Solar Lease vs Purchase Calculator
Solar System Details
Lease vs Purchase
Purchase: Higher upfront cost, but you own the system. 30% federal tax credit, full energy savings.
Lease: No upfront cost, but you pay monthly. No tax credit. Savings shared with leasing company.
Tip: Purchase usually saves more money long-term if you can afford the upfront cost.
About This Calculator
This solar lease vs purchase calculator helps you move from raw inputs to a decision-ready output in seconds.
Inside solar & energy, this tool gives you a practical way to model scenarios, compare outcomes, and make better next-step decisions without spreadsheet overhead.
If your workflow expands, pair this calculator with Solar Panel ROI Calculator and Solar Panel System Sizing Calculator to cross-check assumptions and build a stronger analysis chain.
Formula
Lease total = Σ(Monthly payment × (1 + Escalator)^year) × 12 × Years | Purchase total = (System cost - Tax credit) or Loan total if financed | Lease savings = Production guarantee × Electricity rate × Years - Lease total | Purchase savings = Production × Electricity rate × Years - Purchase total | Net comparison = Purchase savings - Lease savings
Example Calculation
The worked example below demonstrates how the input fields translate into the final output. Use it as a quick validation pass before entering your own numbers.
- Lease: Monthly payment, Escalator, Term, Production guarantee: 6
- Purchase: System cost, Tax credit, Interest rate, Loan term: 8
- Both: Electricity rate, Annual rate increase: 12
Explanation of Results
Result Interpretation
The solar lease vs purchase calculator returned calculated value based on Lease: Monthly payment, Escalator, Term, Production guarantee 6, Purchase: System cost, Tax credit, Interest rate, Loan term 8, and Both: Electricity rate, Annual rate increase 12. Use this result as a baseline, then adjust one input at a time to understand how sensitive your outcome is before making decisions.
FAQ
How should I validate the solar lease vs purchase calculator result?
Run a second scenario with rounded numbers, then compare the direction and magnitude of the change before using the value operationally.
What formula is this based on?
This page uses the following formula logic: Lease total = Σ(Monthly payment × (1 + Escalator)^year) × 12 × Years | Purchase total = (System cost - Tax credit) or Loan total if financed | Lease savings = Production guarantee × Electricity rate × Years - Lease total | Purchase savings = Production × Electricity rate × Years - Purchase total | Net comparison = Purchase savings - Lease savings
Can I bookmark this solar & energy tool?
Yes. Use the canonical URL /construction-architecture/solar-energy/solar-lease-vs-purchase-calculator to return to this calculator in the Construction & Architecture library.
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See Also
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