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Free solar calculator
Solar cost calculator: is your solar deal worth it?
Three free tools: see what your lease, loan or PPA really costs, whether you overpaid, and what your exported power is actually worth. Private and instant.
Your solar agreement
Your electric bills
Check any that apply
Did you pay a fair price?
Compares your price per watt with the national average quoted price of about $2.60 per watt (EnergySage, 2026). Installed prices vary by state; Lawrence Berkeley National Laboratory put the 2024 cash-purchase median near $3.50 per watt.
What are your exports actually worth?
Export credit rules differ by state and utility. Enter the credit your bill actually shows. Pick your utility and the rate that applies to you, then compare it with what your proposal assumed.
Estimates only, based on the numbers you enter and the published benchmarks shown. This tool is not legal or financial advice and doesn't determine whether any contract can be cancelled. Never stop making payments based on these results. national Solar Cancellation is not a law firm. Benchmarks last verified October 5, 2026.
How it works: Enter numbers from your solar agreement and utility bills. The calculator compares what you pay now with what you paid before solar and what you were promised, projects remaining payments with any escalator, and compares your price per watt with the national average quoted price of about $2.60 per watt from EnergySage. Nothing you enter is saved or sent anywhere.
On this page
About the price benchmark
Quoted marketplace prices run lower than many real-world installs. Lawrence Berkeley National Laboratory put the 2024 median price for cash-purchased residential solar near $3.50 per watt. Prices also vary widely by state, so treat the benchmark as a starting point, not a verdict.
What your results mean
- Mostly in line (75 to 100): few common warning signs in what you entered.
- Worth a closer look (50 to 74): warning signs worth reviewing.
- Significant red flags (below 50): several warning signs, like a missing Notice of Cancellation or paying more than before solar.
The score isn’t a legal assessment. See our solar contract checklist.
Numbers don't look right?
A free intake reviews your agreement and bills.
Common questions
Solar cost calculator FAQs
What's the average cost of solar?
EnergySage’s 2026 marketplace average is about $2.60 per watt before incentives; real installed prices are often higher.
Is my information saved?
No. The calculator runs only in your browser.
Why is my lease or loan cost per watt so high?
Financing, dealer fees and escalators add up. A large gap from the cash price is worth a review.
Should I stop paying if my results look bad?
No. Keep paying while you explore your options.
Get your numbers reviewed for free
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Solar Cancellation HQ is not a law firm and does not provide legal advice. This page is general information, and reading it or submitting a form does not create an attorney-client relationship. Not every contract qualifies, and no outcome is guaranteed. We never advise anyone to stop making payments on a solar loan, lease or PPA. Laws and utility rules change, so verify before acting. Last verified October 9, 2026.