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Solicitations › Department of Defense › Defense Advanced Research Projects Agency (DARPA)

Solid-State Energy Conversion from Heat to Electricity Request for Information (RFI)

Open — responses due 23 Nov 2026 (28 days left) · Unrestricted (full and open) · Defense Advanced Research Projects Agency (DARPA), DoD · NAICS 541715 · Solicitation DARPA-SS-27-01

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Solicitation details

Solicitation numberDARPA-SS-27-01
Notice ID4da5bb67e9a641dfb676e165fe44d9f6
AgencyDepartment of Defense (DoD)
Sub-agencyDefense Advanced Research Projects Agency (DARPA)
Contracting officeDEF ADVANCED RESEARCH PROJECTS AGCY
NAICS code541715 — Research and Development in the Physical, Engineering, and Life Sciences (Except Nanotechnology and Biotechnology)
Product / service code (PSC)AC11
Set-asideUnrestricted (full and open)
Notice typeSources Sought
Posted23 October 2026
Response deadline23 November 2026
CompetitionCompetitive

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Description

The Defense Advanced Research Projects Agency (DARPA) Defense Sciences Office (DSO) is requesting information on the current state of the art and technological limitations of solid-state direct thermal-to-electric energy conversion technologies. We define solid state energy conversion as systems that convert a temperature differential directly into electrical energy without utilizing mechanical moving parts (e.g., pistons, turbines, or rotary alternators). This RFI seeks to identify the best possible solid state heat engine performance across a wide operating temperature range, factors that limit performance, and the most attractive use cases if these highly efficient solid state heat engines could be made today. This survey of limits, challenges and use cases will identify opportunities for research and development to inform potential program(s) in this area.

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Market context: DoD and NAICS 541715

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