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Public Requests for Proposals (RFP)

Explore SRP’s selection of publicly posted RFPs to discover new partnerships and projects.

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    SRP Issues Request for Proposal for Non-Inverter Based Long Duration Energy Storage

    SRP’s service territory is experiencing record growth, with SRP’s Integrated System Plan predicting the need to double or triple the amount of generating resources by 2035. The majority of SRP’s service territory includes large portions of Maricopa County, which is one of the fastest growing counties in the nation according to the U.S. Census Bureau. This significant growth, increasing interest from large customers in serving their energy needs with carbon-free resources, and SRP’s commitment to reducing carbon intensity are collectively driving a need to add significant carbon free resources to SRP’s generation portfolio. SRP aims to reduce its carbon intensity by 82% by 2035 relative to a 2005 baseline and reach net-zero carbon emissions by 2050. To reach these goals, SRP plans to significantly increase its solar and battery energy storage capacity. SRP is also interested in exploring alternatives to lithium-ion battery storage.

    To continue providing reliable and renewable power to customers and meet 2035 and 2050 goals, SRP requests proposals for a non-inverter based long-duration energy storage (LDES) pilot facility with a capacity of 5-50 megawatts (MW) and duration of 10 hours. SRP proposes siting of the pilot at its coal-fired Coronado Generating Station (CGS) in St. John’s, Arizona, which is scheduled to be decommissioned in 2032. This RFP is part of SRP’s work to explore other resources to repurpose the site.

    How to participate

    A notice of intent to respond is due by July 10, 2024, and final responses will be collected until November 22, 2024. To respond, please see instructions given in the CGS LDES RFP document. Please contact Innovation@srpnet.com with any questions.


    SRP Issues Request for Proposal for Inverter Based Long Duration Energy Storage

    SRP’s service territory is experiencing record growth, with SRP’s Integrated System Plan predicting the need to double or triple the amount of generating resources by 2035. The majority of SRP’s service territory includes large portions of Maricopa County, which is one of the fastest growing counties in the nation according to the U.S. Census Bureau. This significant growth, increasing interest from large customers in serving their energy needs with carbon-free resources, and SRP’s commitment to reducing carbon intensity are collectively driving a need to add significant carbon free resources to SRP’s generation portfolio. SRP aims to reduce its carbon intensity by 82% by 2035 relative to a 2005 baseline and reach net-zero carbon emissions by 2050. To reach these goals, SRP plans to significantly increase its solar and battery energy storage capacity. SRP is also interested in exploring alternatives to lithium-ion battery storage.

    To continue providing reliable and renewable power to customers and meet 2035 and 2050 goals, SRP request proposals for a non-lithium-ion inverter based long duration energy storage (LDES) pilot facility with a capacity of 5 megawatts (MW) and a duration of 10 hours. The resource will be located at the Copper Crossing Energy and Research Center in Florence, Arizona, which will also host CMBlu Energy's “Desert Blume”, a 5 MW, 10-hour LDES project.

    How to participate

    A notice of intent to respond is due by July 10, 2024, and final responses will be collected until November 22, 2024. To respond, please see instructions given in the CCERC LDES RFP document. Please contact Innovation@srpnet.com with any questions.


    SRP Issues Request for Information for Distribution Connected Solar and Energy Storage Systems

    SRP is requesting information from solar and/or storage installers, financing entities and any other interested parties regarding the installation of distributed solar and/or energy storage systems interconnected directly to SRP’s distribution system.

    SRP serves Maricopa County, one of the fastest-growing counties in the nation. Over the next decade, SRP plans to add thousands of megawatts (MW) of solar and over a thousand MW of battery storage. SRP has experience with large, utility-scale solar and storage systems connected to the transmission system, as well as customer-sited rooftop and/or battery installations that are primarily focused on offsetting behind-the-meter customer load.

    SRP is interested in exploring projects connected directly to its 12 kV distribution system that SRP can use to potentially improve flexibility, reliability and resilience. The purpose of this RFI is to determine what viable installation, aggregation, communication and financing models exist for distribution-connected solar and/or storage systems that could help SRP meet its 2035 Sustainability Goals while minimizing cost impacts to its customers.

    Based on information gathered through this RFI, SRP may issue a Request for Proposal (RFP) at a later date.

    SRP is requesting responses by Aug. 5, 2024.

    Distribution Connected Solar and Energy Storage Systems RFIDocument is a PDF

    How to participate in the Distribution Connected Solar and Energy Storage RFI

    This RFI will remain open until Aug. 5, 2024 and will be administered through Ariba, a web-based platform for hosting solicitations. All communications from respondents to SRP, including questions regarding the RFI, must be submitted via the Ariba messaging system.

    If your company is interested in participating in the Distribution Connected Solar and Energy Storage RFI, please contact Kyle Heckel (kyle.heckel@srpnet.com).