Solar financing changed meaningfully when Section 25D expired. In 2025, that 30% federal credit only went to buyers — not lessees — which made cash purchases and loans clearly superior to leases. In 2026, with the credit gone, the four main financing paths (cash, loan, lease, PPA) are closer in net value than they've been in a decade, and the right choice depends on your time horizon, capital position, and state incentives.
Disclaimer: All financing terms and rates are representative estimates based on industry data as of 2026. Actual loan rates, lease terms, and PPA rates vary by installer, lender, and credit score. Get competing offers before signing anything.
Key Takeaways
- Cash purchases deliver the best ROI but require $22,500–$31,500 upfront (LBNL Tracking the Sun, 2024) — solar loans offer similar returns with $0 down
- Solar loan APRs typically run 6–9%; a $25,000 loan at 7% over 15 years adds ~$15,500 in total interest
- Leases and PPAs cost $0 upfront but forfeit ownership and state tax credits — best suited for time horizons under 8 years
Why the Financing Decision Matters More in 2026
With Section 25D gone, there's no federal incentive that automatically rewards buyers over lessees. But that doesn't mean all four financing paths are equal — it just means the differences are now driven by state programs, your personal tax situation, and how long you plan to own the home.
The key split remains ownership. When you buy (cash or loan), you own the system and capture any state tax credits directly. When you lease or sign a PPA, the installer owns the system and captures the federal Section 48E commercial credit — you don't see that benefit directly, though it typically flows through as a lower rate or payment.
According to LBNL's Tracking the Sun 2024 report, roughly 35% of residential solar in 2025 was financed through third-party ownership (leases and PPAs). That share dropped significantly after 2019 when loan products improved — and may shift again in 2026 as buyers weigh options without the 25D advantage.
Option 1: Cash Purchase
Paying cash eliminates financing cost entirely. You own the system from day one, collect all savings from avoided electricity costs, and — if your state has a tax credit — you claim the full amount.
Pros:
- Highest long-term ROI (no interest cost)
- Eligible for all state tax credits
- System adds to home value immediately
- No contract obligations
Cons:
- Requires $22,000–$35,000 in available capital
- Opportunity cost of that capital (could earn 4–5% in a money market fund)
Best for: Homeowners with liquid capital who plan to stay in the home 10+ years and live in a state with an active tax credit program (New York, Hawaii, Oregon, Massachusetts).
Option 2: Solar Loan
Solar loans have become the dominant residential financing path. They let you own the system with $0 or low down payment, capture state tax credits, and pay off the balance over 5–20 years while your electricity savings offset the monthly payment.
Typical rates in 2026 run 6–9% APR through solar-specific lenders like GreenSky, Mosaic, and Dividend Finance. Your credit score is the biggest rate determinant — borrowers above 720 typically qualify for sub-7% rates.
| Loan Amount | Rate (APR) | Term | Monthly Payment | Total Interest |
|---|---|---|---|---|
| $25,000 | 6% | 15 years | $211 | $12,980 |
| $25,000 | 7% | 15 years | $225 | $15,500 |
| $25,000 | 8% | 10 years | $303 | $11,360 |
| $30,000 | 7% | 20 years | $233 | $25,920 |
The critical question: does your monthly electricity savings exceed your loan payment? At a $211 monthly payment and average savings of $150–$180/month, you're cash-flow negative in the early years. But the system payoff period (full investment recovered) is still well within the 25-year panel lifespan.
Pros:
- $0 or low down payment
- You own the system and capture state credits
- Fixed rate — insulates you from electricity rate increases
- No Section 25D disadvantage vs. 2025 since the credit is gone for everyone
Cons:
- Total cost of ownership higher than cash due to interest
- Monthly loan payment may exceed early electricity savings
- Loan appears on credit report; can affect debt-to-income for mortgage refinancing
Option 3: Solar Lease
A solar lease is a long-term rental agreement, typically 20–25 years. You pay a fixed monthly amount to use the system; the installer owns, operates, and maintains it. Monthly lease payments typically run $80–$200 depending on system size and location.
The installer owns the system and claims the Section 48E commercial investment tax credit — saving them 30% on their cost. That benefit is supposed to flow through as a lower lease rate, though how much actually flows through varies by installer.
Pros:
- $0 upfront
- No maintenance responsibility
- Predictable monthly cost
- Easy to qualify (credit requirements lower than loans)
Cons:
- You don't own the system — no state tax credits
- Lease complicates home sales (must transfer or buy out)
- No system appreciation or property value benefit
- 20–25 year commitment
- Escalator clauses in some leases increase payments 1–3%/year
Best for: Homeowners who plan to sell within 5–8 years, have limited capital, or live in states with no state tax credit program where the ownership advantage is minimal.
Option 4: Power Purchase Agreement (PPA)
A PPA works like a lease but you pay per kilowatt-hour instead of a flat monthly rate. You pay $0.08–$0.15/kWh for the electricity your panels produce — typically 15–25% below your utility rate.
The installer owns the system, claims Section 48E, and sells you electricity below market rate. If your utility rate rises and the PPA rate doesn't (many contracts have fixed or capped escalators), your effective savings increase over time.
| Financing Type | Upfront Cost | You Own System? | State Tax Credits? | Maintenance | Avg. Payback |
|---|---|---|---|---|---|
| Cash | Full price | Yes | Yes | Owner | 8–13 years |
| Solar Loan | $0–low | Yes | Yes | Owner | 10–15 years |
| Lease | $0 | No | No | Installer | N/A (never own) |
| PPA | $0 | No | No | Installer | N/A (never own) |
How to Compare Offers Side by Side
When you're comparing a loan offer against a lease or PPA, you need a common metric. Use net lifetime savings over 25 years:
- Loan/Cash: (Year 1 electricity savings × 25 years × 1.04/year escalator) − Total loan cost − Inverter replacement (~$2,000 in year 12) + Home value premium at sale
- Lease/PPA: (Utility rate savings over lease term) − Total lease payments
Any offer that doesn't let you model this math is hiding something. Use our Solar Lease vs Buy Calculator to run the comparison with your actual numbers.
Bottom Line
In 2026, cash and solar loans remain the better long-term financial path if you own the home for 10+ years — especially in states with active tax credit programs. Leases and PPAs make sense when capital is constrained, your time horizon is shorter, or you're in a state where the ownership advantage is minimal.
Whatever you choose, get competing offers. Multiple lenders compete for solar loan business; use that. And don't let an installer walk you through only their preferred financing product — understand all four options before you sign.
See Is Solar Worth It in 2026? for the full payback analysis by state, and Solar Panel Cost by State for current installed price benchmarks in your state.
Related Guides
- Home Solar Panels: The Complete 2026 Guide — Full overview of solar costs, sizing, brands, installation, and maintenance.
- Solar Panel Cost by State in 2026 — What you'll actually pay installed in your state, with every active state incentive.
- Is Solar Worth It in 2026? — State-by-state payback analysis to determine whether solar makes financial sense for your home.
- Solar ROI Calculator — Model your payback period with your electricity rate, system size, and financing type.
