Jupiter Power is proposing to build and operate the Streamfield Energy Storage Facility. It is a utility infrastructure project comprised of 200-megawatts of battery energy storage in Westfield, Massachusetts. The battery energy storage facility will connect to Eversource's existing Buck Pond substation on Medeiros Way and will play a crucial role in strengthening the power grid.

Map of future Streamfield Energy Storage location
Photo above: The proposed location of the streamfield energy storage facility

Project Location

Streamfield Energy Storage will be located across two parcels on Medeiros Way, west of Route 202 in Westfield. The battery storage facility will be primarily located on the upper portion of the northern parcel and the project's substation, the infrastructure that connects the battery storage facility to the grid, will be located on the southern portion. The generation tie-line will run the short distance down Medeiros Way to interconnect at the Buck Pond substation, which is immediately adjacent to the southern parcel.

Why battery storage?

  • Emergency support Batteries are an excellent way to deploy energy instantaneously for us in times of need, assisting with preventing and recovering from outages.
  • Customer Demand Homes and businesses need reliable energy at all time. Morning and evening hours are typically when the largest amount of energy is needed from the grid to serve customers. During these times, we can pull energy from batteries to meet the high demand.
  • Maintain stability Supply and demand of energy fluctuate throughout the day and changes in either can affect grid stability. Batteries help even out the fluctuation of energy on the grid.
battery modules inside a container at one of Jupiter Power’s projects in Texas.
Photo above: battery modules inside a container at one of Jupiter Power’s projects in Texas.
construction personnel finalize commissioning at a Jupiter battery site.
Photo above: jupiter power storage site facility in west texas

Community Benefits

The Streamfield Energy Storage Facility will benefit local residents and businesses by improving the power grid and supporting the local economy. Major benefits will include:
  • Improved reliability, efficiency, and resiliency of the regional power grid without an increase in electricity bills.
  • Increased integration of existing and future renewable resources like solar and offshore wind projects across Massachusetts and New England.
  • Benefits of a major financial investment in the project with the potential for significant, predictable local government revenue.
  • These are industrial level investments without some of the emission and community impacts of other industrial investments.

Project Status

We are currently developing applications for review by the Massachusetts Environmental Policy Act (MEPA) Office and the Energy Facilities Siting Board (EFSB).

We plan to start construction in 2024 and be in service by mid-2026.

Further updates to project schedules will be posted on this website.

Upcoming Events

Westfield Community Meeting
Tuesday, January 24, 2023 | 6:30 PM - 8:00 PM
Westfield-Barnes Regional Airport
110 Airport Road
Termindal Building
Westfield, MA 01085

Livestream: https://bit.ly/3HdyDhY
Construction personnel check system performance during commissioning
Photo above: construction personnel finalize commissioning at a Jupiter battery site.