Solar leases and Power Purchase Agreements (PPAs) look nearly identical from the outside — both offer $0 down, both are 20-year contracts where the installer owns the system, and both replace some or all of your utility bill. The difference that matters is how your payment is calculated: a lease bills you a fixed monthly amount regardless of what the panels produce, while a PPA bills you per kilowatt-hour actually generated. That structural difference shifts risk in ways that matter depending on where you live and how your utility rates move.
Here's the breakdown for 2026.
Disclaimer: Solar lease and PPA terms vary significantly by company and state. Numbers here are illustrative based on 2026 market data. Section 25D residential solar credits expired December 31, 2025. Section 48E applies to the installer, not homeowners under either structure. Always get 3+ installer quotes before deciding.
Key Takeaways
- Lease: fixed monthly payment regardless of production; you bear production risk
- PPA: pay per kWh produced, typically $0.08–$0.12/kWh vs. national utility average of $0.20–$0.28/kWh in 2026
- Section 48E is claimed by the installer under both structures; savings pass through as lower rates
- Both include annual escalators — PPA rate escalators compound the same way lease escalators do
- Neither lets you claim the residential solar credit (Section 25D, expired) or own the system
The Core Difference: Fixed Payment vs Per-kWh Payment
Under a solar lease, you agree to pay a fixed monthly amount — say $120 — for use of the solar system on your roof. Whether the system produces 9,000 kWh or 7,000 kWh in a given year, your payment stays the same. If the panels underperform (shading, equipment degradation, a cloudy year), that's partly your problem: you're still paying $120/month while buying more grid electricity to compensate for the shortfall.
Under a PPA, you agree to buy all electricity the solar system produces at a set rate — say $0.10/kWh. If the system produces 9,000 kWh, you pay $900. If it produces 7,000 kWh, you pay $700. The PPA installer has more incentive to keep the system performing well, because their revenue depends on production.
| Solar Lease | Power Purchase Agreement | |
|---|---|---|
| Payment structure | Fixed monthly ($80–$150/mo typical) | Per kWh produced ($0.08–$0.12/kWh typical) |
| Who bears production shortfall risk? | You (fixed payment regardless) | Installer (lower production = lower revenue) |
| Annual escalator | Fixed monthly payment increases ~2.9%/yr | Per-kWh rate increases ~2–3%/yr |
| Who owns the panels? | Installer | Installer |
| Section 48E claimed by | Installer | Installer |
| Home sale complexity | Requires transfer or buyout | Requires transfer or buyout |
PPA Pricing vs. Your Utility Rate
The PPA value proposition is that you're buying solar electricity at a rate below what your utility charges. In 2026, the national average residential electricity rate is roughly $0.20–$0.28/kWh depending on your state (Hawaii and California are higher; Louisiana and Wyoming are lower). A PPA at $0.10/kWh represents meaningful savings — roughly 50–60% off the utility rate for many homeowners.
The catch is the escalator. PPA rates typically increase 2–3% annually. Over 20 years, a $0.10/kWh starting PPA rate becomes approximately $0.16–$0.18/kWh by year 20. Whether that still beats your utility rate depends on where utility prices go. If utilities raise rates faster than the PPA escalator (historically common), the PPA continues to look good. If utility rates drop — uncommon but possible with grid decarbonization lowering wholesale costs — the PPA can become a bad deal.
| Year | PPA Rate (2.5% escalator) | Illustrative Utility Rate ($0.22/kWh, 3%/yr) | Annual PPA Savings (7,000 kWh) |
|---|---|---|---|
| Year 1 | $0.100/kWh | $0.220/kWh | $840 |
| Year 5 | $0.110/kWh | $0.255/kWh | $1,015 |
| Year 10 | $0.128/kWh | $0.296/kWh | $1,176 |
| Year 20 | $0.163/kWh | $0.397/kWh | $1,638 |
This is the optimistic scenario where utility rates keep rising. In a flat-rate scenario, the savings shrink in later years. Use the Solar Lease vs Buy Calculator to model your specific utility rate trajectory.
When a PPA Is Better Than a Lease
The PPA structure is generally more favorable when:
Your roof has shading or production uncertainty. If neighboring trees, a chimney, or a difficult roof orientation means your system might underperform the original production estimate, you want to pay based on what the system actually generates — not a fixed monthly amount based on what it was projected to generate. The PPA puts production risk on the installer.
Your utility rate is high and rising. States like California ($0.35+/kWh in many territories), Hawaii, New York, and Massachusetts have high enough utility rates that even a PPA with a modest escalator represents significant long-term savings.
You want to start savings-positive from day one. Because a PPA charges you per kWh produced, your month-one net cost is simply: (PPA kWh × PPA rate) + remaining grid electricity. If the PPA rate is well below the utility rate, you're saving from the first bill.
When a Lease Is Better Than a PPA
Your utility rate is moderate and stable. If you're paying $0.14–$0.18/kWh and your utility has a history of modest, predictable rate increases, a lease's fixed payment structure gives you predictable monthly budgeting without the per-kWh variability.
Your system is on a high-confidence, unshaded south-facing roof. If the installer's production estimate is reliable, the risk of paying a fixed amount while the system underperforms is low. In that case, the simplicity of a fixed monthly payment can be appealing.
The lease rate is lower than available PPA rates. In some markets, the effective cost-per-kWh under a lease (total annual payment ÷ estimated annual production) comes out lower than the PPA rate being offered. Always calculate the effective rate on both structures before comparing.
Both Structures and Section 48E
Under both a solar lease and a PPA, the installer owns the solar system on your roof. That means the installer — not you — is eligible for the Section 48E investment tax credit, which applies to commercial and third-party-owned solar systems through 2027. Section 48E replaced Section 48 and applies to systems installed in 2026 onward.
You, as the homeowner and occupant, do not receive a federal tax credit under either structure. The Section 25D residential credit (which required ownership) expired December 31, 2025. If an installer tells you that you'll receive a 30% federal credit under a lease or PPA, that's incorrect — Section 25D requires ownership of the system.
What you do benefit from is the installer's Section 48E credit being reflected in the rates they offer. A 30% federal credit on a $24,500 system represents $7,350 that reduces the installer's cost basis, some portion of which competitive market pressure passes through to your rate.
The Comparison You Need to Run
Before choosing between a PPA and a lease — or between either and an owned system — run the actual 20-year numbers. The Solar Lease vs Buy Calculator lets you input your utility rate, proposed PPA rate or lease payment, escalator, and estimated production to see which path wins over your planning horizon.
You'll also want to factor in the Solar ROI Calculator numbers if you're comparing against a cash purchase or solar loan — owned systems eliminate the ongoing payment entirely after payback.
Bottom Line
A PPA's per-kWh payment structure is better for homeowners who want production-aligned billing and have some uncertainty about their system's output. A lease's fixed payment is simpler to budget around and can make sense when production risk is low. Both structures involve the same ownership situation, the same home-sale complications, and the same Section 48E dynamic — the installer benefits, you benefit through lower rates. The decision between them is mostly about how you want production risk allocated.
Related Guides
- Solar Lease Fine Print Guide 2026 — The escalator clause, home sale complications, and insurance gaps decoded.
- Solar Panel Financing Guide 2026 — Full comparison of cash, loan, lease, and PPA over 20 years.
- Is Solar Worth It in 2026? — The full ROI picture without the expired federal credit.
- Net Metering Guide 2026 — How net metering interacts with lease and PPA structures by state.
