What happens when you sell a house with solar in Illinois?

It transfers with the house, the way any fixture does — panels, inverter, and racking convey to the buyer at closing unless your sale contract says otherwise. "Owned" includes loan-financed: the loan is your debt, typically settled at closing like any other lien, and the system itself still conveys. Your job is making the transfer clean — documents, warranties, and accounts.

Clean means three things: equipment and workmanship warranties handed over with their transfer steps confirmed in writing (warranties are commonly transferable, but terms vary by manufacturer and installer); the monitoring account moved to the buyer through the platform's owner-transfer process; and the full paper trail below in the buyer's hands before their inspector asks for it. If a lender financed the system, it may hold its own UCC-1 fixture filing — the payoff at closing releases it, which the next sections cover.

Six things, assembled the week you decide to list — not the week of closing: the utility interconnection approval, every warranty with its transfer step, the monitoring account handoff, your PTAX-330 property-tax record, the Illinois Shines Disclosure Form, and — if the system is leased or on a PPA — the complete agreement itself.

• Interconnection approval / permission to operate (ComEd calls it the Certificate of Completion) — proves the system is legitimately connected and running with ComEd or Ameren.
• Equipment and workmanship warranties — with each one's transferability and transfer procedure confirmed in writing.
• Monitoring account access — the platform's owner-transfer step, so the buyer sees production from day one.
• PTAX-330 record — shows the property-tax alternate valuation is in place (more under Illinois Solar Facts).
• Illinois Shines Disclosure Form — it lists your Approved Vendor, its "If You Move" box shows the sale terms you agreed to, and its ID number lets you look the project up online; pair it with the vendor's written transfer statement from the section below.
• The complete lease or PPA agreement, if there is one — plus the company's assumption requirements and a payoff quote.

Hand the whole pack to your listing agent on day one. A buyer's lender and inspector will ask for most of it anyway — the only question is whether it arrives calmly at listing or frantically at closing.

At ComEd, yes, with one step. A buyer does not file a new net-metering application, but must send ComEd its Ownership/Name Change Form within 60 days of starting service at the home, or net metering can end on the account (the clock starts when service starts, not at closing). ComEd's form has signature lines for both you and the buyer, so sign it together at closing and hand it to the buyer. The arrangement rides with the premise, not the person. That matters most for older systems that kept full-retail netting. ComEd's FAQ says a buyer keeps that full net metering for the life of the system, unless a past owner took ComEd's generation rebate. Check your bills or ask ComEd that your account still has it, then say it out loud in the listing.

The eras in one breath: systems interconnected by December 31, 2024 that did not take the utility's generation (smart-inverter) rebate kept full-retail netting; newer systems, and older ones that took that rebate, earn supply-only credits — a meaningful difference in the monthly math, unpacked in our ComEd net metering guide. On the Ameren Illinois side, legacy status hinged on the system reaching Construction Complete in PowerClerk by the end of 2024 and runs for the 30-year life of the generator — but it can be forfeited in specific ways, covered in the Ameren guide. For the account transition itself at an Ameren home, have it confirmed with Ameren in writing before closing rather than assumed.

Then you're not selling equipment — you're transferring a contract, and there are exactly two clean exits: the buyer assumes the agreement, or you buy it out. Assumption means the buyer applies with the leasing company and takes over the payments, escalator clauses included. Buyout means requesting a payoff quote and settling it — often negotiated inside the sale itself. If the buyer won't take it over and a buyout costs too much, Illinois Shines notes you may have to pay the company to remove the system. Your Disclosure Form's "Early Termination or Completion of Contract" section shows what you would owe.

Two honest cautions. The company controls both doors: assumption approval is its call, and buyout pricing is set by the contract — nobody can promise either in advance, so request the assumption requirements and the payoff quote in writing the week you list. And escalators carry: an agreement signed years ago at a low rate can read very differently to today's buyer, which is why the full-term math in our lease vs PPA vs buying breakdown is worth sending them. Whatever you do, never let the buyer's first sight of the agreement be at the closing table.

Lenders treat leased and PPA panels as the company's property. Fannie Mae's guide says panels that are leased, or owned by a company under a power purchase agreement, are personal property and are not counted in the home's appraised value. Fannie accepts the company's "precautionary" UCC filing when it covers only the panels, not the house or land. (Fannie's rule that a UCC filing ahead of the mortgage must be moved behind it is for panels bought with a separate solar loan.) For an FHA loan, a property with a leased energy system or PPA can qualify only if the agreement does not stop the borrower from freely transferring the property. Ask the buyer's lender early. Since 2019, Illinois Shines has required its contracts to state your rights and duties when you sell the home, and for a lease or PPA, how to transfer it to the new owner. Read that part of your contract first. Contracts under the 2026-27 rules (required from June 1, 2026) must also say, if a lease or PPA is ended early, who owns the system, whether it is removed, and who repairs the roof.

A UCC-1 fixture filing is the public notice a solar financing company records against the property, flagging its interest in the equipment on the roof. Title searches surface it routinely — often to everyone's surprise — and it must be dealt with before closing wraps: released after a buyout or loan payoff, subordinated (moved behind the buyer's mortgage) if the buyer's lender requires it, or the assumption documented so the sale can proceed around it.

The mechanics by path: a buyout or loan payoff should end with the filing terminated — ask for that confirmation in writing; an assumption gets documented per the leasing company's and title company's process. Loan-financed owned systems can carry a lender's UCC-1 too, released at payoff (why a financed price can run higher: solar loan dealer fees). Your closing attorney and title company drive the specifics for your sale — this page is information, not legal advice — but the single biggest thing you control is starting the financing company's paperwork early enough for them to do their jobs.

The REC contract was never yours to hand over — under Illinois Shines it runs between the utility and the Approved Vendor, with you holding a separate agreement with that vendor. In August 2026, Illinois Shines published a home-sale guide with steps for sellers and their agents. First, read your Disclosure Form and contract, including the Disclosure Form's "If You Move" box. It lists the terms you agreed to for a sale. Then tell your Approved Vendor you are selling. The vendor may ask the buyer to sign an agreement so the system stays in the program, and to give the vendor access to the monitoring account. The vendor then reports the new owner's name and contact details to the program, which updates its records within 10 business days. No program approval is needed. Before listing, ask your vendor in writing to do this, and check it is still active with our Approved Vendor check (how the contracts work: Illinois Shines explained).

Your Disclosure Form lists your Approved Vendor on its first page. It may be a different company from the one that sold or installed your system. That's who to write to. Your Disclosure Form's ID number also lets you look the project up at the Illinois Shines project-status tool. Ask three things: whether any homeowner obligations pass to the buyer, whether anything needs re-papering at sale, and written confirmation that the system's program enrollment continues. Then hand that letter to the buyer with the rest of the pack. For context on how vendor-level these contracts are: the program's own FAQ notes that even transferring REC-contract rights from one Approved Vendor to another requires the original vendor's consent. On a lease or PPA, the company that owns the system is the project owner (the Disclosure Form calls it the Project Lessor or Project Owner), and the incentive is paid to the Approved Vendor, not to you. What passes to the buyer is the lease or PPA itself, including any Illinois Shines duties written into it.

Two more things to ask. Systems the state approved for Illinois Shines after June 1, 2026 use the 2026 REC contract. For small systems (25 kW or smaller), the utility pays the vendor half when the system turns on and the rest in equal quarterly payments over 6 years. Older small-system contracts paid it all at turn-on. If yours is a 2026 contract, ask who gets the payments still to come after the sale. And if your vendor has closed, Illinois Shines has stranded-customer resources; a new vendor does not have to honor the old contract's promises (see our solar company bankruptcy guide).

For owned systems, the research says buyers have paid a premium: Lawrence Berkeley National Laboratory's multi-state analysis found home buyers consistently paying more for houses with host-owned solar, with results varying by market. Leased systems are a different story — a separate 2017 LBNL study of California home sales found homes with third-party-owned systems selling for essentially the same as non-solar homes.

We won't put a dollar figure on it, because the numbers that circulate online trace to a 2015 dataset of 2002–2013 sales — and LBNL also observed the premium shrinking as systems age. Treat any specific premium claim as dated until proven current. The Illinois-specific value story is sturdier: under 35 ILCS 200/10-10, the owner can file a claim (Form PTAX-330) so the county assessor values the home as if it had an ordinary heating or cooling system and as it is with solar, then uses the lower value while the solar system is in use (details: solar and property tax in Illinois). Ask your county assessor whether a new owner needs to file again. Production without a property-tax bump, plus netting status ComEd has confirmed and remaining warranty years: that's the pitch a listing can actually defend.