Hull Street Energy Expands Power Portfolio with 1,263 MW Acquisition in PJM Market

## Hull Street Energy Completes Major Peaking Plant Acquisition in PJM Region Bethesda and Houston-based power investment firm Hull Street Energy, LLC (HSE) has finalised the acquisition of two peaking power plants with a combined capacity of 1,263 megawatts from Rockland Capital, LP, according to a PR Newswire release dated August 26, 2026. The transaction expands HSE's Milepost Power portfolio and reinforces the firm's strategic focus on power generation assets within the PJM Interconnection — the largest wholesale electricity market in North America, serving over 65 million people across 13 states and the District of Columbia. ### Strategic Significance Peaking plants play a critical role in grid reliability, providing on-demand generation capacity during periods of peak electricity demand. Their importance has grown considerably in recent years as the energy transition places new pressures on grid operators to balance intermittent renewable generation with dispatchable backup capacity. For the maritime sector, stable and resilient grid infrastructure carries direct relevance. Port electrification initiatives, shore power programmes for vessels at berth, and the expanding network of charging infrastructure for electric harbour craft and tugs all depend on reliable regional power supply. The PJM market underpins electricity supply to several of the U.S. East Coast's most significant port complexes, including those in the Baltimore, Philadelphia, and New Jersey regions. ### Transaction Details HSE confirmed the deal was funded through a structured financing arrangement, though specific financial terms were not disclosed. Rockland Capital, LP, a Houston-based energy-focused private equity firm, was the seller in the transaction. HSE describes itself as a leading power-focused U.S. investment firm, and the Milepost Power platform represents its operational generation business. The addition of 1,263 MW of peaking capacity marks a substantial expansion of that platform's footprint in one of the country's most competitive wholesale power markets. ### Broader Context The acquisition reflects continued investor appetite for dispatchable generation assets at a time when grid operators are under increasing scrutiny over capacity adequacy. PJM has faced well-documented concerns regarding reserve margins in recent capacity auctions, making peaking assets in the region particularly sought after. As ports and maritime operators across the U.S. East Coast accelerate electrification plans, the health and investment profile of the underlying power grid will remain a closely watched factor for the industry. *Source: PR Newswire*