Will your solar panels increase your home's appraised value? Possibly, but owning them does not guarantee an increase. Neither the installation cost nor projected savings tells you what buyers in your market will pay. The answer depends on your arrangement, the interest being appraised, and credible market evidence.
First find out whether you bought the equipment, financed a purchase, leased it, or agreed to buy the electricity it produces. The paperwork helps clarify what you own, what another party owns, and what questions the appraiser needs to resolve for your particular assignment.
Owned, Financed, Leased or Under a Power-Purchase Contract
Four arrangements are common in Arizona residential real estate, and they are not interchangeable.
If you purchased the panels and paid for them in full, you may own them outright. Check the purchase and ownership records rather than assuming payment alone settles every question about the equipment.
If you borrowed to buy the panels, you may own the equipment while still owing on the loan. A purchase loan is different from a lease, but the agreement and any security interest matter when establishing what is included in the property interest being valued.
If the panels are leased, a third party generally owns the equipment and you pay under a lease. The agreement determines what happens in a sale, including any transfer, assumption, buyout, or consent requirement.
Under a power-purchase agreement, a third party generally owns the equipment and you pay for the electricity produced under the agreement. Its terms, including what happens if you sell, need to be checked rather than assumed.
Financed Is Not the Same as Leased
This distinction matters for an appraisal conversation.
If you financed a purchase, you may have bought the panels and borrowed money to pay for them. That differs from paying to use third-party equipment under a lease or power-purchase agreement. Yet the word financed does not, by itself, establish title, fixture status, or how an appraiser must treat the equipment.
What the actual documents show is what an appraiser needs to understand the interest involved: the purchase agreement, loan terms, any security interest, and ownership records. How a financed system is treated in a specific assignment depends on those facts and the assignment's scope and intended use, not the purchase-versus-lease label alone.
With a lease or power-purchase agreement, ask who owns the equipment and what the agreement says about a sale. The appraiser can then consider the relevant property interest for the stated purpose without treating the contract as an automatic value increase or decrease.
What the Appraiser Is Trying to Determine
A residential appraisal answers a specific question: what is the market value of the property interest being appraised, for the purpose of the assignment?
For a system included in the real estate interest being appraised, the appraiser considers its characteristics and credible market evidence. Comparable sales and other relevant information can help show how buyers respond to a similar arrangement. Any contributory value must be supported by that analysis, not calculated from the installer's invoice.
For a financed purchase, ownership and security documents help identify what was acquired and what interest is being valued. The appraiser interprets comparable sales and other market evidence in light of those facts; not every solar-equipped sale conveys the same interest or terms.
For a lease or power-purchase agreement, the appraiser considers the relevant contract terms and the property interest in the assignment. A sale involving third-party equipment cannot simply be treated as equivalent to one conveying an owned system.
In all cases, the appraiser is forming a judgment grounded in actual evidence and the specifics of the assignment. There is no formula that produces the same solar adjustment for every home.
Why Installation Cost and Your Electric Bill Are Starting Points, Not the Answer
A solar system does not automatically add value equal to what it cost to install. Projected energy savings alone do not establish what a buyer will pay.
An appraiser examines relevant sales and other credible market evidence, including how the solar arrangement in each sale compares with yours. The evidence may be limited or mixed. That is why an appraiser needs to evaluate the actual property and market rather than apply a standard solar premium.
Installation cost and savings projections are useful context for understanding the system, but they are not a substitute for market evidence. What homeowners should expect during the appraisal process in Maricopa and Pinal Counties explains how that broader framework works for any residential assignment.
Lender Requirements Versus Private Appraisal Assignments
If you are applying for a mortgage or refinancing, your lender may require an appraisal under specific guidelines. Fannie Mae's selling guide addresses how appraisers must treat solar panels in that mortgage context based on whether they are real property fixtures, separately financed personal property, or subject to a third-party lease or power-purchase agreement, with different documentation requirements for each situation. Those rules and their distinctions are specific to mortgage lending and underwriting decisions (see B2-3-04: Special Property Eligibility Considerations and Appraising Properties with Solar Panels, both Fannie Mae mortgage-context resources).
A private residential appraisal ordered for a sale negotiation, an estate, a divorce proceeding, or a pre-listing decision is not automatically governed by those lender-specific rules. The appraiser still examines the same property-interest and ownership questions, but the scope, intended use, and applicable framework are defined by the assignment, not by mortgage underwriting standards.
If you are ordering a private appraisal, confirm the intended use at intake so the appraiser can scope the assignment correctly. That conversation is more useful than assuming lender rules apply to every situation.
Documents That Help Before You Call
Knowing which category applies is more important than gathering paperwork before you reach out. If you have documents that describe your solar arrangement, they can make the intake conversation more efficient. If you are unsure of the details, that is a reasonable starting point for the first call.
For panels you own outright, a purchase agreement or invoice, the installation permit from your county or municipality, and any manufacturer or installer warranty give the appraiser a useful picture of the system, its age, and what was installed.
For a financed system, the loan documents and original purchase agreement describe your financing arrangement and help identify the purchase and loan terms.
For a lease or power-purchase agreement, the agreement can clarify payment and transfer terms. You do not need to interpret those terms before asking TDC whether the assignment fits.
If you are unsure which arrangement you have, say so when you inquire. An existing purchase, loan, lease, or power-purchase agreement is a useful place to start.
Whether a Private Appraisal Fits Your Situation
TDC Valuations, LLC serves residential properties in Maricopa County and Northern Pinal County, Arizona. Todd Crimmins is an Arizona Certified Residential Real Estate Appraiser and has completed the Certified Green Home Appraiser program. His residential appraisal background and green-home training are relevant when a solar arrangement raises two questions: what property interest is being appraised, and what do comparable sales show about similar arrangements? The cost of the panels alone does not answer either question.
If you are considering a private appraisal for a sale, estate, divorce, or pre-listing decision, contact TDC Valuations with the property address and intended use. Put those details in the form's Additional Details field, along with anything you know about whether the panels were purchased, financed, leased, or under a power-purchase agreement. You do not need to settle the ownership question before reaching out. TDC can use your inquiry to assess whether the location and assignment fit its services and which documents would help next.