Energy Storage Facility | Uxbridge, Massachusetts
Project Taft delivers reliable power to local homes and businesses during high-demand periods to lower rate-payer costs and support communities across Massachusetts as demand grows. The system utilizes safe and reliable energy storage technology deployed by Flatiron Energy.
Site preparation
Construction begins
Grading, restoration and foundation
Major equipment deliveries
Battery deliveries
Project testing & commissioning
Flatiron Energy in Uxbridge, Massachusetts. When completed, Taft will store up to 800 megawatt-hours (MWh) of energy, providing reliable electricity to local homes and businesses during peak demand. The facility is scheduled to commence operations in December 2026.
The system is named after Lydia Chapin Taft, America’s first woman voter, who cast her initial ballot in Uxbridge in 1756.
This is the system’s maximum power output at any given time.
1 megawatt (MW) = 1,000,000 watts.
Real-world example:
200 MW of power can illuminate 2 million 100-watt light bulbs.
This is the maximum amount of energy the system can store.
1 MW of power sustained for an hour = 1 MWh.
Real-world example:
800 MWh is enough energy to power around 40,000 Massachusetts households for one month.
Project Taft is located along a constrained transmission line corridor that was previously an industrial development. This project is a revitalization of land that has gone unused for nearly a decade.
The system will utilize containerized batteries, which are safe, reliable, and minimally disruptive to residents and the natural environment.
Project Taft will create up to 30 jobs for on-site, daily construction. Flatiron Energy is committed to hiring local skilled workers for hands-on work.
Project Taft will transform a site that was underutilized for nearly a decade — into one that will contribute to reducing ratepayer costs and reliable power distribution.
Battery storage is a critical element for enhancing grid dependability. Systems like Project Taft store and distribute power created by solar, wind, and other forms of energy, making it more useful during times when it's most needed.
Situated near transmission lines that carry power generated by renewables and other generation sources, Project Taft moves power closer to the homes and businesses that use it.
The facility will distribute energy to local homes and business during periods of high demand, reducing the need for more expensive forms of generation.
Battery energy storage systems (BESS) support reliable energy by holding surplus energy for use when demand increases. The result is cleaner air, reduced pollution, and more affordable energy. Taft will be a critical step in helping Massachusetts achieve its emissions goals by 2050.
Renewable energy sources produce power intermittently. Often, electricity demand does not align with when renewables produce the most energy.
Batteries capture and hold the energy created by renewables and other sources so it can be used later. Without storage, any energy that isn’t immediately used is lost.
During times of peak energy demand, batteries release stored energy onto the grid. This helps prevent blackouts and grid instability. Batteries also provide key grid stability services during all hours of the day.
Discretionary permits received
Construction begins
Construction is completed
Target launch date
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