How this page is reviewed
See methodology, assumptions & sources
| Risk tier | YMYL |
|---|---|
| Author | Calculover Editorial Team Finance education |
| Editorial owner | Calculover Auto & Energy Desk Energy-economics methodology owner |
| Reviewer | Calculover Editorial Review Source and limitation review |
| Last reviewed | 2026-05-14 |
| Last verified | 2026-05-14 |
| Data effective date | 2026-05-14 |
Methodology
Solar Lease vs Buy compares purchase, loan, and lease/PPA financing for residential rooftop solar by projecting net-of-incentive cash flows over the system lifetime, applying the federal Residential Clean Energy Credit, state incentives, and lease escalator schedules where supplied.
Assumptions
- System size, kWh production, utility rate, and lease escalator are user-supplied or fall back to NREL averages.
- Federal Residential Clean Energy Credit eligibility depends on ownership; leased systems do not qualify for the homeowner.
- Resale-value impact and inverter-replacement cost are user-supplied estimates.
Limitations
- This page does not predict future utility rates, state incentives, or net-metering policy changes.
- Roof age, shading, panel-degradation curves, and installer warranty terms can materially affect outcomes.
Sources
- Homeowner’s Guide to Going Solar, U.S. Department of Energy
- Residential Clean Energy Credit, Internal Revenue Service
- Database of State Incentives for Renewables & Efficiency, DSIRE / NC Clean Energy Technology Center
Professional guidance: This page is for solar-financing education only and is not financial, tax, or contracting advice. Confirm system size, incentives, and contract terms with a licensed solar installer and tax professional.
IRC Section 25D (30% Credit) & Equipment Ownership
The financial foundation of residential solar is governed by IRC § 25D:
Under the Inflation Reduction Act, homeowners who purchase residential solar panels receive a dollar-for-dollar 30% federal tax credit against their income tax liability.
On a $24,000 8 kW installation, buying yields a $7,200 tax credit, reducing true net system cost to $16,800. When you lease, the leasing company pockets that $7,200 check from the IRS.
Worked Numeric Modeling: 8 kW System 25-Year Comparison
Consider a household consuming 11,000 kWh/year installing an 8 kW system generating $2,200 in Year 1 utility savings:
- Option 1 — Buy Solar Panels (Cash Purchase):
• Gross Installation Cost:$24,000.00
• 30% Federal Tax Credit (IRC § 25D): -$7,200.00
• Net System Cost:$16,800.00
• Payback Period ($2,200/yr savings @ 3% utility inflation): 7.0 Years
• 25-Year Cumulative Electric Bill Savings:$81,400.00
• Inverter Replacement (Year 12):-$2,500.00
• 25-Year Net Profit / Wealth Generated: +$62,100.00 Net Savings - Option 2 — Solar Lease / PPA ($0 Down, $125/mo with 2.9% Escalator):
• Year 1 Lease Payments:$1,500.00(Year 1 Utility Savings: $2,200 → Net Save: $700)
• Cumulative 25-Year Lease Payments Made: -$57,400.00
• 25-Year Cumulative Electric Bill Savings:$81,400.00
• 25-Year Net Profit / Wealth Generated: +$24,000.00 (-$38,100 Less Profit!) - The Financial Verdict:
• Purchasing solar generates +$38,100.00 MORE wealth over 25 years than signing a solar lease.
Visualizing 25-Year Net Utility Savings
The visual below contrasts the cumulative 25-year net financial savings of buying vs. leasing solar:
25-Year Cumulative Net Savings: Buy vs. Solar Lease
Comparing Net Financial Savings on an 8 kW Residential Solar System.
| Acquisition Model | 30% Federal Credit | Payback Period | 25-Year Net Savings | Home Resale Equity |
|---|---|---|---|---|
| Buy Solar (Cash / Loan) | +$7,200 (Claimed by owner) | 7.0 Years | $62,100.00 | +$15,000 to +$20,000 Equity Boost |
| Solar Lease / PPA | $0 (Developer claims credit) | Never (Ongoing lease) | $24,000.00 | $0 (Lien on home roof) |
| Difference | +$7,200 Tax Cash | Debt-Free after Yr 7 | +$38,100.00 Buyer Win | Buyer Adds Real Home Value |
Real Estate Complications: The Solar Lease Transfer Hazard
The biggest risk of solar leasing emerges during home sales:
- UCC-1 Liens and Buyer Rejection: Solar leases place a fixture filing lien against the roof. Prospective buyers must submit credit applications to assume the remaining 15–20 year lease payments.
- The Buyout Penalty: If a buyer refuses to take over the lease, the home seller is forced to pay a $15,000 to $25,000 early lease termination fee out of their home sale proceeds to close escrow.
5 Critical Mistakes Homeowners Make When Going Solar
- Signing Leases with High Annual Escalators: Agreeing to 3.5% annual lease escalators that cause solar payments to exceed regular utility bills by Year 15.
- Ignoring the 30% Tax Credit Eligibility: Taking a lease because of "$0 down" marketing when a $0-down solar loan would allow you to pocket the $7,500 tax credit.
- Leasing Solar Right Before Selling a Home: Installing a leased system 2 years before moving, scaring away homebuyers who refuse to assume the lease.
- Overpaying for Inefficient Solar Loans: Accepting 25-year solar loans with hidden 25% dealer dealer fees disguised as low interest rates.
- Failing to Verify Local Net Metering (NEM) Policies: Assuming 1:1 retail net metering in states that have transitioned to lower NEM 3.0 export rates.
In-Depth Solar & Home Energy Guides
To master solar array sizing and residential energy efficiency modeling, explore our research resources:
- The Complete Residential Solar ROI Guide: Net Metering, Payback & Tax Credits — Step-by-step financial modeling.
- EV Home Charging with Solar: Sizing Panels for Electric Vehicles — Integrate solar with home EV charging.
Recommended Energy Calculators
Primary Sources & Citations
- Internal Revenue Code. 26 U.S. Code § 25D (Residential Clean Energy Credit). Department of the Treasury.
- National Renewable Energy Laboratory (NREL). (2025). U.S. Solar Photovoltaic System and Energy Storage Cost Benchmark.
- Lawrence Berkeley National Laboratory (LBNL). (2024). Selling into the Sun: The Price Premium for Solar-Equipped Homes in the United States.
- U.S. Department of Energy (DOE). (2025). Homeowner's Guide to Federal Tax Credits for Solar Photovoltaics.