Project scope
Proposed battery energy storage system rated up to 300 MW and approximately 1,200 MWh; the project summary describes up to 300 MW for four continuous hours and a 300 MW Generator Interconnection Agreement with MISO. The project description says it will primarily use lithium iron phosphate (LFP); the summary says LFP was selected, while final technology and equipment specifications remain to be determined during procurement and final engineering. Preliminary design includes approximately 260 battery units, 65 medium-voltage transformers, two main power transformers, inverters, electrical feeder lines, a substation, and an approximately 1,300-foot 115-kV generation interconnection line. The site encompasses approximately 154 acres; approximately 31 acres are designated for preliminary development, including a temporary two-acre laydown yard to be restored after construction, and the permanent operational footprint is approximately 29 acres. Areas outside the designated development footprint are to remain undisturbed.
Reported status and procurement
- Reported development
- Not established
- Procurement availability
- Unknown / not established
Reported procurement
The project summary reports that Xcel Energy is evaluating Sungrow battery equipment and that final technology and equipment specifications are to be determined during procurement and final engineering. The supplied project details do not document an open procurement.
Reported regulatory context
Docket 26-281. Northern States Power, doing business as Xcel Energy, is listed as applicant. The project description says it submitted a Site Permit Application to the Minnesota Public Utilities Commission under the standard review process; the page labels the docket status “active.” These details do not establish permit approval or construction.
A source report alone does not establish current progress or an open buying window.
Project summary
Nobles Energy Storage Project
The project is also described as the Nobles Battery Energy Storage System Project. It is proposed in Nobles County, approximately 0.5 mile north of Reading, near 190th Street and McCall Avenue, adjacent to the existing Nobles County Substation.
The proposed battery storage system is rated up to 300 MW and approximately 1,200 MWh; the project summary describes up to 300 MW for four continuous hours. These are proposed ratings, not operating output. The preliminary design includes battery units, transformers, inverters, a substation and an approximately 1,300-foot 115-kV generation interconnection line. The project description says the system will primarily use lithium iron phosphate (LFP); the summary says LFP was selected, but final technology and equipment specifications remain to be determined.
Northern States Power, doing business as Xcel Energy, is listed as applicant. The project description says it submitted a Site Permit Application under the standard review process, and the docket page labels docket 26-281 “active.” Neither establishes permit approval or construction. Xcel anticipates permit approval in Q2 2027, construction beginning in Q3 2027 and commercial operation in Q4 2028; these are forecasts.
The project summary reports that Xcel is evaluating Sungrow battery equipment; it does not document an open procurement.
**Reading scope:** This account is based on selected visible text from the project page: its title, project details, project summary and key-project-documents section (u0001–u0028). The supplied context says linked documents and images were not acquired or interpreted and that the whole document was not reviewed. The reviewed units do not establish a source publication date.
Evidence limits and unknowns
The cited project details do not establish permit approval, construction progress, actual operating output or a final interconnection design. The approval, construction and operation dates are anticipated milestones.
The project summary leaves final battery technology and equipment specifications to procurement and final engineering; it does not document procurement availability or an award.
The reviewed page units do not show a source publication date; linked documents and images were not acquired or interpreted.
