24 February 2026
InterContinental London - The O2, London, UK
This isn’t just another summit – it’s our biggest and most exhilarating Summit yet! Picture this: immersive workshop spaces where ideas come to life, dedicated industry working groups igniting innovation, live podcasts sparking lively discussions, hard-hitting keynotes that will leave you inspired, and an abundance of networking opportunities that will take your connections to new heights!

Read Next

Premium
November 18, 2025
ESN Premium speaks with Mukesh Chatter of Alsym Energy about the potential advantages of sodium-ion energy storage.
November 17, 2025
Australia’s DCCEEW has announced that the Capacity Investment Scheme Tender 8 will launch later this month seeking 16GWh of energy storage.
November 14, 2025
Sodium-ion (Na-ion) battery energy storage system (BESS) startup Peak Energy has announced a multi-year phased agreement with developer Jupiter Power to supply up to 4.75GWh of Na-ion BESS.
November 13, 2025
Critical minerals manufacturer and lithium-ion battery recycling company American Battery Technology Company (ABTC) has been selected to recycle batteries from the Moss Landing Energy Storage Facility in Monterey County, California, US.
Premium
November 13, 2025
On 4 September, US Immigration and Customs Enforcement (ICE), along with multiple other law enforcement organisations, raided Hyundai Motor and LG Energy Solution’s electric vehicle (EV) battery cell plant in Ellabell, Georgia, US.