Specifications include, but are not limited to: To continue providing reliable and renewable power to customers, as well as meet our 2035 and 2050 goals, SRP requests information from vendors of non-inverter based long duration energy storage (LDES) technologies and/or LDES technologies that have mechanical inertia. SRP aims to improve understanding of the performance and costs associated with these types of long duration energy storage technologies. SRP will use the results of this RFI planning purposes and will inform our approach to a subsequent Request for Proposals (RFP) that may be issued in mid to late 2024 for pilot LDES projects with a targeted commercial operation date (COD) of 2027-2028. Eligible Technologies -- • SRP is requesting information for demonstration projects at least 5 MW in size, up to 50 MW. SRP will consider proposals including larger projects, but it is unlikely that SRP will include projects larger than 50 MW in the subsequent RFP. SRP may consider projects over 50 MW under different future procurement efforts. • Eligible storage technologies must be non-inverter based or have mechanical inertia. • SRP will also consider technologies that can be paired with existing gas or steam turbines. However, for the purposes of the demonstration project, it is assumed the respondent would provide an entire new system including the turbine. • SRP desires a target duration of 10 hours at the rated discharge capacity but will consider LDES technologies that can provide between 8 and 12 hours. • SRP is primarily interested in power purchase agreement options for the future RFP but will only require a capital cost estimate, as well as operating and maintenance costs, for the purposes of this RFI.
