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

Canonical: https://abierto.us/opportunities/darpass2701

- Solicitation number: DARPA-SS-27-01
- Notice type: Sources sought
- Status: Open. Offers due November 23, 2026
- Department: Department of Defense
- Agency: Defense Advanced Research Projects Agency
- Contracting office: Def Advanced Research Projects Agcy (HR0011)
- NAICS: 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
- Product or service code: AC11 National Defense R&D Services; Department Of Defense - Military; Basic Research
- Who can bid, by location: Anywhere in the US. Location does not limit who can bid: a product shipped to the buyer, research at the performer's facility, or work at the contractor's site. A state shown is the delivery point.
- First posted: October 23, 2026
- Last posted: October 23, 2026
- SAM.gov: https://sam.gov/workspace/contract/opp/4da5bb67e9a641dfb676e165fe44d9f6/view

## 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.

## Attachments

- [DARPA-SS-27-01.pdf](https://sam.gov/api/prod/opps/v3/opportunities/resources/files/23176f7a87824a969e8ef5398f5ae5fd/download)

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125 open in NAICS 541715.

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## Publications

- October 23, 2026: Sources sought, due November 23, 2026. Notice 4da5bb67e9a641dfb676e165fe44d9f6. https://sam.gov/workspace/contract/opp/4da5bb67e9a641dfb676e165fe44d9f6/view

## Points of contact

- BAA Coordinator, DARPA-SS-27-01@darpa.mil

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Source: SAM.gov Contract Opportunities bulk extract. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/darpass2701.