Solar Loan Dealer Fees: Compare Cash Price and Financed Cost
By Wattcrunch · 2026-10-11 · 6 min read
A solar-loan dealer fee is a financing-related markup that can be built into the financed system price. A lower advertised interest rate does not necessarily mean a cheaper project. Compare the cash price and financed price for identical equipment and installation scope, then compare total repayment and early-payoff terms.
Why the financed price matters
The CFPB August 2024 solar-financing report describes embedded fees and payment structures that can mislead borrowers. It is historical evidence about financing risks, not a current rate survey or current tax-credit eligibility source. This guide does not assume a tax-credit payment will reduce principal.
Calculate the markup using the correct denominator
For an illustrative $24,000 cash quote and $30,000 financed quote, the difference is $6,000. That is 25% of the cash price, but 20% of the financed price. Ask which denominator is used when someone describes the fee percentage. The difference alone is not proof of a dealer fee: first reconcile equipment, roof work, warranties and other changes in scope.
Compare payment and total repayment
The table compares financing $24,000 at an entered 8% annual rate with financing $30,000 at 4%, both over 20 years with equal monthly payments and no down payment. These are illustrative rates, not lender offers. Payments use M = P*r/(1-(1+r)^(-n)), where r is the monthly rate and n is the number of payments. At a zero rate, M = P/n.
Do not confuse the note rate with disclosed APR
The calculator treats the entered annual rate as a nominal amortization rate divided by 12. Actual disclosed APR can incorporate finance charges and differ from the note rate. Use the lender payment schedule and disclosures to reconcile fees; this example does not calculate a legally disclosed APR.
A lower payment is not the entire decision
A longer term can reduce the monthly payment while increasing total interest. Compare the amount financed, total scheduled payments and balance at the date you expect to sell or refinance. Include the remaining utility bill as well as loan payments when evaluating monthly affordability. Solar savings are uncertain; contractual payments are not automatically reduced when generation is low.
Early payoff changes the comparison
An embedded markup may already be part of principal even if you repay early and avoid future interest. Request payoff balances at your planned dates, prepayment conditions and any required principal payment or recast provisions. Do not assume a advertised initial payment lasts for the entire loan term.
Request a written like-for-like quote
Request the cash installation price, financed installation price, down payment, principal, note rate, disclosed APR, payment schedule, fees, liens, transfer terms and total repayment. Compare warranties and equipment separately. A lender should explain any payment change in writing. Obtain independent financial or legal advice for contract-specific questions.
| Amount financed | Entered annual rate | Monthly payment | Total scheduled repayment |
|---|---|---|---|
| $24,000.00 | 8% | $200.75 | $48,178.95 |
| $30,000.00 | 4% | $181.79 | $43,630.58 |
Sources for this article
- CFPB: Solar Financing, published August 7, 2024 (historical financing risks) (source checked 2026-10-11)
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How do I compare the cash and financed price?
Request identical installation scope and equipment before subtracting prices. Then compare principal, note rate and scheduled repayment.
Worked example: $30,000 financed minus $24,000 cash is $6,000: 25% of cash price but 20% of financed price.
What to verify: A scope difference is not proof of a dealer fee. Use written lender disclosures.
Method reference (not verification of example prices)Planning notes updated October 12, 2026. Example assumptions are not a local tariff.
Does early payoff remove an embedded financing markup?
Avoiding future interest does not automatically refund an amount already included in principal. Request actual payoff balances and prepayment terms.
Worked example: If financed principal includes an illustrative $6,000 markup, paying early does not by itself change the original amount financed.
What to verify: Contract terms govern refunds, penalties and transfer obligations. Do not infer them from APR alone.
Method reference (not verification of example prices)Planning notes updated October 12, 2026. Example assumptions are not a local tariff.
Run the numbers yourself →
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