Solar Financing Options in Arizona: Loans, Leases, and PPAs
Arizona homeowners and businesses pursuing solar installations typically encounter three distinct financing structures: solar loans, solar leases, and power purchase agreements (PPAs). Each structure distributes ownership, risk, tax benefit eligibility, and long-term cost differently. Understanding these classifications is essential before evaluating any specific offer, and the choice made at the financing stage affects permitting, utility interconnection, and incentive access for the life of the system.
Definition and Scope
Solar financing in Arizona divides into two ownership categories: customer-owned and third-party-owned systems.
Customer-owned systems are funded through cash purchases or solar loans. The property owner holds legal title to the equipment, files for the federal Investment Tax Credit (ITC) — set at 30% of installed system cost under the Inflation Reduction Act of 2022 (IRS Form 5695, IRC §25D) — and claims the Arizona residential solar income tax credit of up to $1,000 (Arizona Revised Statutes §43-1090).
Third-party-owned systems are governed by lease or PPA contracts. A solar company retains equipment title; the property owner either pays a fixed monthly lease payment or purchases electricity at a contracted per-kilowatt-hour rate. Under third-party ownership, the installer — not the property owner — claims federal and applicable state tax incentives.
Scope and geographic coverage: This page addresses financing structures available to Arizona residents and commercial entities subject to Arizona state law and utility tariffs administered by the Arizona Corporation Commission (ACC). It does not address financing mechanisms exclusive to California, Nevada, or other states. Federal tax credit rules apply nationwide and are not Arizona-specific; the IRS governs those provisions. Commercial financing structures subject to SEC securities regulations fall outside this page's scope.
For a broader orientation to how Arizona solar systems function, see the conceptual overview of Arizona solar energy systems, and for regulatory framing applicable to all financing decisions, see the regulatory context for Arizona solar energy systems.
How It Works
Solar Loans
A solar loan functions like a home improvement loan or a secured home equity product. The borrower draws funds to pay the installer in full at project completion, then repays the lender over a term typically ranging from 5 to 25 years. Interest rates vary by product type:
- Unsecured solar loans carry no lien on the property; approval depends on creditworthiness, and rates are generally higher than secured products.
- Home equity loans and HELOCs use the home as collateral; interest may be tax-deductible under IRS guidelines depending on loan use.
- Contractor-originated loan products are facilitated at point of sale through third-party lenders; dealer fees embedded in these products can increase the effective cost of capital.
The Arizona Department of Financial Institutions (AZDFI) licenses consumer lenders operating in the state. Loan-financed systems are owned by the customer, making them eligible for the 30% federal ITC and the Arizona $1,000 residential tax credit.
Solar Leases
Under a lease, a third-party owner installs and maintains the equipment. The customer pays a fixed monthly fee — independent of actual energy production — for a contract term commonly set at 20 or 25 years. Lease agreements typically include an annual payment escalator, often between 1% and 3% per year, which affects total cost over the contract's life.
Because the lessor owns the system, the customer does not claim the federal ITC or depreciation benefits. Lease transfers at home sale require buyer qualification and lessor approval, which can complicate real estate transactions.
Power Purchase Agreements (PPAs)
A PPA differs from a lease in that the customer pays per kilowatt-hour of electricity generated rather than a flat monthly fee. The contracted PPA rate is typically set below the prevailing utility retail rate at contract signing. Like leases, PPAs involve third-party ownership.
Arizona's regulatory framework for PPAs has historically been influenced by ACC interpretations of utility service definitions. Property owners considering PPAs should review current ACC docket decisions, as the regulatory treatment of third-party solar sales has been subject to ongoing commission proceedings.
Common Scenarios
- Full cash purchase — Highest upfront cost, maximum long-term savings, full tax credit eligibility, no lender or lessor involvement.
- Solar loan (unsecured) — No home lien, federal ITC claimed by owner, monthly loan payment replaces utility bill reduction; net savings depend on loan rate vs. energy cost offset.
- Solar loan (secured/HELOC) — Lower interest rate than unsecured products; home used as collateral; ITC claimed by owner.
- Solar lease — No upfront cost, predictable fixed payment, no tax credit eligibility for customer, lessor responsible for maintenance.
- PPA — No upfront cost, per-kWh billing, rate typically below utility tariff at contract start; long-term rate depends on escalator terms.
Arizona's major utilities — Arizona Public Service (APS) and Salt River Project (SRP) — each administer distinct net metering and export compensation tariffs that affect the economic return of any financing structure. The utility interconnection application must be completed regardless of ownership model, as outlined in the Arizona utility interconnection process.
Decision Boundaries
The table below contrasts the three primary structures across key decision factors:
| Factor | Customer-Owned (Loan/Cash) | Lease | PPA |
|---|---|---|---|
| Federal ITC (30%) eligibility | Customer | Third-party owner | Third-party owner |
| Arizona $1,000 tax credit | Customer | Third-party owner | Third-party owner |
| Monthly payment type | Loan amortization | Fixed lease fee | Per-kWh rate |
| Maintenance responsibility | Owner | Lessor | Provider |
| Home sale complexity | Simple transfer | Lease assignment required | PPA assignment required |
| System ownership at end of term | Owner | Buyout option or removal | Buyout option or removal |
For property owners with sufficient tax liability to absorb the 30% ITC, customer-owned financing delivers the largest total economic return over a 25-year period, assuming the loan rate is below the offset value of electricity generated. Third-party structures eliminate upfront costs and equipment risk but forgo all ownership-based incentives.
Permitting obligations are not affected by financing structure: all grid-tied systems in Arizona require municipal building permits and ACC-jurisdictional utility interconnection approval regardless of who owns the equipment. More detail on permitting processes is available at the Arizona solar energy systems home.
For residential versus commercial financing distinctions — which carry different depreciation schedules, MACRS applicability, and financing product eligibility — see residential solar vs. commercial solar in Arizona and commercial solar incentives in Arizona.
Low-income households may qualify for grant-based or subsidized financing programs that fall outside the loan/lease/PPA taxonomy; these are addressed separately at Arizona low-income solar programs and access.
References
- Arizona Corporation Commission (ACC) — regulatory authority over utility tariffs and third-party solar service agreements in Arizona
- Arizona Department of Financial Institutions (AZDFI) — licensing authority for consumer lenders in Arizona
- IRS Form 5695 — Residential Energy Credits — federal residential solar tax credit (IRC §25D)
- IRS Publication 946 — How To Depreciate Property — MACRS depreciation applicable to commercial solar assets
- Arizona Revised Statutes §43-1090 — Arizona residential solar income tax credit
- U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy — Solar Financing — federal overview of solar financing structures
- Database of State Incentives for Renewables & Efficiency (DSIRE) — Arizona — state-level incentive and financing program registry