Prepaid Solar Lease vs Loan in Arizona: Which Option Costs Less Over 25 Years?

A prepaid solar lease on a $35,000 system costs about $24,500 upfront. A solar loan for that same system at 6.99% APR over 20 years costs $65,074 by the time you make that last payment. The gap is $40,574. For Phoenix homeowners who have the upfront cash, the prepaid lease is the lower total-cost path. Whether a loan makes more sense comes down to one thing: whether that lump sum is actually available to you.

This post walks through the real numbers on the prepaid solar lease vs loan in Arizona debate, explains why the 30% discount survives even after the federal ownership credit expired, and covers what homeowners across the Valley are actually seeing on their bills.

How does a prepaid solar lease vs loan in Arizona compare in total dollars?

A prepaid solar lease costs less over the life of the system, and the reason is straightforward: it eliminates interest entirely. A $35,000 solar loan at 6.99% APR financed over 20 years runs $271 a month. By the time that loan is paid off, you have handed over $65,074 for a system that was priced at $35,000. That $30,074 in interest is the cost of spreading payments out over time.

The prepaid lease works differently. The leasing company owns the system, claims the Section 48E commercial investment tax credit, and passes those savings directly to the customer. The same $35,000 system costs roughly $24,500 through a prepaid lease, which is about 30% off the standard retail price. You pay once, the system is installed, and from that point forward there are no monthly lease payments and no interest charges accumulating over two decades.

Over 25 years, that difference compounds. With a loan, you pay $65,074 during the first 20 years and nothing after. With a prepaid lease, you pay $24,500 once. The prepaid option costs $40,574 less in total outlay.

What does a solar loan really cost an Arizona homeowner over 20 years?

Solar loans have become easy to get and simple to understand, which can obscure how much they actually cost. The sticker price of a system and the total cost of financing it are two very different numbers.

Take a typical Phoenix residential installation: a 10 to 12 kilowatt system sized to handle a summer APS bill running $250 to $300 a month. That system lands around $30,000 to $38,000 installed. At $35,000 financed through a 20-year solar loan at 6.99% APR, the monthly payment is $271. That is a manageable figure, but over 240 payments, the total paid is $65,074.

The interest load matters even more when you factor in that APS residential rates currently average $0.128 per kilowatt-hour and SRP's basic residential rate sits around $0.110 per kilowatt-hour. Both utilities adjust rates periodically. If rates increase by even 2% per year, the bill savings from solar grow over time, but those savings are partially offset by the interest you are paying on the loan during the same period. The homeowner who financed still comes out ahead of not having solar, but significantly behind the homeowner who prepaid.

This is the conversation most solar sales reps skip: they show you the monthly loan payment, point out it is less than your current utility bill, and call it savings. It is technically accurate. But over 20 years, you are paying $30,074 more than the system was worth at installation.

How much does a prepaid solar lease in Arizona cost vs a loan?

A prepaid solar lease in Arizona typically runs about 30% below the market price of an equivalent owned system, because the leasing company captures the Section 48E commercial investment tax credit and passes it through. For a $35,000 system, that translates to roughly $24,500 upfront.

There are no monthly payments after that. No interest. No balloon at the end. The solar panels generate power, your APS or SRP bill drops, and the cost structure is fixed from day one.

On a per-kilowatt-hour basis, Phoenix is one of the best places in the country to run that math. The city averages 6.5 to 7.5 peak sun hours per day, which is among the highest in the United States. A 10-kilowatt system here generates roughly 1,400 to 1,500 kilowatt-hours per month during peak summer, compared to 900 to 1,100 in a cloudier climate. More production per panel means faster bill reduction and a shorter effective payback on that upfront payment.

For homeowners who want to compare the full economics before deciding, the numbers above give a starting framework. The specifics depend on your system size, your actual utility, and your roof orientation, but the structure of the comparison stays the same.

Does the federal solar tax credit still apply to a prepaid lease in Arizona?

This is where things get confusing, and it is worth being precise. The Section 25D residential solar tax credit, the one that gave homeowners who bought or financed a system a 30% federal credit, expired for systems placed in service after December 31, 2025. If you buy or take a loan on a solar system in 2026 or later, you do not receive that credit. That is a meaningful change for anyone who was counting on it to offset the loan balance.

The prepaid lease takes a different legal path. Because the leasing company owns the system, not the homeowner, the leasing company claims the Section 48E commercial investment tax credit instead. That credit runs through 2027. The leasing company can then pass the savings on to customers through lower pricing, which is how the 30% discount reaches the homeowner without the homeowner needing to claim anything on their own return.

This means anyone who missed the window for the residential tax credit on an owned system can still access the equivalent 30% discount by choosing the prepaid lease. The mechanism is different. The result is similar.

Note that this is general information about how these products work and not tax advice. Your specific situation depends on factors only a qualified tax professional can evaluate.

If you want to understand how this fits with your APS or SRP rate plan and current net billing rules, the Arizona net billing post covers how exported power is credited under the current system.

How Phoenix Valley homeowners are weighing the choice

Across the Phoenix metro, the prepaid solar lease vs loan in Arizona conversation plays out differently depending on neighborhood, utility territory, and how long someone plans to stay in the home.

What are homeowners in Phoenix and Scottsdale actually choosing?

In Phoenix and Scottsdale, where summer bills on APS service often run $300 to $400 a month for a 2,000 to 2,500 square foot home, the break-even math on a prepaid lease is typically under eight years. That means anyone planning to stay in the home for at least a decade comes out ahead. The loan can still make sense for homeowners who do not have $24,000 in liquid cash, but the interest cost is real and worth running against expected bill savings before signing.

Scottsdale rooftops tend to face favorable south and west orientations, and the city's strict HOA rules around appearance do not extend to prohibiting solar. Under Arizona's A.R.S. 33-1816, HOAs can set reasonable aesthetic guidelines but cannot prevent installation. That protection holds whether you own the system or lease it.

What about Mesa, Chandler, and Gilbert homeowners comparing solar financing?

Mesa, Chandler, and Gilbert sit largely in SRP territory, though utility assignment depends on neighborhood, not city. SRP's basic residential rate is around $0.110 per kilowatt-hour with a $20 monthly service charge. At those rates, a 10-kilowatt system covering 80 to 90% of a typical household's usage saves roughly $100 to $130 per month before accounting for the service charge. That is $1,200 to $1,560 per year in direct bill reduction.

The financing structure you choose does not change how much power the panels produce, but it changes what you net. With a loan at $271 per month, you are saving $100 to $130 on your bill and spending $271 on the loan payment. The monthly cash flow is negative during the loan term. With the prepaid lease, after the upfront payment, the monthly savings go entirely to your pocket. For SRP homeowners who pay attention to net billing export rates, this distinction becomes more important as the value of exported power continues to shift.

What do Glendale, Peoria, and West Valley homeowners need to know about solar financing?

Glendale, Peoria, Surprise, and the broader West Valley have seen rapid population growth, which has brought both APS and SRP expansion. Depending on your address, you may be on either utility. The financing comparison works the same way regardless of which utility serves you, but the actual bill savings vary based on your rate plan and how much power you currently use. Homeowners in newer construction with better insulation often use less power, which means smaller systems and lower upfront costs for the prepaid lease.

Solar energy savings in Phoenix's West Valley also benefit from the same 6.5 to 7.5 peak sun hours that make the entire metro one of the strongest solar markets in the country. That production advantage holds across all financing structures.

For a broader look at what solar installation involves from start to finish, the residential solar installation guide covers the process regardless of which financing path you choose.

How does a solar broker help you compare prepaid lease vs loan options in Arizona?

Getting competing bids is the part of this process most homeowners skip, and it is often where the biggest money is left on the table. The price of a solar system, and therefore the size of both a loan and a prepaid lease payment, depends heavily on which installer quotes the work. Two bids on the same roof can vary by $5,000 to $8,000, which changes the math on every financing option.

Phoenix Valley Solar works as a solar broker in Arizona, not as an installer. That means the role is to gather competing bids from vetted local installers, lay out the pricing side by side, and let the homeowner make an informed choice. The broker model removes the conflict of interest that comes with a salesperson who only represents one company's products and financing terms.

For homeowners who are comparing prepaid lease vs loan options, having bids from multiple installers also makes the comparison more accurate. A loan on a lower-priced system from a different installer might end up costing less than a prepaid lease on a higher-priced system from the first company that came to the door.

If you want to understand how the broker process works and why it tends to produce better outcomes than cold-calling installers directly, the solar broker vs direct installer post explains the difference in detail.

You can also get competing quotes through the contact page or use the Solar Calculator to run your own numbers before having any conversations with installers.

Is a prepaid solar lease vs loan in Arizona the right call for your situation?

The prepaid solar lease is the lower total-cost option for Phoenix homeowners who can pay upfront. The math is not close: $24,500 versus $65,074 over 20 years. That $40,574 gap does not disappear if rates change or the system underperforms. It is a fixed difference in how much you spent.

The loan makes sense when the upfront cash is not available, and even then, the monthly loan payment is typically less than the monthly utility bill it replaces. Reducing your electric bill in Arizona through solar, even with a loan, usually beats doing nothing.

The key is to make the comparison with real numbers for your specific home and actual competing bids, not with estimates from a single salesperson's spreadsheet. Read more about Phoenix Valley Solar and how the broker process works on the About page. When you are ready to see what the numbers look like for your address, the Solar Calculator or the contact page are the right starting points.

Residential solar in Arizona is not going to get cheaper as APS and SRP rates continue their upward trend. The sooner the comparison gets made with real data, the more useful it is.

Frequently Asked Questions

Is a prepaid solar lease cheaper than a solar loan in Arizona?

Yes, significantly. A $35,000 system financed at 6.99% over 20 years costs $65,074 total. The same system as a prepaid lease runs about $24,500 after the 30% discount. Over 25 years, the prepaid option costs roughly $40,574 less in total outlay.

Can I still get 30% off solar in Arizona if the federal tax credit expired?

Yes. The Section 25D residential credit expired after 2025 for owned systems, but prepaid leases let the leasing company claim the Section 48E commercial credit through 2027 and pass that 30% savings to you. Consult a tax professional for advice specific to your situation.

How much does a prepaid solar lease cost in Arizona?

For a typical Phoenix residential system priced around $35,000, a prepaid lease runs approximately $24,500 upfront after the 30% discount. The exact cost depends on system size, roof complexity, and which installer is used. Getting competing bids is the best way to confirm your actual price.

What is the monthly payment on a $35,000 solar loan in Arizona?

At 6.99% APR over 20 years, a $35,000 solar loan costs about $271 per month. Total payments over the loan term reach $65,074, meaning you pay $30,074 in interest above the original system price.

How many peak sun hours does Phoenix get for solar?

Phoenix averages 6.5 to 7.5 peak sun hours per day, among the highest in the United States. This means solar systems here produce significantly more power per panel than in most other parts of the country, improving the payback on any solar financing option.

Does a prepaid solar lease affect my APS or SRP bill the same way as owning solar?

Yes. The panels produce power that reduces what you draw from the grid, lowering your APS or SRP bill regardless of whether you own or lease the system. Arizona's current net billing rules apply to exported power under either ownership structure.