DOE SBIR Clean Energy Grants 2026: Get Up to $1.85M
Secure up to $1.85M in clean tech R&D grants from the Department of Energy. Learn the topics, deadlines, and project pitch rules.
How much funding does the DOE SBIR program provide?
The Short Answer: The DOE SBIR/STTR program provides Phase I grants of up to $200,000 for feasibility studies (6-12 months) and Phase II grants of up to $1,650,000 (totaling up to $1.85M) for prototype development. Funding is non-dilutive and reserved for novel clean energy tech.
FSI Digital Research Brief
Verified funding decision brief
Decision summary
Founders developing solar, wind, battery, grid, or carbon capture solutions must match their project to a specific DOE subtopic and submit a Letter of Intent.
What we verified
- Letter of Intent (LOI) is a mandatory precursor to full proposal submission.
- DOE uses a strict topic-matching mechanism; unsolicited topics are not reviewed.
- TABA funding (up to $6,500 Phase I, $50,000 Phase II) is available for business development.
DOE releases SBIR/STTR topics on a fixed annual cycle (typically July/August), with standard application deadlines in October and February.
Reviewed by Ashwani K.
FSI Digital Funding Research
Last verified June 11, 2026
Official sources
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Research note 1
DOE clean tech funding is topic-driven
The Department of Energy (DOE) SBIR/STTR program funds advanced research in solar, wind, geothermal, bioenergy, energy storage, and grid modernization. DOE does not accept unsolicited energy topics. You must match your technology to a specific subtopic released in the annual solicitation and submit a Letter of Intent (LOI) to qualify for review.
- Strictly match active DOE subtopics
- Submit the mandatory Letter of Intent first
- Access up to $1.85M across Phase I and II
Research note 2
Letter of Intent and proposal deadlines
The DOE solicitation operates on two distinct annual releases. A Letter of Intent (LOI) is a mandatory precursor that must be submitted via the PAMS system. If your LOI is accepted, you have approximately 6 weeks to submit the full proposal via Grants.gov. Rushing the technical narrative or budget calculations will result in immediate disqualification.
- Submit Letter of Intent in PAMS portal
- Complete Grants.gov submission before deadline
- Confirm technical milestones with DOE program managers
Typical Applicant Profile: Clean Technology & Decarbonization Grants
Key Qualifiers
- •Measurable greenhouse gas (GHG) reduction indicators
- •Prototype validated in laboratory environment (TRL 4+)
- •Demonstrated municipal or industrial partner interest
Rejection Risk Factors
- •Early-stage concept without lab validation data
- •No quantifiable environmental impact calculations
- •Inability to provide 50% cash co-matching requirements
How Does Your Business Compare?
Clean-tech projects must demonstrate a high Technology Readiness Level (TRL) to satisfy rigorous public vetting processes. Estimate your Funding Match Score (e.g. 82/100) based on your team, location, and development activities.
Research note 3
R&D funding limits and commercial transition
DOE Phase I awards provide up to $200,000 for 6-12 months of feasibility testing. Phase II awards provide up to $1,650,000 for 2 years of prototyping. The DOE also provides up to $50,000 in TABA funding to hire commercialization advisors or patent attorneys, extending the technical runway.
- Phase I: up to $200K for feasibility
- Phase II: up to $1.65M for prototyping
- Utilize up to $50,000 in TABA commercial support
DOE Clean Energy grants
Check your DOE SBIR topic fit
Check if your renewable energy, storage, or grid modernization technology aligns with active DOE SBIR/STTR solicitation topics.
- DOE subtopic match
- Letter of Intent check
- Phase I proposal readiness
