Plus Power Brings Online 350-MWh Cross Town BESS in Maine

Why It Matters

The facility provides critical grid flexibility, lowers peak‑price electricity, and accelerates renewable integration, strengthening New England’s energy resilience.

Key Takeaways

• 175 MW, 350 MWh battery, New England’s largest BESS.
• 156 Sungrow PowerTitan units installed on five-acre site.
• Alleviates congestion at Central Maine Power’s 115‑kV substation.
• Enables wind power from northern Maine to serve southern loads.
• Advances Maine’s 400 MW storage target for 2030.

Pulse Analysis

Battery storage is rapidly becoming a cornerstone of the Northeastern United States’ clean‑energy transition, and Plus Power’s Cross Town project exemplifies that shift. At 175 MW of dispatchable power and 350 MWh of capacity, the system is large enough to smooth short‑term fluctuations while also providing firming services for intermittent renewables. The use of Sungrow’s PowerTitan technology underscores a broader industry move toward modular, containerized solutions that can be deployed quickly and scaled efficiently.

Strategically sited next to Central Maine Power’s 115‑kV Moshers substation, the facility directly tackles a known transmission bottleneck. By injecting stored energy during peak demand, Cross Town reduces the need for costly fossil‑fuel peaker plants and eases congestion, which in turn improves market pricing signals for both generators and consumers. The location also creates a conduit for wind generation from northern Maine to reach load centers in the south and even Boston, enhancing the overall utilization of renewable assets across ISO New England.

From a business perspective, the project signals robust investor confidence in large‑scale BESS as a revenue‑generating asset class. Plus Power’s partnership with local EPC firm Cianbro demonstrates the growing ecosystem of regional expertise supporting storage rollouts. As states like Maine pursue aggressive storage targets—400 MW by 2030—the market is likely to see a pipeline of similar projects, offering opportunities for technology providers, developers, and grid operators to capture new value streams through ancillary services, capacity markets, and long‑term power purchase agreements.