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

Notice 4da5bb67e9a641dfb676e165fe44d9f6 (solicitation DARPA-SS-27-01) from DEPT OF DEFENSE, DEF ADVANCED RESEARCH PROJECTS AGCY, posted 2026-10-23, responses due 2026-11-23T21:00:00.000Z. Status: open.

| Field | Value |
| --- | --- |
| Notice ID | 4da5bb67e9a641dfb676e165fe44d9f6 |
| Solicitation number | DARPA-SS-27-01 |
| Type | Sources Sought |
| Agency | DEPT OF DEFENSE |
| Sub-tier | DEFENSE ADVANCED RESEARCH PROJECTS AGENCY  (DARPA) |
| Office | DEF ADVANCED RESEARCH PROJECTS AGCY |
| Posted | 2026-10-23T19:17:27.000Z |
| Response deadline (UTC) | 2026-11-23T21:00:00.000Z |
| Set-aside | - |
| NAICS | 541715 |
| PSC | AC11 |
| Place of performance | - |
| Award | - |

## 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.

## Sources

- View on SAM.gov: https://sam.gov/opp/4da5bb67e9a641dfb676e165fe44d9f6/view
- Data as of 2026-11-14. Source: https://sam.gov/data-services/Contract%20Opportunities/datagov

## Cite this

"Solid-State Energy Conversion from Heat to Electricity Request for Information (RFI), SAM.gov contract opportunity 4da5bb67e9a641dfb676e165fe44d9f6." samgovapi.io, https://samgovapi.io/opportunity/4da5bb67e9a641dfb676e165fe44d9f6, data as of 2026-11-14. Primary record: https://sam.gov/opp/4da5bb67e9a641dfb676e165fe44d9f6/view

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