Mankato Battery Energy Storage Project

Project Details

Docket Numbers
energy storage project26-158
Project Name
Mankato Battery Energy Storage Project
Applicant
Onward Energy Holdings, LLC
Location
Blue Earth County
Description

Mankato Energy Center, LLC (Applicant), a wholly owned subsidiary of Onward Energy Holdings, LLC, proposes to construct a batter energy storage system (BESS) and associated facilities (Project), in Blue Earth County, Minnesota. 

Status
active

Project Contact

Contact
Tessa Kothlow
Phone
651-539-1069

Project Summary

Mankato Energy Center, LLC, proposes to construct the up to 30-megawatt (MW) / 60-megawatt hours (MWh) battery energy storage system (BESS) and associated facilities (Project) in the City of Mankato, Blue Earth County, Minnesota. Associated facilities would include inverters, transformers, electrical systems, and a short underground gen-tie (less than 800 feet). The project will be located entirely within the existing Mankato Energy Center (MEC) and is designed to provide a "behind-the-meter" storage system for the existing MEC Facility's CT2 facility when needed.

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Key Project Documents

Date
Title
Description
07/21/2026
Notice of Complete Site Permit Application and Public Information Meetings 
07/21/2026
Site Permit Application and Environmental Assessment 

Docket Documents

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Date Document ID On Behalf Of Description
August 13, 2026 20268-235240-01 PUC August 13, 2026 Consent
August 13, 2026 20268-235226-01 PUC Proposed Consent Items
August 5, 2026 20268-234951-01 PUC Scoping Summary and Draft Permit
July 30, 2026 20267-234756-02 PUC Oral Public Comments
July 30, 2026 20267-234756-01 PUC Written Public Comments
July 27, 2026 20267-234648-01 LIUNA Minnesota/North Dakota
July 27, 2026 20267-234642-01 Minnesota Department of Natural Resources
July 27, 2026 20267-234642-02 Minnesota Department of Natural Resources Natural Heritage Review letter
July 21, 2026 20267-234459-01 PUC Presentation from Public Meetings
July 9, 2026 20267-233958-01 Mankato Energy Center, LLC Filing Letter, Cert. of Service, Service List
July 9, 2026 20267-233958-02 Mankato Energy Center, LLC Appendix G - Public Cost Figures
July 7, 2026 20267-233854-01 PUC Sample BESS Permit
July 3, 2026 20267-234714-01 Mankato Energy Center, LLC Mankato Free Press Publication of Public Meeting Notice
June 29, 2026 20266-233318-01 PUC NOTICE OF COMPLETE SITE PERMIT APPLICATION AND PUBLIC INFORMATION MEETINGS
June 18, 2026 20266-233067-01 PUC NOTICE OF PLANNING MEETING
June 15, 2026 20266-232904-01 PUC Application Completeness Determination
May 29, 2026 20265-232304-34 Mankato Energy Center, LLC Appendix D-2 Agency Responses 1 of 2
May 29, 2026 20265-232304-39 Mankato Energy Center, LLC Appendix B - Maps 3 of 3
May 29, 2026 20265-232304-44 Mankato Energy Center, LLC Appendix J - Cultural Resources - Redacted
May 29, 2026 20265-232304-33 Mankato Energy Center, LLC Appendix D-2 Cover Page
May 29, 2026 20265-232304-35 Mankato Energy Center, LLC Appendix D-2 - Agency Responses 2 of 2
May 29, 2026 20265-232304-40 Mankato Energy Center, LLC Appendix A - EIP Staff Comments
May 29, 2026 20265-232304-41 Mankato Energy Center, LLC Site Permit Application and Environmental Assessment
May 29, 2026 20265-232304-37 Mankato Energy Center, LLC Appendix B - Maps - Cover Page & Maps 1 of 3
May 28, 2026 20265-232304-18 Mankato Energy Center, LLC Appendix M - T&E Species 4 of 6 - 2025-12-15_Mankato BESS_USFWS NLEB DKey
May 28, 2026 20265-232304-14 Mankato Energy Center, LLC Appendix M - T&E Species - Cover Page
May 28, 2026 20265-232304-26 Mankato Energy Center, LLC Appendix I - Noise Assessment
May 28, 2026 20265-232304-13 Mankato Energy Center, LLC Appendix O - Wildlife Habitat Assessment - 7 of 7 - Desktop Wildlife Habitat Assessment IPaC T&E DKey
May 28, 2026 20265-232304-30 Mankato Energy Center, LLC Appendix F - Decommissioning Plan
May 28, 2026 20265-232304-01 Mankato Energy Center, LLC Appendix P - Cover Page