Solar comparison
Solar Lease vs Buy vs PPA: Which Makes the Most Financial Sense?
Compare solar ownership models: cash purchase, solar loan, lease, and PPA. See upfront cost, monthly payment, 25-year savings, ITC implications, and home resale impact.
Quick answer
What this comparison means
Cash purchase delivers the highest 25-year savings (~$22,600) because you own the system and capture all bill savings without financing costs. However, the federal residential ITC (Section 25D) expired Dec 31, 2025 — no ownership model receives it directly for 2026+ projects. Lease and PPA have zero upfront cost and the lowest monthly payment, but the installer may claim Section 48E commercial ITC (the savings may be reflected in your pricing), and total savings over 25 years drop to $3K–$10K. If you can hold the system 7+ years and want maximum savings, buying (cash or loan) is almost always better financially.
Comparison table
| Factor | Option A | Option B | Why it matters |
|---|---|---|---|
| Upfront cost | $0 or down payment (loan) | $0 (installer owns system) | Lease/PPA have no upfront cost; loan may require $0 down. |
| Monthly payment | $0 (cash) / $130–180 (loan) | $100–160 (lease) / $0.12–0.18/kWh (PPA) | Lease/PPA have predictable monthly payments; loan terms vary by APR. |
| Federal ITC (2026+) | $0 for residential (Section 25D expired) | Section 48E goes to installer, not you | Neither option gives you the ITC directly in 2026+. Lease/PPA may reflect installer's credit in pricing. |
| System ownership | You own (cash or loan) | Installer owns (lease or PPA) | Ownership affects home sale, maintenance, and upgrade flexibility. |
| 25-year net savings | ~$16K–$22K (cash/loan) | ~$3K–$10K (lease/PPA) | Buying captures 2–3x more long-term value. |
| Escalator risk | None — fixed loan payment or $0 (cash) | 2.9%/yr typical escalator | Lease/PPA escalators increase payments yearly. Ask for a 0% escalator option. |
| Home sale impact | Adds value (owned system) | Buyer must take over lease/PPA | Lease/PPA can complicate home sales. Some buyers reject the transfer. |
| Maintenance responsibility | You pay for repairs (cash/loan) | Installer covers maintenance | Lease/PPA include maintenance, but you pay a premium for it. |
| Best for | Homeowners planning 7+ years in the home with tax liability | Homeowners who want zero upfront cost and no maintenance responsibility | Your timeline and tax situation should drive the decision. |
Data Sources
This comparison uses state electricity-rate ranges, local incentive context, net-metering rules, and solar production assumptions informed by NREL PVWatts-style modeling. Final quotes, utility tariffs, and interconnection rules can materially change the economics.
Assumptions
Payback and ROI are directional estimates, not financial advice. They assume typical residential roof conditions, stable household usage, currently available incentives, and separate treatment of battery backup value, financing costs, and installer-specific add-ons.