2026 South Carolina Battery Storage Request for Proposals
Duke Energy Carolinas and Duke Energy Progress seek up to 600 MW of battery storage in South Carolina via ESSA or UOT structures, with bids due August 5, 2026. Proposers must submit a Notice of Intent to Respond and confidentiality agreement by July 21, 2026, and comply with approved vendor and technical requirements.
Categories
Important dates
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Published
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UOT Energy Storage Requirements Document Updated
Revised technical requirements document posted
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Notice of Intent to Respond (NOIR) Due
Submit NOIR form and Project Evaluation Confidentiality Agreement
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Bid Submission Due
ESSA and UOT Bid Input Forms due
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Submission deadline
Deadline passed
AI overview
Duke Energy Carolinas (DEC) and Duke Energy Progress (DEP) are jointly issuing a Request for Proposals (RFP) for new battery energy storage system (BESS) resources to be located in the Duke Energy Progress South Carolina (DEP-SC) and Duke Energy Carolinas South Carolina (DEC-SC) territories. The RFP seeks proposals for utility-owned transfer (UOT) and energy storage services agreement (ESSA) structures to procure up to approximately 600 MW of battery storage capacity, with commercial operation dates anticipated between 2028 and 2030. The procurement is being conducted through the 2026 Resource Solicitation Cluster (RSC) process, which allows bidders to propose projects that can be evaluated and potentially selected for development.
The RFP documentation includes a comprehensive set of forms and agreements, including a pro forma Energy Storage Services Agreement (ESSA), Asset Purchase Agreement (APA) for UOT projects, and various technical exhibits covering survey requirements (LiDAR, ALTA surveys), geotechnical scope, and energy storage system technical requirements. Bidders must submit a Notice of Intent to Respond (NOIR) and Project Evaluation Confidentiality Agreement by July 21, 2026, with final bid submissions (ESSA Bid Input Form and/or UOT Bid Input Form) due by August 5, 2026. The RFP document itself was updated on July 7, 2026, with a subsequent revision to the UOT Energy Storage Requirements document on July 15, 2026.
Key technical and commercial requirements include the use of approved vendors from Duke Energy's Approved Vendors List for major equipment, compliance with interconnection cost estimates provided by DEC and DEP, and adherence to the 2026 Resource Solicitation Cluster process. For UOT projects, bidders must follow specific asset transfer technical guidance and survey requirements, including use of approved MSA (Master Services Agreement) vendors for survey services. The financial security requirements include provisions for letters of credit and surety bonds, with required financial information forms to be submitted as part of the bid package.
The evaluation of proposals will be based on criteria detailed in the sample scoring sheet, which includes factors such as project viability, cost competitiveness (including capacity pricing, energy pricing, and ancillary service values), development status (site control, permitting readiness, interconnection queue position), and the bidder's experience and financial strength. The RFP is being administered with support from CRA International, with a pre-solicitation report available. Duke Energy reserves the right to evaluate proposals based on the overall portfolio value to customers, including consideration of the 2026 Resource Solicitation Cluster process which coordinates multiple resource procurements.
Resources & contact
Proposal Document
View proposal documentSolicitation number
2026-SC-Battery-RFP
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