Under federal hazardous waste law, the owner who generates end-of-life solar panels can stay responsible for them long after the truck leaves. Comstock Metals closes that loop with R2v3 Appendix G-audited, RIOS zero-landfill recycling, and a Certificate of Recycling / Certificate of Destruction for every project.
If you own, operate, or manage solar panels, this page is written for you. In solar, end of life (EOL) is the point when a panel leaves service for good. That can mean decommissioning an entire array, repowering a site, replacing modules damaged by hail or storms, returning panels under warranty, or discarding modules damaged during shipping or installation. Whatever the reason, someone has to decide what happens to the panels next, and under federal law, that responsibility usually lands on the owner.
When a solar panel is retired, replaced, or removed from service. It is the moment a panel becomes waste you have to manage.
The developer, utility, independent power producer, commercial or industrial owner, or anyone else who holds the decommissioning obligation for a solar site.
The legal term for whoever creates the waste. For retired panels, that is typically the project owner or the operations and maintenance (O&M) contractor working for them.
Deciding whether a batch of panels is hazardous or non-hazardous waste. It determines how the panels can be shipped, who can receive them, and what records you must keep.
The Resource Conservation and Recovery Act (RCRA), the federal hazardous waste law, makes the generator of a hazardous waste responsible for it from generation to final disposal. If retired panels are hazardous and mismanaged downstream, the problem can be traced back to the project owner. That responsibility cannot be transferred to a hauler or recycler.
EPA notes heavy metals like lead and cadmium "may be leachable at such concentrations that waste panels would fail the toxicity characteristic leaching procedure," the test RCRA requires to determine whether a material is hazardous waste. EPA also says, "Some solar panels may pass the TCLP while others fail."
Panel design drives the outcome. A mixed fleet of crystalline-silicon and thin-film (e.g., cadmium telluride) modules can't be assumed safe; each technology requires its own determination.
Without documented chain-of-custody recycling and a Certificate of Recycling / Certificate of Destruction, owners face audit exposure, ESG reporting gaps, and possible regulatory penalties, even if they believe the panels were recycled.
R2v3 is a responsible-recycling standard managed by Sustainable Electronics Recycling International (SERI). Appendix G, added in January 2024, is written specifically for photovoltaic modules, so a recycler certified under it has been independently audited on how it handles solar panels, not electronics in general. Read more in our R2v3 guide.
The Recycling Industry Operating Standard (RIOS) covers a facility's quality, environmental, and safety management systems and is typically certified alongside R2v3. Comstock Metals holds R2v3 Appendices A, E, and G and RIOS 2016 certifications. See our compliance page for details.
“True recycling is defined by how effectively an operator converts end-of-life panels into materials that are safe and viable for reintroduction into the domestic supply chain while eliminating long-term liability for panel owners.”
Rules depend on where your panels are. Some apply nationwide, two states have solar-specific rules, and most states fall back on their standard waste rules. Use the table to find your starting point, then confirm details with the End-of-Life Panel Navigator, our free state-by-state tool.
| Jurisdiction | Rule/program | Requirements and status | Learn more |
|---|---|---|---|
| Not state-specific: federal rules that apply to every project | |||
| Federal (United States) | Resource Conservation and Recovery Act (RCRA), the federal law for hazardous waste (Subtitle C) and non-hazardous solid waste (Subtitle D). The U.S. Environmental Protection Agency (EPA) oversees it, and most states run their own EPA-authorized programs. | In effect. Retired panels have no separate federal category. The owner (the generator) determines whether each batch is hazardous, typically using the Toxicity Characteristic Leaching Procedure (TCLP) to assess leachable metals. Hazardous batches ship on a manifest to a permitted facility. Pending: EPA says it "is developing a proposed rule" to add solar panels to the universal waste regulations. Not final. | EPA: End-of-Life Solar Panels 40 CFR Part 261 (hazardous waste identification) 40 CFR Part 273 (universal waste) |
| Federal, adopted state by state | 2018 Transfer-Based Exclusion, part of the Definition of Solid Waste rule (40 Code of Federal Regulations (CFR) 261.4). | In effect, federally, since May 30, 2018. Material sent to a qualified reclaimer may be excluded from the definition of solid waste if the generator exercises due diligence and maintains records. States opt in: Mississippi has, New York has not. | EPA: 2018 Definition of Solid Waste rule |
| Federal, vacated; some states still list it | 2015 Verified Recycler Exclusion (EPA's 2015 Definition of Solid Waste rule). | Vacated federally in 2017 and replaced by the 2018 rule. Some states, including Arizona and Illinois, still carry it. Ask any recycler which exclusion it relies on, and ask for proof. | EPA: 2018 Definition of Solid Waste rule (includes the 2015 history) |
| State-specific: the two states with solar panel universal waste rules | |||
| California | Universal waste designation for photovoltaic (PV) modules. The California Department of Toxic Substances Control (DTSC) administers it under Title 22 of the California Code of Regulations, Division 4.5, Chapter 23. Authority comes from Health and Safety Code section 25259 (Senate Bill 489). | In effect since Jan 1, 2021. Qualifying panels can be managed as universal waste: handlers notify DTSC, label containers "Universal Waste–PV Modules," store up to one year, and keep records. Larger handlers file an annual report each February. Comstock Metals' Hanford facility has DTSC approval. | DTSC: PV module universal waste regulations Comstock: CA universal waste guide California page |
| Hawaii | Universal waste category for solar panels. The Hawaii Department of Health, Solid and Hazardous Waste Branch (SHWB) administers it under Hawaii Administrative Rules (HAR) Chapter 11-273.1, "Standards for Universal Waste Management." | In effect since 2021. Streamlined universal waste standards replace full hazardous waste rules, and a January 2024 amendment lets handlers remove frames without a permit so the metal can be recycled locally. California and Hawaii are the only states with this classification. | Hawaii DOH: hazardous waste rules HAR Chapter 11-273.1 (PDF) |
| States with no solar-specific rules | |||
| All other states | Standard hazardous and solid waste rules are run by each state's environmental agency. Examples: the Arizona Department of Environmental Quality, the Mississippi Department of Environmental Quality, and the New York State Department of Environmental Conservation (DEC). | No solar-specific rule. Panels fall under the state's version of RCRA, so the owner still classifies each batch and keeps records. New York's DEC is considering adding solar panels to its universal waste rule. | End-of-Life Panel Navigator Texas page · Florida page |
Counties and towns often set their own permit, zoning, and decommissioning conditions on top of state rules, and land leases can add removal terms. For example, some Arizona counties impose decommissioning and financial assurance conditions through zoning, and many New York towns follow NYSERDA's model solar law, which requires a decommissioning plan and a surety bond. Check your site's permits and lease alongside the table above. This table is a starting point, not legal advice. Rules change, so confirm current requirements with the agency or your counsel.
| Criteria | Cheap hauler/landfill/broker | Comstock Metals |
|---|---|---|
| Final destination | Landfill, stockpile, or unknown | Zero landfill; all received panels recycled |
| Hazardous waste risk | May violate rules if panels fail TCLP | R2v3 Appendix G-audited and RIOS-certified process |
| Downstream chain | Unaudited; may be passed along | Every downstream vendor is regularly audited |
| Resale/export | Panels may be resold or exported; the owner stays traceable | We don't resell, repair or broker panels |
| Documentation | None you can defend in an audit | Certificate of Recycling / Certificate of Destruction + chain of custody |
| Scope | Pickup only | Decommissioning, logistics, site services, and recycling |
Every project closes with a Certificate of Recycling / Certificate of Destruction certifying that all panels we received were recycled, with zero material sent to landfill. Recovered materials (aluminum flakes, glass pearls, and metal tailings) are audited to R2v3 Appendix G standards.
A complete certificate lists the generating entity and recycling facility, the panel manufacturer, model, and weight, separate received and processed dates, recovery by material and downstream end use, a zero-landfill statement, R2v3 Appendix G and RIOS certifications, and authorized signatures with completion and issuance dates. Our guide to what should actually be in a Certificate of Recycling explains each element.
SAMPLE PLACEHOLDER
Replace with redacted real certificate
Generator · Facility · Panel make, model and weight · Dates · Recovery by material · Signature
Start with the four requests in our guide to vetting a solar panel recycler, then close the gaps only owners can. The second list covers liability blind spots a vendor checklist usually misses.
Tell us about your site, and we'll scope the recycling, logistics, and documentation.
Generators remain responsible for their waste after panels leave the site, and that responsibility cannot be transferred to a hauler or recycler. An itemized certificate provides verifiable evidence if the material is later traced to improper disposal and supports ESG reporting. See the certificate guide for what to look for.
Look for R2v3 certification scoped to Appendix G and covering the facility that will receive your panels, RIOS certification for the same facility, and a way to verify each certificate directly with the certifying body. Our vetting guide lists the four records to request before you sign.
Not necessarily. Depending on the design and materials, some panels pass the TCLP while others fail. See how the TCLP test works.
Under RCRA's cradle-to-grave framework, generators of hazardous waste remain responsible for it. Documented, certified recycling is how you show proper management. Our key questions for your recycler help you test a vendor's answers.
Yes. Comstock Metals can recycle any panel, regardless of type or condition, including storm-damaged and broken modules. See our Waste Acceptance Policy (PDF) for details.
It may streamline handling, but the EPA says it is still developing a proposed rule to add solar panels to the federal universal waste regulations. Good documentation protects you either way. Compare today's rules with the End-of-Life Panel Navigator.
More questions? Browse our full solar recycling FAQ.
Tell us about your project, and we'll send a recycling or decommissioning quote with full compliance documentation, including a Certificate of Recycling / Certificate of Destruction.
