USDA REAP Solar Grant 2026: New Rules for Installers
If you sell solar to farms or rural businesses, the USDA REAP grant 2026 rules change how those conversations go. The new REAP rules for the Rural Energy for America Program (REAP) also tighten REAP grant eligibility and add sourcing rules that affect most module supply chains. Here's what the 2026 REAP grant requirements mean for your past customers, your proposals, and your project files.
So what changed? Under USDA's new rules, solar projects must be complete, with 12 months of documented production, before the owner applies for a REAP solar grant. Grants cover up to 25% of eligible project costs, with a $500,000 maximum for renewable energy systems, and new limits apply to equipment origin, cropland sites, and project configurations.
Status as of October 8, 2026: The rule has an effective date of October 16, 2026. USDA's October 2 announcement says an application window will follow, but no deadline has been set yet.
Working on a farm or rural commercial solar project? GreenLancer delivers commercial plan sets and PE-stamped solar engineering with licensed engineers in all 50 states.
What Changed Under the 2026 USDA REAP Final Rule?
USDA published the REAP final rule on October 1, 2026. USDA calls the new approach a post-completion, performance-validated model. Awards are based on actual production, costs, and system performance instead of projections.
Old vs. New REAP Rules
Here is how the 2026 rule compares with the program most installers know.
Requirement | Previous Program | 2026 Final Rule |
Application timing | Apply before project completion | Apply 12 to 24 months after the Project Period ends |
Performance data | Projected production | 12 months of actual production plus 12 months of prior energy use |
Grant share | Up to 50% for qualifying IRA-funded awards | Up to 25% of eligible costs |
Maximum RES grant | $1,000,000 | $500,000 |
Ground-mount solar on cropland | Deprioritized under August 2025 guidance | Ineligible |
Foreign adversary components | Deprioritized under August 2025 guidance | Ineligible, roof-mount or ground-mount |
Project locations | Multi-location projects allowed | One location per application |
Competition | State and national competitions | Top state picks, then national rank order |
Applications per year | One RES and one EEI application | One application per federal fiscal year |
What Solar Installers Should Do Now
You don't need to wait for the application window to get moving. Start with these four steps.
☐ Review completed farm and rural commercial projects that may fall within the first window's 36-month lookback
☐ Contact those customers about pre-installation utility bills, production records, and business eligibility
☐ Check equipment origin, site classification, and contractor documentation for each project
☐ Update proposals so project financing doesn't depend on winning an award
Key REAP Dates for Installers
Put these dates on your calendar.
October 1, 2026: Final rule published
October 16, 2026: Effective date
November 2, 2026: Deadline to submit comments on the REAP rule (docket RBS-26-Business-0529)
To be announced: Notice of Funding Opportunity (NOFO) with application windows and funding amounts
USDA issued the final rule with a public comment period ending November 2, 2026. The rule takes effect October 16, before the comment period closes. Feedback could shape future guidance or rulemaking.
Can Previously Installed Solar Projects Qualify for REAP?
Yes, and this is the biggest near-term opportunity for installers. The first application window under the new rules reaches further back than later windows will.
The First Window's 36-Month Lookback
Normally, the Project Period must end 12 to 24 months before the application date. For the first application window only, that range stretches to 12 to 36 months.
The Project Period starts when the first allowable cost is incurred and can't exceed 24 months. It ends no later than 30 days after the system is installed.
That end date isn't tied to PTO. A slow utility approval won't shift the Project Period, but it does delay the start of the 12 months of production data the application needs.
Larger projects face more timing pressure. Long commercial solar interconnection timelines can push a 24-month Project Period to its limit.
What Happens to Previously Submitted REAP Applications?
Customers who applied under the old rules generally fall into three groups.
Signed Form 1940-1 before October 16, 2026: USDA keeps processing the application if the project stays consistent with its terms.
Previously unsuccessful applications: The customer can submit a new application if the project meets the new requirements.
Other pending or halted applications: The customer should confirm the status with their USDA Rural Development state office.
USDA says the build-first structure lets applicants with pending applications resubmit if they meet program requirements. Many of those customers already have operating systems.
Past Customer Screening Checklist for REAP
Use this list to decide which past customers deserve a closer look. It flags good candidates but doesn't confirm eligibility.
☐ Project Period ended within the first window's 12 to 36-month range
☐ Customer meets the applicant ownership, financial, and eligibility rules
☐ 12 months of post-installation production data available
☐ 12 consecutive months of pre-installation energy use records available
☐ Array isn't ground-mount on certified cropland
☐ System serves business loads, not a residence, and has a dedicated meter
☐ Equipment meets the foreign adversary rules or qualifies for the pre-publication exception
☐ Installer was licensed in the state and had at least three similar installations
☐ Records show how the customer selected contractors
☐ Invoices, permits, interconnection records, and equipment specs are on file
Utility Bills and Production Data
Applications need 12 consecutive months of energy use from before installation and 12 months of actual production after it. Help customers pull utility bills now, since account history gets harder to retrieve over time.
Don't rely on net-metered utility bills for production data. Those bills show net usage, not total PV generation, because on-site consumption never crosses the meter.
Instead, confirm the monitoring platform can export monthly kWh generation for a full 12 months. This matters most on older projects where monitoring access changed hands or an inverter was replaced.
Who Qualifies for USDA REAP Solar Grants in 2026?
REAP grant eligibility tightened at both the applicant level and the project level. Before you pitch REAP to a customer, check both.
REAP Applicant Requirements Checklist
Applicants still need to be agricultural producers or rural small businesses. The definitions just got stricter.
☐ Agricultural producer or rural small business, with the project located in a rural area
☐ Highest-Level Owner, meaning no other entity owns or controls the applicant
☐ Rural small businesses meet Small Business Administration size standards
☐ Existing business at least 12 months before the Project Period starts
☐ Site owned or controlled by lease at least 12 months before the Project Period
☐ Current ratio of at least 1:1 (current assets to current liabilities)
☐ Positive cash flow in the most recent fiscal year
☐ Active SAM registration with a Unique Entity Identifier
☐ No other REAP award in the same federal fiscal year
☐ Any foreign ownership disclosed by name and percentage
The one-award rule reaches further than it looks. If two people own a farm LLC, USDA won't make another award that year to any other company or sole proprietorship they own.
Ground-Mounted Solar vs. Barn and Rooftop Solar
The rule bars ground-mount solar and wind on certified cropland, as defined by FSA's cropland definition. Rooftop arrays on barns, shops, and other ag buildings fall outside that ban.
Ground-mount solar and wind projects must also document historical energy use commensurate with the system. Every REAP applicant, roof-mount or ground-mount, must provide historical consumption and actual production data to support the required energy and payback calculations.
Roof-mount on an ag building with its own load: Potentially eligible
Ground-mount on certified cropland: Ineligible
Ground-mount on non-cropland with commensurate historical usage: Potentially eligible
Ground-mount without commensurate historical usage: Ineligible
Farmhouses and Residential Loads
REAP dropped the provision that let residences share a meter with the project. Projects now need dedicated metering, and installing a dedicated meter is an allowable cost.
A separate meter doesn't make a farmhouse array eligible, though. Residential use stays ineligible, with narrow exceptions for community solar subscriptions, nursing homes, assisted living facilities, and qualifying for-profit hotels.
Ineligible REAP Projects, Including EV Chargers
Several project types are now off the table. EVC installers should note that electric vehicles, EV chargers, and charging stations are ineligible, along with anything that dispenses energy at retail.
EV chargers and charging stations
Flexible fuel pumps
Retrofits that add storage to an existing renewable energy system
Stand-alone energy storage
Projects at more than one location
Distribution-only projects, such as biogas pipelines
Trailer-mounted solar and battery systems
Energy efficiency improvements for new building construction
Mobile systems get a narrow carve-out. Solar on a food truck that powers its refrigeration can qualify, but a solar trailer can't.
How Much Is the REAP Solar Grant in 2026?
The REAP solar grant got smaller. Applicants must cover at least 75% of project costs, which limits the grant to 25%.
Maximum requests are $500,000 for renewable energy systems and $250,000 for energy efficiency improvements, with a $1,500 minimum. Reaching the $500,000 cap takes at least $2 million in eligible costs.
REAP Grant Example for a Solar Project
Here's what a mid-size farm project looks like under the new math.
Example Solar Project | Amount |
Eligible project cost | $400,000 |
Maximum grant at 25% | $100,000 |
Required non-grant share | $300,000 |
The grant isn't guaranteed, and the customer pays for the full system before applying. Build that into every REAP conversation.
Allowable vs. Unallowable REAP Costs
Allowable costs must relate directly to the project, be incurred as part of installation, and be integral to its operation. That's why a project's total invoice and its REAP-eligible cost often differ.
Allowable | Unallowable |
Engineering fees | Feasibility studies |
Construction permit and license fees | Cost of preparing the grant application |
Fees required by an interconnection agreement | Operations and maintenance |
Architectural fees | Extended warranties |
Dedicated meter installation | Monthly meter fees and perimeter fencing |
Resource assessments | Costs incurred outside the Project Period |
Keep invoices dated and itemized. If USDA can't tell what share of costs is unallowable, the application can be ruled ineligible.
REAP Grants vs. REAP Guaranteed Loans
USDA points applicants to REAP guaranteed loans to cover upfront costs. A customer can get a guaranteed loan and a grant for the same project, but combined funding is capped at 75% of project costs.
Guaranteed loans have their own sourcing rules. USDA's 2025 guaranteed loan guidance on component origin says all PV system components must come from countries not named as foreign adversaries.
REAP Solar Panel and Equipment Country of Origin Requirements
This rule is the one most likely to knock out an otherwise strong project. Solar PV and wind systems with any component made in a country named as a foreign adversary are ineligible, whether roof-mount or ground-mount.
The rule relies on the federal list of foreign adversary countries, which includes China. Since much of the global solar supply chain runs through China, sourcing records now matter as much as spec sheets.
Which Solar Components Need Country of Origin Documentation?
Applicants must identify the country of origin for every system component. For solar PV, USDA's examples include:
Solar panel manufacturer
Inverter manufacturer
Racking manufacturer
Monitoring software
Country of manufacture isn't the same as headquarters location, so document where each component was made rather than where the brand is based. The rule doesn't fully spell out how USDA treats upstream materials and subcomponents, so watch for guidance.
Start collecting these records for every farm and rural commercial job:
☐ Manufacturer and model number for each major component
☐ Country of manufacture, based on supplier documentation
☐ Country of origin letters from your distributor or manufacturer
☐ Records of any equipment substitutions after design
☐ Installation dates that tie the equipment to the project
Are Solar Projects Installed Before October 1, 2026, Exempt?
Partly. Systems installed before the rule's October 1, 2026, publication date are exempt from the foreign adversary component restriction. This gives the market time to move to components from other countries.
The exemption covers the component rule only. These projects still have to meet every other requirement, including the cropland, residential, and timing rules.
Borderline cases need clarification from USDA. If a system was installed before October 1 but inspection, commissioning, or PTO came later, document each date carefully.
REAP vs. FEOC: The REAP foreign adversary rule is a separate test from tax credit sourcing. FEOC rules for solar tax credits focus on prohibited foreign entities and material assistance cost ratios, so a project can pass one test and fail the other.
How Installers Should Change Solar Proposals and Project Design
Build-first shifts the risk to your customer. Your proposals, designs, and recordkeeping should reflect that from day one.
Financing Solar Projects Before a REAP Award
A customer won't see grant money until well after the system runs for a year. Adjust your sales approach accordingly.
How Does USDA Calculate REAP Solar Payback?
USDA uses its own simple payback formula, separate from your customer's financial model. For a renewable energy system, it works like this:
Simple Payback = Project Cost ÷ Annual Dollar Value of Energy
The value of energy replaced is based on the customer's actual average price paid, documented by 12 consecutive months of pre-installation utility bills. Under the new rule, the calculation uses actual values instead of projections.
Simple payback must be equal to or less than the system's Agency-approved useful life, or the project is ineligible. It also factors into scoring, so accurate billing and production records directly affect competitiveness.
Solar and Battery Sizing Requirements
Oversized systems are a real liability under the new rule. For solar-plus-storage projects, USDA sets these limits:
Annual production can't exceed 120% of the applicant's prior 12-month consumption, or the utility's limit if lower
Energy storage can't exceed 100% of the size of the paired renewable energy system
The rule doesn't spell out how USDA compares storage size to generation size. Avoid assuming a kWh-to-kW conversion, and confirm the method with your USDA Rural Development state office before designing to the limit.
Right-sizing starts before the sale. A solar feasibility study helps match system size to load during planning, even though its cost isn't eligible for REAP grant funding.
Solar Installer Qualifications and Contractor Selection
REAP treats every contractor and consultant on a project as a Key Service Provider. That includes developers, general contractors, electricians, professional engineers, and consultants.
The installing contractor must:
Be licensed in the state where the system was installed
Have installed at least three systems similar to the project
Have no conflict of interest with the applicant
Key Service Providers must also be selected through procedures that meet federal procurement standards in 2 CFR 200.318 through 200.327. Applications must include information on every Key Service Provider.
For completed projects, ask whether the customer documented how they chose you. Competing bids, quotes, and emails can help.
REAP Conflict of Interest Rules
The rule requires arm's length transactions and lists examples of conflicts. Several involve the developer writing the application, conducting the feasibility study, providing financing, or installing the system.
How "developer" applies to a typical installer isn't fully clear yet. Confirm your role with USDA or a qualified REAP professional before helping with an application.
Solar Project Records to Keep for REAP
Some documents are REAP requirements. Others are supporting records that make an application easier to back up.
Required or directly requested by REAP:
☐ 12 consecutive months of pre-installation energy use
☐ 12 months of actual production data from the completed system
☐ A resource assessment, or a feasibility study in its place, covering the solar resource and expected energy output
☐ Simple payback data
☐ Itemized, dated invoices within the Project Period
☐ Country of origin for all system components
☐ Key Service Provider information
☐ Business financial statements, plus two years of pro forma financials for projects of $200,000 or more
☐ PE completion certificate for projects of $200,000 or more
Supporting project records:
☐ Approved permit plan sets that follow commercial solar plan set requirements
☐ As-built drawings and revised equipment schedules
☐ PE-stamped structural and electrical documents
☐ Final permits and inspection approvals
☐ Interconnection agreement and PTO letter
When Does REAP Require a PE Completion Certificate?
For projects costing $200,000 or more, and for larger or more complex projects, USDA requires a completion certificate from a professional engineer. The engineer must be licensed in the state where the project was completed, and the certificate is a condition of the award.
This certificate is separate from the PE stamp on a permit plan set. The engineer who provides it also counts as a Key Service Provider, so the qualification and conflict of interest rules apply.
Consistent plan sets, equipment schedules, and engineering records make every later step easier to document. GreenLancer delivers commercial solar plan sets and engineering services for ag and rural commercial projects nationwide.
When Can Customers Apply for REAP Grants?
The rule sets the framework, but applications open only after USDA publishes a NOFO. That notice will set application windows, available funding, and scoring details.
How USDA Will Select REAP Awards
USDA now uses state-based initial selections followed by national ranking. Applications are scored on a 100-point scale, with a minimum qualifying score of 40 points. USDA will score applications on a 100-point scale, and anything below 40 points won't be funded.
Requests of $20,000 or less compete for a reserved funding pool first
USDA then selects the top-scoring application from each state, or the top two when more than $100 million is available
Remaining funds go to applications in national rank order
USDA also plans an online application portal. Watch for details in the NOFO.
The REAP Lawsuit
On September 28, 2026, farm and solar groups filed a federal lawsuit challenging USDA's REAP changes. It targets earlier USDA actions, including the halt on pending applications.
The lawsuit came before the final rule, but plaintiffs' attorneys say their arguments apply to it too. Litigation or new USDA guidance could still change how the rule is carried out.
Ready for your next farm or rural commercial solar project? Complete the form to get permit-ready plan sets and PE-stamped engineering from GreenLancer.
USDA REAP Grant 2026 FAQs
What Is the Deadline for USDA REAP Solar Grants in 2026?
USDA hasn't announced one yet. The new rule has an effective date of October 16, 2026, and application windows will be set in a NOFO. Solar projects must already be complete and operating for at least 12 months to apply.
What Documents Do Solar Installers Need for REAP Applications?
Key records include 12 months of pre-installation energy use, 12 months of actual production, a resource assessment or feasibility study, dated invoices, and component country of origin. Projects of $200,000 or more also need a PE completion certificate and two years of pro forma financials.
Can Farmers Get REAP Grants for Solar on Barns?
Potentially, yes. The cropland ban applies to ground-mount systems on certified cropland, not roof-mount arrays on ag buildings. The system must serve business loads, have a dedicated meter, and meet all other requirements.
Do REAP Solar Projects Require a PE Completion Certificate?
Projects costing $200,000 or more need one. USDA can also require a certificate for larger-scale or more complex projects, regardless of cost. A professional engineer licensed in the project's state must complete it as a condition of the award.
Can a Solar Project Completed in 2024 Qualify for REAP?
It depends on when the first application window opens. The Project Period end date must fall 12 to 36 months before submission in that window. Systems installed before October 1, 2026, also qualify for the foreign adversary component exemption.
Do REAP Solar Projects Need American-Made Panels?
Not necessarily. Components can't be made in a country named as a foreign adversary, but equipment from other countries can qualify. The rule covers every component, including inverters, racking, and monitoring software.
Are EV Chargers Eligible for REAP Grants?
No. The final rule lists electric vehicles, EV chargers, and charging stations as ineligible. Systems that dispense energy at retail are also excluded.
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