How to read a solar contract before you buy the house

When a home has solar, the panels are the easy part. The document that comes with them — a loan, a lease, a power-purchase agreement, or nothing at all — is what actually determines your monthly cost, your obligations, and whether the system is an asset or a liability. Yet solar agreements are routinely handed over as a stack of PDFs during a 10-day inspection window and skimmed, not read. This guide walks through the contract clause by clause so a buyer or agent can spot the terms that matter before signing, and there's a printable checklist at the end.

Step 1: Identify which kind of agreement you're looking at

Everything downstream depends on this. There are four possibilities:

• Owned outright (cash). No ongoing agreement. Focus shifts to warranties, permits, and any lingering lien.
• Solar loan. The homeowner owns the system but owes a lender. You're checking the payoff, the lien, and whether the loan is being paid off at closing or assumed.
• Lease. A third party owns the panels; you'd pay a fixed monthly amount to use them. You must qualify to assume it.
• Power Purchase Agreement (PPA). A third party owns the panels; you'd pay per kilowatt-hour produced, usually with an annual escalator.

Not sure which one applies? Our guide on finding the solar financing before you make an offer shows how to determine this early.

Step 2: The clauses that matter — and what to look for

The escalator

Leases and PPAs almost always raise the payment each year, commonly 1.9–2.9%. Find the escalator rate and do the math on what the payment becomes in years 10, 15, and 20. A 2.9% escalator nearly doubles the payment over a 25-year term. A rising solar payment that outpaces local utility inflation is a real cost the buyer inherits.

Transfer / assignment terms

This is the clause that makes or breaks the deal. Does the agreement allow transfer to a new homeowner? Does the buyer have to meet a credit score minimum? Is there a transfer fee? How long does the servicer take to approve? Start this process the moment the home goes under contract — especially if the original company has been through bankruptcy and servicing moved to a successor.

Buyout / payoff schedule

Most leases and PPAs include a schedule showing the cost to purchase the system outright at various points. Compare the buyout figure to what the system is actually worth — early-term buyouts are often higher than the equipment's value. For a loan, get the exact payoff in writing from the current servicer.

Production guarantee

Many leases and PPAs promise a minimum annual output and compensate the owner if the system underproduces. Check whether the guarantee transfers to you, how a shortfall is measured, and how a claim is made — particularly if the company that issued it no longer exists.

Early termination and damage/removal

Look for what happens if you need the panels removed (for a roof replacement, say) or if you want out early. Removal-and-reinstall costs and early-termination penalties can be substantial, and they're easy to miss until you need them.

End-of-term options

At the end of a lease or PPA, you typically choose to buy the system, renew, or have it removed. Know which options exist and at what cost — a buyer inheriting the final years of an agreement needs this.

Lien / UCC language

The agreement often references a UCC-1 fixture filing securing the equipment. Confirm it exists, who holds it, and how it's cleared or transferred at closing. See our UCC lien guide.

Warranty assignment

For an owned system, check whether the installer's workmanship warranty transfers to a subsequent owner and for how long. Manufacturer warranties on panels and inverters usually stay with the equipment regardless.

Step 3: Red flags that warrant a closer look

• An escalator at the high end (2.9%+) on a long remaining term.
• A transfer clause with strict credit requirements or a large fee.
• An early-term buyout that exceeds the system's realistic value.
• A production guarantee backed by a company that has since gone bankrupt.
• References to an SREC assignment — the certificates may not convey. See who owns the SRECs.
• Any mention of a lien or filing you can't locate in title.

Printable checklist

For the full transaction picture, pair this with our complete guide to solar leases at closing.

Sources & further reading

• U.S. Dept. of Energy — Solar leasing and power purchase agreements

General information, not legal advice. Solar agreements vary widely — have a qualified attorney review your specific contract before signing.