Solar Loans vs. Leases vs. PPAs: The Numbers Side by Side (2026 Guide)

Updated for the post-Section 25D market — because the rules changed, and so did the math.

Key Takeaways

• Section 25D expired December 31, 2025, eliminating the 30% federal tax credit for homeowners who buy solar outright — a seismic shift that reshapes every financing comparison.
• Third-party ownership (TPO) now dominates, capturing a record 69% of all residential solar installations in 2026, largely because leasing companies and PPA providers can still claim federal incentives through Section 48E.
• Solar loan APRs have surged to 7.75% in early 2026 (up from just 1.5% in early 2024), and hidden dealer fees averaging 22% of system cost can quietly add ~$5,700 to your principal.
• Cash buyers in high-incentive states still win long-term: 25-year net savings top $45,000 in Massachusetts, versus ~$22,000 under a PPA.
• Prepaid leases and credit union HELOCs are emerging as hybrid strategies that capture TPO tax benefits while minimizing financing costs.

Why 2026 Changed Everything

For a decade, the math on residential solar financing tilted firmly toward ownership. Buy the system with cash or a low-rate loan, claim the 30% federal Investment Tax Credit (ITC) under Section 25D, and watch your payback clock tick down to 6–8 years. That playbook is over.

The Section 25D residential solar tax credit officially expired on December 31, 2025. For homeowners signing contracts in 2026, there is no federal tax credit to claim — unless you go through a third-party provider. Leasing companies and PPA operators can still harvest the Section 48E commercial ITC, and the IRS has even sweetened the deal with a 10% Domestic Content Bonus that large aggregators are uniquely positioned to claim.

"The financial math has fundamentally changed; in the 2026 market, the choice isn't just about ownership, it's about who is best positioned to harvest federal incentives that individuals can no longer claim on their own," says Troy Roble, Senior Vice President of Business Development at Palmetto LightReach.

That repositioning is why third-party ownership has hit record territory. But it doesn't mean leases and PPAs are automatically the right answer for you. Let's run the numbers.

Solar Loans: Higher Rates, Hidden Fees — But You Still Own It

What You're Actually Paying

Solar loans were the darling of the 2020–2023 market when specialty lenders offered teaser rates as low as 1.5% APR. Those days are gone. Median solar loan APRs reached 7.75% in early 2026, a direct consequence of the sustained high-interest-rate environment, and the underlying cost structure is more complicated than the monthly payment suggests.

Here's what most installers won't volunteer upfront: hidden dealer fees now average 22% of system cost. On a typical 10kW system priced at ~$26,000, that's approximately $5,700 added directly to your loan principal — money that disappears into the lender-installer relationship before you make a single payment. Your effective financed amount isn't $26,000; it's closer to $31,700.

The Solar Loan Math (10kW System, 2026)

| Variable | Estimate | |---|---| | System sticker price | ~$26,000 | | Average dealer fee (22%) | ~$5,700 | | Effective loan principal | ~$31,700 | | APR | 7.75% | | 20-year monthly payment | ~$260/month | | Federal ITC available | $0 (25D expired) | | Estimated 25-year net savings (high-rate state) | ~$45,000 (cash buyers) / significantly less for financed |

When Loans Still Make Sense

• You have strong credit and can qualify for a credit union HELOC at rates well below specialty solar lenders (more on this below)
• You want ownership for home resale purposes
• You're in a state with robust net metering that maximizes bill savings
• You're adding battery storage — solar-plus-storage systems under NEM 3.0 billing achieve a 7–8 year payback, versus 10+ years for solar-only

Watch out for: Dealer fee markups buried in the APR disclosure, "same-as-cash" loans that balloon if the tax credit reimbursement isn't made within 12–18 months (a product designed around a credit that no longer exists for individuals), and prepayment penalties.

Solar Leases: Predictable Payments, Someone Else's Tax Credit

How Leases Work Now

Under a solar lease, a third-party company owns the panels on your roof. You pay a fixed monthly fee — typically escalating 2–3% annually — in exchange for using the system's output. The leasing company claims Section 48E and the Domestic Content Bonus, then prices those benefits into your rate.

The rise of prepaid solar leases represents one of the most interesting 2026 trends. Homeowners pay roughly 70% of the system cost upfront — avoiding long-term interest charges — while the leasing company retains ownership, claims the federal incentives, and passes a portion of that value back through a discounted upfront price. It's a creative middle ground that's growing fast.

The Lease Math

| Variable | Estimate | |---|---| | Monthly lease payment (no escalator, 10kW) | ~$100–$140/month | | Annual escalator | 2–3% | | Total payments over 25 years | ~$42,000–$58,000 | | Maintenance responsibility | Lessor's (major advantage) | | Federal ITC benefit | Claimed by lessor, partially passed through | | 25-year net savings (vs. paying utility) | Moderate — variable by escalator and utility rate trajectory |

The "Total Home Electrification" Lease

A powerful emerging product is the Total Home Electrification lease — a single 25-year agreement bundling solar, batteries, a heat pump, and an EV charger. These products eliminate the complexity of financing multiple technologies separately and are gaining traction as utilities roll out complex time-of-use rates that reward whole-home optimization.

Advantages: Predictable payments, no maintenance headaches, no ownership responsibility, access to tax credits you can't claim yourself.

Disadvantages: You don't own the asset, which can complicate home sales. Long contract terms (20–25 years) require transfer agreements. You're betting on the lessor's longevity.

Power Purchase Agreements (PPAs): Pay Per Kilowatt-Hour, Not Per Month

How PPAs Work in 2026

A PPA is simpler in concept: you pay for the electricity your panels produce, measured in kilowatt-hours, at a contracted rate — typically 10–20% below your current utility rate. The PPA provider owns the system, claims the incentives, and charges you only for what you use.

"PPAs have evolved from a subprime financing tool into a strategic hedge against grid volatility, especially as utilities move toward complex time-of-use rate structures," notes Chris Collins, Founder of Ohm Analytics.

The Solar-as-a-Service evolution is particularly notable: providers are bundling maintenance, battery replacements, and system monitoring into a single per-kWh rate. As California data shows — where 67% of new solar installations in 2025 included battery storage — storage is increasingly non-negotiable, and PPA structures that include battery replacement remove a significant long-term risk for homeowners.

The PPA Math

| Variable | Estimate | |---|---| | PPA rate (10kW system, 2026) | ~$0.08–$0.12/kWh | | Annual escalator | 2–3% | | Year 1 annual payment (10,000 kWh) | ~$800–$1,200 | | 25-year net savings vs. utility (Massachusetts) | ~$22,000 | | Maintenance responsibility | PPA provider | | Federal ITC benefit | Claimed by provider |

The savings gap is real and significant: $45,000 (cash purchase) vs. $22,000 (PPA) over 25 years in a high-rate state like Massachusetts. But that $45,000 figure assumes you had ~$26,000 in cash available and no federal credit to claim — a narrower pool of homeowners than it used to be.

The Smart Alternatives: Credit Union HELOCs and Hybrid Products

Two strategies are quietly disrupting the traditional financing trichotomy:

• Credit Union HELOCs: By financing solar through a home equity line of credit from a credit union, homeowners can access rates of 5–6.5% APR and completely sidestep the 20–35% dealer fees charged by specialty solar lenders. The interest may also be tax-deductible. The catch: you need sufficient home equity and the discipline to manage a revolving credit product.

• Post-25D Hybrid Loans: Major financiers like GoodLeap and Sunnova have launched hybrid loan products specifically designed for the post-25D market, structuring monthly payments to mirror TPO savings without requiring a tax credit reimbursement. These are worth evaluating carefully — compare the total cost of financing against a straight HELOC before signing.

Side-by-Side Comparison: 10kW System, 25-Year Horizon

| Factor | Cash Purchase | Solar Loan (7.75%) | Lease | PPA | |---|---|---|---|---| | Upfront cost | ~$26,000 | $0–$2,000 | $0 (or ~$18K prepaid) | $0 | | Federal incentive | None (25D expired) | None | Claimed by lessor ✓ | Claimed by provider ✓ | | Monthly payment | $0 | ~$260 | ~$100–$140 | Usage-based | | Ownership | Yes | Yes | No | No | | Maintenance responsibility | Yours | Yours | Provider | Provider | | 25-year net savings (MA) | ~$45,000 | Significantly lower | Moderate | ~$22,000 | | Best for | Cash-rich buyers in strong net metering states | Credit-qualified with HELOC access | Low-hassle, budget-conscious | High usage, TOU-rate households |

Bottom Line

The expiration of Section 25D didn't kill solar — it fundamentally redistributed who benefits most from going solar and how. For cash-rich homeowners in strong net-metering markets, ownership still delivers superior long-term returns. For the majority of Americans who don't have $26,000 available and who can no longer claim a federal tax credit, third-party ownership through a well-structured lease or PPA has moved from a compromise to a genuinely competitive option — especially as Solar-as-a-Service bundles eliminate maintenance risk and storage replacement uncertainty. Whatever path you're considering, the single most powerful thing you can do right now is get multiple proposals and compare the total 25-year cost, not just the monthly payment.

Get a free, no-obligation solar proposal today and see exactly which financing option puts the most money back in your pocket over the life of the system.