Closed DE-FOA-0003557 CFDA 81.135 Discretionary

Stimulate Utilization of Plentiful Energy in Rocks through High-temperature Original Technologies SBIR/STTR (SUPERHOT SBIR/STTR)

Posted by Advanced Research Projects Agency Energy

Opportunity snapshot. This Grants.gov announcement — Stimulate Utilization of Plentiful Energy in Rocks through High-temperature Original Technologies SBIR/STTR (SUPERHOT SBIR/STTR) — is cataloged under number DE-FOA-0003557 and tied to CFDA assistance listing 81.135, posted by Advanced Research Projects Agency Energy. Grants.gov currently shows the opportunity as closed, first posted on January 16, 2025 and last updated on February 6, 2026. The funding category is Discretionary, delivered as a grant.

Award economics. The award range on file is $314,363 -- $4,505,859. The agency has projected $30.0 million in total estimated funding for this announcement. It expects to issue 15 awards. If the agency funds the expected 15 awards from the $30.0 million estimated pool, the average award works out to roughly $2.0 million. Cost sharing is not required, so applicants do not need to commit matching funds to be competitive on this opportunity. Federal award ranges are often upper bounds; actual allocations reflect program appropriations, the strength of the applicant pool, and the evaluation committee's scoring.

Deadline and action path. This opportunity closed on March 5, 2026. Future funding cycles may be published under the same CFDA number, so monitoring the parent program page is the most reliable way to catch re-announcements. Every Grants.gov submission requires an active SAM.gov registration and a Unique Entity ID. Review the Eligibility section below carefully — federal eligibility categories (nonprofit, state or local government, tribal, individual, educational institution, small business) have distinct registration and reporting requirements. Pre-application outreach to the listed agency contact is permitted and often welcomed — it helps clarify scope and scoring priorities.

Award Range

$314,363 -- $4,505,859

Close Date

March 5, 2026

Posted

January 16, 2025

Est. Total Funding

$30,000,000

Expected Awards

15

Instrument

Grant

Description

This is Modification 03 to the NOFO: • Removed indirect cost cap at 15% of Total Project Costs (Section I.H.16) DE-FOA-0003557: Stimulate Utilization of Plentiful Energy in Rocks through High-temperature Original Technologies SBIR/STTR (SUPERHOT SBIR/STTR) To obtain a copy of the Notice of Funding Opportunity (NOFO) please go to ARPA-E eXCHANGE at https://arpa-e-foa.energy.gov. To apply to this NOFO, Applicants must register with and submit application materials through ARPA-E eXCHANGE (https://arpa-e-foa.energy.gov/Registration.aspx). For detailed guidance on using ARPA-E eXCHANGE, please refer to the ARPA-E eXCHANGE User Guide (https://arpa-e-foa.energy.gov/Manuals.aspx). ARPA-E will not review or consider application materials submitted through other means. For problems with ARPA-E eXCHANGE, email ExchangeHelp@hq.doe.gov (with NOFO name and number in the subject line). Questions about this NOFO? Check the Frequently Asked Questions available at http://arpa-e.energy.gov/faq. For questions that have not already been answered, email ARPA-E-CO@hq.doe.gov. Agency Overview: The Advanced Research Projects Agency – Energy (ARPA-E), an organization within the Department of Energy (DOE), is chartered by Congress in the America COMPETES Act of 2007 (P.L. 110-69), as amended by the America COMPETES Reauthorization Act of 2010 (P.L. 111-358), as further amended by the Energy Act of 2020 (P.L. 116-260): “(A) to enhance the economic and energy security of the United States through the development of energy technologies that— (i) reduce imports of energy from foreign sources; (ii) reduce energy-related emissions, including greenhouse gases; (iii) improve the energy efficiency of all economic sectors; (iv) provide transformative solutions to improve the management, clean-up, and disposal of radioactive waste and spent nuclear fuel; and (v) improve the resilience, reliability, and security of infrastructure to produce, deliver, and store energy; and (B) to ensure that the United States maintains a technological lead in developing and deploying advanced energy technologies.” ARPA-E issues this Notice of Funding Opportunity (NOFO) under its authorizing statute codified at 42 U.S.C. § 16538. The NOFO and any cooperative agreements or grants made under this NOFO are subject to 2 C.F.R. Part 200 as supplemented by 2 C.F.R. Part 910. ARPA-E funds research on, and the development of, transformative science and technology solutions to address the energy and environmental missions of the Department. The agency focuses on technologies that can be meaningfully advanced with a modest investment over a defined period of time in order to catalyze the translation from scientific discovery to early-stage technology. For the latest news and information about ARPA-E, its programs and the research projects currently supported, see: http://arpa-e.energy.gov/. ARPA-E funds transformational research. Existing energy technologies generally progress on established “learning curves” where refinements to a technology and the economies of scale that accrue as manufacturing and distribution develop drive improvements to the cost/performance metric in a gradual fashion. This continual improvement of a technology is important to its increased commercial deployment and is appropriately the focus of the private sector or the applied technology offices within DOE. In contrast, ARPA-E supports transformative research that has the potential to create fundamentally new learning curves. ARPA-E technology projects typically start with cost/performance estimates well above the level of an incumbent technology. Given the high risk inherent in these projects, many will fail to progress, but some may succeed in generating a new learning curve with a projected cost/performance metric that is significantly better than that of the incumbent technology. ARPA-E will provide support at the highest funding level only for submissions with significant technology risk, aggressive timetables, and careful management and mitigation of the associated risks. ARPA-E funds technology with the potential to be disruptive in the marketplace. The mere creation of a new learning curve does not ensure market penetration. Rather, the ultimate value of a technology is determined by the marketplace, and impactful technologies ultimately become disruptive – that is, they are widely adopted and displace existing technologies from the marketplace or create entirely new markets. ARPA-E understands that definitive proof of market disruption takes time, particularly for energy technologies. Therefore, ARPA-E funds the development of technologies that, if technically successful, have clear disruptive potential, e.g., by demonstrating capability for manufacturing at competitive cost and deployment at scale. ARPA-E funds applied research and development (R&D). The Office of Management and Budget defines “applied research” as an “original investigation undertaken in order to acquire new knowledge…directed primarily towards a specific practical aim or objective” and defines “experimental development” as “creative and systematic work, drawing on knowledge gained from research and practical experience, which is directed at producing new products or processes or improving existing products or processes.” Applicants interested in receiving financial assistance for basic research (defined by the Office of Management and Budget as “experimental or theoretical work undertaken primarily to acquire new knowledge of the underlying foundations of phenomena and observable facts”) should contact the DOE’s Office of Science (http://science.energy.gov/). Office of Science national scientific user facilities (http://science.energy.gov/user-facilities/) are open to all researchers, including ARPA-E Applicants and awardees. These facilities provide advanced tools of modern science including accelerators, colliders, supercomputers, light sources and neutron sources, as well as facilities for studying the nanoworld, the environment, and the atmosphere. Projects focused on early-stage R&D for the improvement of technology along defined roadmaps may be more appropriate for support through the DOE applied energy offices including: the Office of Energy Efficiency and Renewable Energy (http://www.eere.energy.gov/), the Office of Fossil Energy and Carbon Management (https://www.energy.gov/fecm/office-fossil-energy-and-carbon-management), the Office of Nuclear Energy (http://www.energy.gov/ne/office-nuclear-energy), and the Office of Electricity (https://www.energy.gov/oe/office-electricity). ARPA-E encourages submissions stemming from ideas that still require proof-of-concept R&D efforts as well as those for which some proof-of-concept demonstration already exists. Submissions can propose a project with the end deliverable being an extremely creative, but partial solution. Program Overview: The Stimulate Utilization of Plentiful Energy in Rocks through High-temperature Original Technologies (SUPERHOT) program aims to boost baseload power supply by enabling future power production from superhot geothermal resources, defined as temperatures greater than 375 °C and pressures greater than 22 megapascals (MPa). As the demand for power in the U.S. increases, driven by the rise in data centers and increasing electrification, superhot geothermal power can play an important role in addressing this critical need. The amount of energy in the Earth’s subsurface is immense, with estimates of at least 15,000 gigawatts (GW) of producible electricity from depths of at most 10 kilometers (km) within the U.S. alone. Unfortunately, access to this resource has been constrained by the limited extent of natural hydrothermal systems, which currently only provide about 4 GW of utility-scale power. Expansion beyond natural hydrothermal systems is now possible by recent advances in Enhanced Geothermal Systems (EGS) and in Advanced Geothermal Systems (AGS), which essentially create artificial geothermal reservoirs. The combination of highly productive superhot wells with the expanded geographic availability provided by EGS or AGS technology can accelerate the widespread development of gigawatt-scale geothermal facilities across much of the U.S., with the possibility of 10-20 GW of baseload power with a levelized cost of electricity (LCOE) less than $30 per megawatt hour (MWh) by 2040. The goal of the SUPERHOT program is to support research and development of new technologies to enable scalable superhot geothermal by addressing the major technical challenges affecting geothermal well life and the ability to harvest subsurface energy effectively. Consequently, the focus is on the following subject areas: 1) robust well construction, and 2) transfer of heat from the surrounding geologic formation to the well. To view the NOFO in its entirety, please visit https://arpa-e-foa.energy.gov.

Eligibility

23

Official Listing on Grants.gov

View full details, application forms, and submission instructions.

View on Grants.gov

Agency Contact

ARPA-E-CO <br/>ARPA-E-CO@hq.doe.gov

Key Dates

Posted January 16, 2025
Close Date March 5, 2026
Archive Date June 30, 2026
Last Updated February 6, 2026

Frequently Asked Questions

What is this grant opportunity?
This is a federal funding opportunity titled "Stimulate Utilization of Plentiful Energy in Rocks through High-temperature Original Technologies SBIR/STTR (SUPERHOT SBIR/STTR)", offered by Advanced Research Projects Agency Energy. It is associated with CFDA program 81.135. This is Modification 03 to the NOFO: • Removed indirect cost cap at 15% of Total Project Costs (Section I.H.16) DE-FOA-0003557: Stimulate Utilization of Plentiful Energy in Rocks through High-te...
Is this opportunity still open?
No, this opportunity is closed. It closed on March 5, 2026. Check the parent program page for future funding cycles.
How much funding is available?
The award range for this opportunity is $314,363 -- $4,505,859. Total estimated funding: $30,000,000. Expected number of awards: 15.
How do I apply?
Applications for federal grant opportunities are typically submitted through Grants.gov. Visit the official listing at grants.gov for application instructions, required documents, and submission deadlines.

Disclaimer: This information is sourced from Grants.gov and SAM.gov and is for informational purposes only. Opportunity details, deadlines, and eligibility requirements change frequently. Always verify current information directly on Grants.gov before applying. PlainGrants is not affiliated with any federal agency.

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